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Journal articles on the topic 'Ship Maintenance And Repair'
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1
Carr, Bruce A., Thomas M. Houlihan, and Michael A. Polini. "CAD/CAM in Phased Maintenance." Journal of Ship Production 7, no. 04 (November 1, 1991): 234–47. http://dx.doi.org/10.5957/jsp.1991.7.4.234.
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The authors' company is a medium-sized engineering company specializing in naval ship repair. The bulk of corporate work centers on the Phased Maintenance (PM) of three classes of ships. Typically, each PM contract covers three to five different ships per class scheduled for 90-day Availabilities at approximately one-year intervals over a period of five years. The type of work to be performed during each Phased Maintenance Availability (PMA) falls into one of two categories: ship alterations or ship repairs. The first group, ship alterations, is characterized by detailed, long-lead engineering and planning efforts, typically beginning 540 days prior to the vessels's arrival. The second group, ship repairs, makes up the other end of the spectrum with short lead times and compressed service details. The majority of repair items are identified 60 days prior to an Availability, while some are not determined until after the vessel has arrived in the shipyard. The engineering department that services PMA work is composed of three disciplines: structural, mechanical and electrical. The mechanical discipline is further subdivided into the areas of machinery and piping/HVAC. While the nature of PMA work within each discipline is peculiar to the application, the process is similar in each. Reference information is gathered and verified, technical analysis is provided where necessary, and detailed drawings are prepared and submitted for Navy approval prior to shipyard production. All drawings are developed using two-dimensional drafting techniques at various sites by teams of computer-aided design (CAD) input operators utilizing color graphic workstations on a multi-shift basis as required by the workload. Completed drawings are transferred to the engineering site over a network link, where additional workstations are available for engineers to check and correct them as necessary
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Blanton, Gerald B. "The Future of Navy Ship Maintenance — One Point-of-View." Journal of Ship Production 13, no. 02 (May 1, 1997): 147–52. http://dx.doi.org/10.5957/jsp.1997.13.2.147.
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In the next five years, Navy ship maintenance requirements will challenge both public and private ship repair organizations to provide quality upkeeps within costs and schedule constraints. This paper examines key forcing functions impacting ship maintenance decisions, discusses ongoing Navy maintenance initiatives, and speculates on maintenance philosophical changes. Finally, the paper addresses some implications of these forcing functions, initiatives, and philosophy changes on the ship repair industry.
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Ahluwalia, Rashpal, and Denis Pinha. "Decision Support System for Production Planning in the Ship Repair Industry." Industrial and Systems Engineering Review 2, no. 1 (July 8, 2014): 52–61. http://dx.doi.org/10.37266/iser.2014v2i1.pp52-61.
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All ships and offshore platforms, however large or small, undergo scheduled or unscheduled repair and maintenance. The bidding process for ship repair jobs is highly competitive and global in scope. The ship repair industry is also prone to significant risks due to high level of capital investment in skilled labor, specialized equipment, and facilities such as dry docks. Several decision support tools have been utilized by the ship repair and maintenance industry with limited success. The focus of these tools is on mid or long-term planning. They view the system as various cost centers and attempt to minimize cost at each center. This paper proposes a decision support system for short term planning. It is oriented towards day to day decision making by ship yard personnel. Its focus is on enhancing system throughput and minimizing total cost. It utilizes a common corporate database to store and retrieve information and to generate timely reports for the management. By focusing on system throughput and overall cost, unnecessary internal completion between cost centers can be avoided, resulting in fewer delays and resource overloading.
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Wittenborn, John L., and William M. Guerry. "Liability for Hazardous Wastes Produced During the Course of Ship Repair." Journal of Ship Production 6, no. 03 (August 1, 1990): 175–79. http://dx.doi.org/10.5957/jsp.1990.6.3.175.
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Many common ship repair tasks result in the production of quantities of various hazardous wastes. These wastes, regardless of volume, present difficult burdens for shipyards and the U.S. Navy. Under federal environmental laws, the responsibility for handling hazardous wastes and the liability for their ultimate disposal rests with the person or persons who create the wastes and who arrange for their disposal. Oftentimes, however, the responsibility and liability for handling and disposing of these wastes is unclear. This is especially true when naval ships are repaired in contractor facilities and wastes are produced by the activities of ships' force, contractor personnel, or some combination of the two. Further complicating the web of liability is the divergent source of the wastes. Some wastes are produced as a direct result of required maintenance work on ship systems. Other wastes may be produced in the yard by activities which are largely discretionary with the contractor. Ultimately, these wastes from all sources must be identified, packaged, stored, treated, transported, and disposed. Potential future liability may arise at each step in this process. This paper reviews briefly the structure and function of two principal federal hazardous waste statutes and explains how their myriad complex responsibilities and liabilities are applied in the context of a typical ship repair2
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Hadi, Syamsul, Alfarizi Al Azis, Vinan Viyus, Etik Puspitasari, Ahmad Hanif Firdaus, and Andri Setiawan. "Planning for Maintenance and Repair of Continuous Ship Unloader Using the IRRO Method." Logic : Jurnal Rancang Bangun dan Teknologi 21, no. 1 (March 30, 2021): 52–63. http://dx.doi.org/10.31940/logic.v21i1.2383.
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The problem faced is damage, especially to the screw conveyor from the Continuous Ship Unloader (CSU) as a dry bulk material transfer equipment (phosphate rock) which is taken from the ship's hold which is flowed by a screw conveyor followed by the belt conveyor to the material warehouse to be processed into a type of fertilizer. The purpose of planning is to obtain a schedule and estimated cost of maintenance and repair of CSU for the period 2022 to 2025, and to obtain the ratio of maintenance-repair costs to the profit of the machine. Planning methods uses the IRRO (Inspection, Replace, Repair, and Overhoul) method include data collection of machine maintenance history and component breakdowns, checking CSU specifications, making a list of component life predictions and component prices, predicting costs and duration of component dissasembly, screw conveyor repair, maintenance and repair scheduling, and maintenance and repair cost estimates. The real results of planning in the form of a maintenance and repair schedule for the period of 2022 to 2025; maintenance and repair costs respectively for the years 2022 to 2025 are IDR 136,873,000; IDR 335,986,000; IDR 160,687,000; and IDR 464,733,000; and the ratio between maintenance costs to profit for the years 2022 to 2025 is 0.51, 1.22, 0.57, and 1.63 which means the machine is still fit for use without the need for refurbishment because it is still prospective.
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JUNG, Inhwan, He SUN, Jangmook KANG, Choong Hyong Lee, and Sangwon LEE. "Big Data Analysis Model for MRO Business Using Artificial Intelligence System Concept." International Journal of Engineering & Technology 7, no. 3.33 (August 29, 2018): 134. http://dx.doi.org/10.14419/ijet.v7i3.33.18593.
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The rapidly changing environment of the shipbuilding industry has put Korea’s shipbuilding industry in a crisis. The purpose of this study was to develop a business model to maintain, maintain and operate Big Data-based MRO(Maintenance, Repair, and Operation) consumables, which is expected to be the new growth engine for the domestic shipbuilding industry. Although Korean shipbuilders have world-class technologies for ship dogma, the market for ship maintenance and repair is still in its infancy. For Korean shipbuilders, MRO business can be a growth engine that will provide food for the next 30 years, but to do so, we need to make sure that everything that happens in the entire process, from ship design to maintenance and maintenance. Therefore, by systematically establishing Big Data related to components and developing MRO business models based on data analysis capabilities using Artificial Intelligence system concept, we can develop new growth engines for related industries in Ship Industry.
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Kartiko, Donni, Suparno Suparno, Okol S Suharyo, Ahmadi Ahmadi, and Arica Dwi Susanto. "DETERMINATION OF MAINTENANCE PRIORITY INDONESIAN NAVY SHIP DEPO LEVEL USING FUZZY MCDM." JOURNAL ASRO 9, no. 2 (September 10, 2018): 75. http://dx.doi.org/10.37875/asro.v9i2.79.
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The Indonesian Navy as a defense and security force of the sea has combat tools and supporting facilities projected in the Integrated Fleet Weapon System (Sistem Senjata Armada Terpadu/SSAT) with several components including Indonesian navy ships, marines, aircraft and bases. Depo level maintenance is comprehensive maintenance that can only be carried out by personnel who are experts in their field and supported by complete and sophisticated equipment and facilities. Maintenance at this level includes complete overhaul repairment, repowering MLM (mid life modernization), calibration of all equipment, and repairs to all parts thoroughly. Depo Level Maintenance is the nature of maintaining technical conditions based on rotary hours. If the repair schedule specified in the SPT (System for Planned Maintenance), the schedule must be carried out. This research aimed to present a priority setting solution in Depo level maintenance wherein the highest Indonesian Navy Ship ranking is determined from the level of the decision makers. Fuzzy MCDM is a method developed for decision making on several alternative decisions to get an accurate and optimal decision. In Indonesian Navy Ship Hardepo priority ranking process taken from the level of data processing decision makers using the Fuzzy MCDM method, the 5 highest priority values in implementation were obtained. Hardepo with the highest scores were KRP-812 0.111, BDU-841 0.108, LAM-374 0.107, KRS-624 0.097 and TJA-541 0.073
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Doherty, Owen J. "Ready Reserve Fleet: Ship Maintenance and Activations." Journal of Ship Production 13, no. 03 (August 1, 1997): 188–97. http://dx.doi.org/10.5957/jsp.1997.13.3.188.
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As the size of the United States flag fleet continues to shrink, the Ready Reserve Force (RRF) assumes an even greater importance in national emergencies. There are approximately 100 RRF vessels located throughout the littorals of the United States. The outported vessels are shown in Fig. 1. Other vessels are either located at one of the three Reserve Fleets or have been activated for the Department of Defense. The maintenance of these vessels is critical to their successful activation and operation. The Maritime Administration (MARAD), which is part of the Department of Transportation, has taken action on key areas of concern in the lessons learned from Desert Shield/Desert Storm. This has resulted in improving the reliability and timeliness of the vessels in meeting their activation requirements. One major improvement (started in fiscal year 1996) is the placement of nine-and ten-man crews onboard the majority of the vessels to ensure readiness. In addition, sea trials and dock trials will be conducted more frequently. Some system upgrades are being accomplished for safe, reliable operations. Also, MARAD is reviewing contracting procedures to improve and to simplify the award of ship repair contracts. This paper gives an overview of how MARAD maintains RRF vessels. In particular, it discusses the type and amount of outside support (industrial assistance) needed to both maintain and activate the vessels. There is a wide variety of vessels in the RRF, ranging from break-bulk ships to offshore petroleum discharge vessels. Furthermore, the RRF fleet is strategically located across the United States, requiring a widespread need for industrial assistance in terms of both type and location of services required.
9
Charchalis, Adam. "Measurement and Diagnostic System for Marine Engines." Journal of KONBiN 49, no. 3 (October 1, 2019): 33–48. http://dx.doi.org/10.2478/jok-2019-0049.
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Abstract The Scheduled Maintenance System allows ship-owners and operators to plan, carry out and document the maintenance and repair of equipment and mechanisms on board the ship at intervals in accordance with the class requirements imposed by the Classification Societies and the manufacturer of the equipment. In order to develop the research capabilities of the Faculty of Marine Engineering of Gdynia Maritime University, a Measurement and Diagnostic System has been developed to assess the technical condition of machinery and equipment in operation on board the ship. Modernization of measuring equipment, significantly expanded the research capabilities, which resulted in increasing the scope, improving quality, and speeding up the research and development work in the field of safety of operation and diagnostics of engine rooms and ship operation.
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Apriliani, Izza M., Sugeng H. Wisudo, Budhi H. Iskandar, and Yopi Novita. "JARINGAN KERJA DAN EFEKTIVITAS PERBAIKAN KAPAL DI GALANGAN KPNDP DKI JAKARTA, MUARA ANGKE (Network and Effectiveness of Ship Repair at KPNDP Shipyard DKI Jakarta, Muara Angke)." Marine Fisheries : Journal of Marine Fisheries Technology and Management 5, no. 1 (September 28, 2016): 79. http://dx.doi.org/10.29244/jmf.5.1.79-89.
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<p>ABSTRACT<br />A shipyard is a supporting element to meet the eligibility requirements through maintenance service for vessels and their engines. Lead time for ship repair may vary, depending on the condition of ship. The length of the ship repair process can lead to shipyard queuing. One attempt to improve the mechanism and ship repairing time is by analyzing the network. This study aims to identify the network diagram, to determine the critical path, and to find out the effectiveness of ship repair process. Activities and duration during ship repairing process were analyzed using critical path method (CPM) and measured the value of its effectiveness. The objects that were observed in this study are minor repairs and major repairs. The results showed that a minor repairs can be implemented in 7 days while based on productivity index it can be completed in 5 days and has a 98% effectiveness than the time alocated by the shipyard. Major repairs can be completed during 10 days; these repairing lead time were affected by damage to the machine which requires a long recovery process.</p><p><br />Key words: CPM, effectiveness of ship repair, network analysis</p><p>-------</p><p><br />ABSTRAK</p><p>Galangan kapal merupakan unsur penunjang untuk memenuhi kebutuhan kelaikan kapal melalui perawatan beserta mesinnya. Proses perbaikan kapal dapat bervariasi tergantung dengan kondisi kapal. Lamanya proses perbaikan kapal dapat mengakibatkan terjadinya antrian galangan. Upaya untuk meminimalisir antrian kapal salah satunya dengan menganalisis jaringan kerjanya. Penelitian ini bertujuan untuk mengidentifikasi struktur jaringan kerja, menentukan jalur kritis serta mengetahui efektifitas proses perbaikan kapal. Proses dan waktu perbaikan kapal dianalisis menggunakan metode jalur kritis (Critical Path Method) kemudian dihitung nilai efektivitasnya. Hal yang diamati dalam penelitian ini yaitu perbaikan ringan dan perbaikan berat. Hasil penelitian menunjukkan bahwa penyelesaian perbaikan ringan di galangan KPNDP membutuhkan waktu selama 7 hari sedangkan berdasarkan index produktivitasnya dapat diselesaikan selama 5 hari dan memiliki efektivitas 98% dibandingkan waktu yang dialokasikan oleh galangan. Perbaikan berat dapat diselesaikan selama 10 hari, lamanya perbaikan ini dipengaruhi dengan kerusakan mesin yang membutuhkan proses perbaikan yang lama.</p><p><br />Kata kunci: CPM, efektivitas perbaikan kapal, analisis jaringan kerja</p>
11
Kimera, David, and Fillemon Nduvu Nangolo. "Predictive maintenance for ballast pumps on ship repair yards via machine learning." Transportation Engineering 2 (December 2020): 100020. http://dx.doi.org/10.1016/j.treng.2020.100020.
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Bin Abdul Wahid, Al-Shafiq, Mohd Zamani Bin Ahmad, Sunarsih ., Mohd Najib Bin Abdul Ghani Yolhamid, Mohamad Abu Ubaidah Amir Abu Zarim, Aisha Binti Abdullah, and Nur Hanani Bt Ahmad Azlan. "Measuring Severity of Downtime Influence Factors to Naval Ship Operational Availability: A Delphi Study." International Journal of Engineering & Technology 7, no. 2.29 (May 22, 2018): 940. http://dx.doi.org/10.14419/ijet.v7i2.29.14288.
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Rapid development of shipbuilding and ship repair industry in recent years has been increasingly transforming the way organizations apply the long term strategic thinking of “cradle to grave” maintenance approach in order to maximize their growth in a dynamic marine industry. With increased ship complexity, size and revolutionary design, organizations strive to balance ideal maintenance philosophies against on-going efforts of cost reduction whilst maintaining high availability of vessels. Despite aspiration and efforts to improve the ship availability, the Royal Malaysian Navy [RMN] vessels which are currently maintained under the In Service Support [ISS] Contracts are hardly tackling the human and equipment related aspects due to limited knowledge and available data on ship Downtime Influence Factors [DIFs]. The current research carried out an explorative study across various engineering disciplines to generate RMN ship maintenance DIFs and their severity measures via a 3-Stage Modified Delphi approach. 30 Experts experienced in daily implementation of naval ship maintenance contracts were involved. In the first stage, Focus Group Discussions [FGDs] amongst Experts were conducted to produce the DIFs, followed by questionnaire distribution to measure the severity of the DIFs in the second stage. In the third stage, the Severe DIFs were confirmed and ranked based on a Risk Assessment method. The study revealed 50 DIFs to RMN ship availability and deduced the top 15 Severe DIFs pinpointing the key problem areas to prioritize efforts in improving RMN ship availability.
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van Rossum, Matthias. "Building maritime empire: Shipbuilding and networks of coercion under the Verenigde Oost-Indische Compagnie (VOC) in South and Southeast Asia." International Journal of Maritime History 31, no. 3 (August 2019): 465–80. http://dx.doi.org/10.1177/0843871419860699.
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This article maps the overseas infrastructure of the Dutch East India Company (VOC) for ship maintenance and shipbuilding. Reversing the perspective on the VOC, emphasizing the centrality of the ‘overseas’ or Asian activities, it studies how the VOC set up an infrastructure for shipbuilding, ship maintenance, and the necessary supporting industries in Asia. Historians have primarily examined the Company as a ‘merchant’, but the organization of the workplaces and underlying infrastructure for building and repairing ships reveals how important it activities and role as ‘potentate’ and ‘producer’ were. Mobilizing the resources and labour needed for the maintenance of its maritime infrastructure, especially in shipbuilding and repairs, the Company alternated monopolistic and outsourcing strategies, and regularly resorted to coercion.
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Jakovlev, Sergej, Arūnas Andziulis, Andrius Daranda, Miroslav Voznak, and Tomas Eglynas. "RESEARCH ON SHIP AUTONOMOUS STEERING CONTROL FOR SHORT-SEA SHIPPING PROBLEMS." Transport 32, no. 2 (May 30, 2017): 198–208. http://dx.doi.org/10.3846/16484142.2017.1286521.
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Today most ship rotation angle (steering control during movement) increase or decrease is done using an operator on deck or the auxiliary system in the ships engine room. Formal regulations suggest using manual inspection of the ship rotation and the work effectiveness of the engine during manoeuvring in ports and in the open sea regions. The accuracy of this procedure is very low and depends on the personnel of the deck. Therefore, automation and computer control systems are constantly required to assist the human eye. This problem becomes clearly visible when dealing with full ship autonomy in the open sea in the short-sea shipping regions. The trend of maritime technology development will only increase in the area of human interaction decrease with the physical operations and the shipping procedures, which will lead to the future full ship autonomy in the open sea regions around the globe. With the growing automation technologies, predictive control can prove to be a better approach than the traditionally applied visual inspection policy and linear control models. Ship full autonomy is also linked to the ship’s machinery regular repair and maintenance that has to be carried out for delivering satisfactory performance and minimizing downtime during transportation operations. In this paper, current stages of development of the intelligent transportation system concept are discussed for the ship autonomy in manoeuvring control and a robust ships’ systems integration and communication system concept is presented for several normal and abnormal situations: high-traffic, potentially dangerous situations or port approaching or ship maintenance, with the capability to solve problems with the limited human interface and with a remote control possibility. Then, simplified ship steering motor system for the main pump is analysed for rotation control using control voltage from the converters. Retrieved data from a small experimental control motor is used for the predictive control approach using two different methods: a neural network trained with Basic Levenberg– Marquardt Method and a Linear Model.
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Dlugokecki, Victoria, Dennis Fanguy, Lisa Hepinstall, and David Tilstrom. "Transforming the Shipbuilding and Ship Repair Project Environment." Journal of Ship Production and Design 26, no. 04 (November 1, 2010): 265–72. http://dx.doi.org/10.5957/jspd.2010.26.4.265.
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In April 2008, NSRP awarded the project entitled "Customization of Web-Based Planning and Production Engineering Technologies to Support Integrated Shipyard Work Flow," a collaborative research project that included Bollinger Shipyards and Atlantic Marine-Mobil. The purpose of the project was to develop and validate a project management approach to shipbuilding and ship maintenance through the delivery of a web-based production and engineering management tool tailored to the needs of this industry along with a reliable, exportable implementation process using planning and production engineering methodologies. This project was designed to enable shipyards to achieve reduction in project costs and cycle time through project standardization and the ability to perform rapid replanning while maintaining align-ment of all project stakeholders in real time. The project enabled the shipyards to bring forth quantifiable improvement opportunities that reflected the biggest impact on project delivery. This paper shares insight into the key findings derived through this transformational body of research, as well as provide an understanding of the robust process used to implement the shipyard-specific web-based project solutions in ship-building and ship repair project environments. The paper also provides a quantification and appreciation of the resulting cost benefits experienced by each of the participating shipyards. New construction programs in each of the shipyards enabled real-time metrics to be captured, illustrating the achievement of cost reduction opportunities resulting from this project.
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Kwon, Kihyon, and Dan M. Frangopol. "Fatigue Life Assessment and Lifetime Management of Aluminum Ships Using Life-Cycle Optimization." Journal of Ship Research 56, no. 02 (June 1, 2012): 91–105. http://dx.doi.org/10.5957/jsr.2012.56.2.91.
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The development of aluminum ship structures has been promoted in the context of the rapid evolution of high-speed and light-weight vessels. Under the repeated and/or fluctuating application of stresses during voyages, fatigue damage of structural ship members is accumulated. For this reason, fatigue reliability analysis has to be conducted for assessing and predicting lifetime performance of aluminum ships. This assessment offers the opportunity to optimally perform the lifetime ship structural management planning. To allocate limited financial resources required to balance the lifetime reliability of ship structural details and the life-cycle cost, single-or multi-objective optimization can be used. The multi-objective optimization problem has several competing objectives such as:(minimizing the life-cycle maintenance cost,maximizing the fatigue reliability of details with welded attachments, andminimizing the fatigue damage. The S-N (stress vs. number of cycles) approach and available sea loading information are used to evaluate the time-dependent fatigue reliability. In this paper, the estimated fatigue reliability is incorporated into a life-cycle cost optimization problem to find the optimal inspection and repair interventions. The proposed approach is illustrated on an aluminum ship detail.
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Kr Dev, Arun, and Makaraksha Saha. "Modeling and Analysis of Ship Repairing Labor." Journal of Ship Production and Design 32, no. 04 (November 1, 2016): 258–71. http://dx.doi.org/10.5957/jspd.2016.32.4.258.
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Labor cost is an important and sensitive issue in labor intensive industry. Ship repairing work is, by nature, labor intensive and not prone to automation. In normal ship repairing or routine maintenance of a ship, labor cost contributes the highest amount in the final invoice. This figure may go up to 70% of the total cost. This cost is directly contributed by labor (man-days) utilized for the ship repairing works. Owners and shipyards are always very keen for lowering the man-days value. Lesser man-days can directly be translated into the lower final invoice (for the owner) and higher productivity (for a shipyard), which can help the shipyard to stay in a competitive market. Ship repairing labor (man-days) and related information for 50 cargo ships of various ages, sizes and types were collected from a single shipyard. A multiple linear regression model was developed and analyzed using these primary data. Ship repairing labor was then expressed as a function of a ship's age, deadweight, type, and repairing works consisting of mainly hull blasting, hull painting, structural steel, and piping. The "method of least squares" was applied to estimate the regression coefficients. In this article, the authors have made an attempt to identify those independent variables that influence ship repairing man-days (the dependent variable) and their interrelationship. A mathematical model has thus been developed and proposed, as a guiding tool, for the decision maker to estimate a more realistic ship repairing labor (man-days) for ships to be under repair.
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Ribeiro da Silva, Filipa. "Dutch, English and African shipbuilding craftsmanship in precolonial West Africa: An entangled history of construction, maintenance and repair." International Journal of Maritime History 31, no. 3 (August 2019): 508–20. http://dx.doi.org/10.1177/0843871419862169.
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In comparative perspective, this article examines the shipping, construction, maintenance and repair of Dutch and English ships, boats and canoes operating in West Africa during the precolonial period. In addition, I discuss the strategies adopted by Dutch, English, and other ‘nations’ of merchants present in the various coastal regions of the African continent, to cope with the challenges posed by port-to-port navigation and transportation in shallow river estuaries along the western coast of Africa. Among these strategies were the transport of pre-fabricated boats of small dimension to the coast on board of heavier ships and recruitment of personnel specialised in ship repair and shipbuilding, to the acquisition, either temporary or permanent, of African boats and recruitment of African boatmen. In this way, merchants’ success on the coast was dependent on both European and African shipbuilding craftsmanship and navigational skills. Our analysis is based on information gathered from travelogues, journals of voyages and collections of correspondence exchanged between European merchants and their commercial agents based in Africa, and between officials of the private European commercial companies on the African coast.
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Zhang, Shou Jun, and Bin Li. "Hydraulic Steering Gear Failure Analysis and Troubleshooting for MV “TANSUO HAO”." Applied Mechanics and Materials 672-674 (October 2014): 1611–16. http://dx.doi.org/10.4028/www.scientific.net/amm.672-674.1611.
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The rudder and steering gear is the most widely used ship maneuvering equipment. It consists of the maneuvering device, transmission mechanism, steering gear, steering mechanism and the rudder blade. MV "TANSUO HAO" is a scientific research ship of 30 years old. The scientific exploration missions require a very high accuracy of the ship’s course, so the ship has to constantly adjust her course and steer frequently. On that day, the duty officer found the steering gear failure to turn left in the rough sea condition. The engineering crew members had to make an emergency repair. It took plenty of time to locate the trouble of the steering gear in the repair process, because the valve plate deformation problem on the solenoid reversing valve was very hard to find out. By exploring the obscure steering gear failure reason and special troubleshooting process on MV "TANSUO HAO", this thesis provides some repair experience for the hydraulic system management and proposes flexible and patient failure analysis as well as some preventive maintenance measures against the problem.
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Saravanan, A. S., Jayalakshmy Ramachandran, A. Seetharaman, Karripur Nanda Kumar, and Kailash C. Joshi. "Empirical Analysis of Factors Influencing Use of Internet on Ships." JABM JOURNAL of ACCOUNTING - BUSINESS & MANAGEMENT 1, no. 25 (August 14, 2018): 35. http://dx.doi.org/10.31966/jabminternational.v1i25.328.
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The purpose of this study was to evaluate the factors influencing the emergence of internet on ships and the resultant cost. Data collected from 255 respondents, mainly seafarers (captain and officers) and shore- based ship managers revealed that emergence of the internet on ships is influenced by perceived usefulness, organisation readiness, external pressure and technology penetration. It is also witnessed that cost of internet on ships has an effect on the penetration of the internet and new technology. The emergence of the internet on ships provides an effective communication link with all stakeholders of the ship, enhances safety and security with real time data on cargo, incidents, piracy, terrorism and weather conditions. It facilitates timely delivery of stores and spare parts for ship repairs and maintenance, thus providing immense satisfaction to all stakeholders. It thus has a significant impact on the industry.
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Chae, Chong-Ju, Mingyu Kim, and Hyung-Ju Kim. "A Study on Identification of Development Status of MASS Technologies and Directions of Improvement." Applied Sciences 10, no. 13 (June 30, 2020): 4564. http://dx.doi.org/10.3390/app10134564.
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The introduction of the maritime autonomous surface ship (MASS) to the maritime industry will open up a new era and bring about a new paradigm shift in terms of cost efficiency, maritime accidents, and human resources. Various studies are currently being conducted to realize the MASS. Understanding the scope and direction of these studies will be of great help for future MASS research. In this study, the current development status of technologies for autonomous ships is identified, and considerations and directions of improvement are suggested for six major research fields that cover all technological issues of MASS. Firstly, the results of the regulatory scoping exercise (RSE) on the International Maritime Organization (IMO) conventions to accept MASSs are identified; in particular, human elements are identified as vital issues to be considered for the design and operation of MASSs. Secondly, various studies on the decision-making system are identified, and the future direction is suggested. Thirdly, in terms of ship design and propulsion system, design changes for autonomous cargo ships are investigated, with their potential impacts to be considered. Fourthly, the communication system will need to be robust and supported by multiple systems to minimize potential risk with third-party infrastructures, and suitable protection of systems, networks, and data will be required as an integral part of the safety system for cybersecurity. Fifthly, issues of maintenance and repair are identified, with a maintenance strategy to be considered. Lastly, hazard analysis of the autonomous ship is explored, and system-theoretic process analysis (STPA) and the functional resonance analysis method (FRAM) are identified as the most representative new methods that can be used for hazard analysis of autonomous ships.
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VERMA, AJIT KUMAR, A. SRIVIDYA, ANIL RANA, and SANJAY K. KHATTRI. "OPTIMIZATION OF MAINTENANCE SCHEDULING OF SHIP BORNE MACHINERY FOR IMPROVED RELIABILITY AND REDUCED COST." International Journal of Reliability, Quality and Safety Engineering 19, no. 03 (June 2012): 1250014. http://dx.doi.org/10.1142/s0218539312500143.
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Ships have a wide variety of machinery available onboard that is crucial for her sustenance at sea for prolonged durations. The machinery can be grouped into various plants, such as propulsion plant, air conditioning plants, power generation plants, etc., each having its own specific function. The plants in turn are composed of various systems which further comprise various types of machinery. There are redundancies built in at the plant level, as well as at the system and at machinery level, so as to improve the reliability of the ship as a whole. Planning of maintenance schedule, specifically for tasks which can only be undertaken in an ashore repair yard is a daunting task for the maintenance managers. The paper presents a NSGA-II (nondominated sorting genetic algorithm) based multi-objective optimization approach to arrive at an optimum maintenance plan for the vast variety of machinery in order to improve the average reliability of ship's operations at sea at minimum cost. The paper presents the advantages that can accrue from introducing short maintenance periods for a select group of machinery, within the constraints of mandatory operational time, over the method of following a common maintenance interval for all the machinery. The problem function in hand is nonlinear, multi-modal and multi-objective in nature. The search spaces for the problem is noncontinuous and the (multiple) variables, such as time interval for maintenance, serial number of equipment, number of minor maintenance actions, etc., are uncoded real parameters.
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Rana, Anil. "Optimal maintenance level of equipment with multiple components." Journal of Quality in Maintenance Engineering 22, no. 2 (May 9, 2016): 180–87. http://dx.doi.org/10.1108/jqme-07-2014-0043.
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Purpose – The purpose of the paper is to provide a method for selection of an optimum level of repair by replacement of an equipment based on its cost. In a ship where the engineer has a vast variety of equipment and systems to operate and maintain within limited time frames and availability of human resources, it is often difficult to disassemble a whole equipment to replace a faulty component. It is instead a lot easier to just replace the faulty equipment with whole new equipment. However, such a decision comes at an enormous capital cost. Therefore, the key question is, can we have a model to help us arrive at a decision on the correct level of carrying out repairs? Design/methodology/approach – The paper uses a model based on cost and convolution of failure distributions of critical sub-components of an equipment. Necessary assumptions based on real life experience have been incorporated in the model. Findings – The paper used an example of a particular type of motor driven sea water centrifugal pump which was commonly used in main engine sea water system, firefighting system, air conditioning system, etc. The pump had one of the highest failure rates in the ship (approximately one failure per 150 days) and the engineers found it cost and time effective to replace the entire pump on failure rather than carrying out replacement of the failed components. The model analyzed that the engineer’s hunch was not off the mark. Research limitations/implications – The implication of the work presented in the paper will be savings in maintenance cost and downtime due to optimal level of repairs on a multi-component equipment. The limitations of the work are assumption of independence of failures of components. This may not be true in all the cases. Further, opportunity based maintenance has also not been considered. Originality/value – The originality of the paper lies in the presentation of a method for selection of an optimum level of maintenance for a multi-component equipment
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MAYER, BRIAN, SHAHRUKH IRANI, and HOSNI ADRA. "Virtual Shop Clusters: A New Layout Concept for a Ship Repair and Maintenance Facility." Naval Engineers Journal 120, no. 2 (October 2008): 99–111. http://dx.doi.org/10.1111/j.1559-3584.2008.00128.x.
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ABLAEV, A. R. "ANALYSIS OF METHODS FOR INCREASE OF EFFICIENCY OF SHIP DIESELS OPERATION WITH RESTORED PISTONS HEADS." Fundamental and Applied Problems of Engineering and Technology 4, no. 1 (2020): 117–21. http://dx.doi.org/10.33979/2073-7408-2020-342-4-1-117-121.
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Recommendations on maintenance for increase of efficiency of ship diesels operation with restored pistons heads, necessity of perfecting of the ways and the criteria of repair of heads of pistons of slow-speed engines for receipt of the details with running abilities, maximally effective in modern conditions of functioning are considered in this article.
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Blatchley, Charles, Joseph Connors, and Anthony Vecino. "An Integrated Approach to Shipboard System and Equipment Testing for Improved Maintenance Management." Marine Technology and SNAME News 26, no. 02 (April 1, 1989): 105–19. http://dx.doi.org/10.5957/mt1.1989.26.2.105.
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Commercial operators today are required to maintain maximum vessels in-service levels and, with government vessel operators competing for decreasing operating funds, the management of ship maintenance and repair (M&R) has become a highly visible area which can have a significant impact on overall vessel operating costs. As an approach to consolidate, improve, and simply better manage a vessel's state of material condition and M&R requirements, an integrated shipboard Material Condition Assessment Program can be implemented which provides a comprehensive evaluation and assessment of the various critical components on a ship-specific basis. This approach will integrate all vessel material condition assessment techniques and periodic surveys whose results can be used for advanced maintenance planning and budgeting. The approach and methodology employed and described in this paper are not new, having been tried and proven to varying degrees in the marine and related industrial fields, and are considered within the constraints of day-to-day vessel operation and maintenance management.
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Nuchturee, Chalermkiat, Tie Li, and Hongpu Xia. "Design of Cost-Effective and Emission-Aware Power Plant System for Integrated Electric Propulsion Ships." Journal of Marine Science and Engineering 9, no. 7 (June 22, 2021): 684. http://dx.doi.org/10.3390/jmse9070684.
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Extensive electrification of ship power systems appears to be a promising measure to meet stringent environmental requirements. The concept is to enable ship power management to allocate loads in response to load variations in an optimal manner. From a broader design perspective, the reliability of machinery operation is also of importance, especially with regard to the failure cost from power outages. In this paper, an approach for determining optimal power plants based on economic and environmental perspectives across several architecture choices is proposed. The design procedure involves the implementation of metaheuristic optimization to minimize fuel consumption and emissions released, while maintenance and repair services can be extracted using reliability assessment tools. The simulation results demonstrated that ship power management using the whale optimization algorithm (WOA) was able to reduce fuel consumption and corresponding emissions in a range from 4.04–8.86%, varying with the profiles, by eliminating inefficient working generators and distributing loads for the rest to the nearest possible energy-saving areas. There was also a trade-off between maintenance service and overall system expenses. Finally, a compromise solution was sought with the proposed holistic design for contradictory cost components by taking into account fuel operation consumption, shore electricity supply, maintenance service and investment expenditure.
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Platonova, Nonna. "The fishery in the northern regions of the Far East of the USSR in the context of late Soviet modernization." SHS Web of Conferences 112 (2021): 00020. http://dx.doi.org/10.1051/shsconf/202111200020.
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The article describes the development of the fishing industry in Kamchatka, Sakhalin, and Magadan regions in 1965-1985. In a general historical context, the article pays attention to the modernization processes in the fishery of the northern regions of the Far Eastern territory, emphasizing general trends and differences in their dynamics. The special importance and level of development of the material and technical base of the fishing industry is noted. The article reveals the working conditions of ship repair enterprises and the reasons for the financial deficit of ship repair. Statistical data on the accident rate of fishing vessels of the branch administrations of Kamchatka, Sakhalin, and Magadan are analyzed. The results of the introduction of 200-mile economic zones that complicated the fishing activities of enterprises and the fleet of the fishing industry in the northern regions of the Soviet Far East are shown. It was found that social and economic experiments in the late Soviet period and modernization, which was carried out from above by the political elite, did not eliminate disproportions in the development of the fishery. Territorial remoteness, difficulties of timely material and technical supply and ship repair and maintenance problems were difficult-to-overcome challenges which accelerated the systemic crisis in the fishery.
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Maltais, Alexandrine, Nikola Petrov, Michel Thibault, and Benoit Bissonnette. "UHPFRC for concrete repair." MATEC Web of Conferences 199 (2018): 07007. http://dx.doi.org/10.1051/matecconf/201819907007.
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As part of the St. Lawrence Seaway lock maintenance, the current practice is to perform concrete repairs entirely with reinforced concrete, using either ordinary concrete or high performance concrete (HPC) mixtures. However, with the recent advances in the field of ultra-high performance fiber-reinforced concrete (UHPFRC), the use of this new material is considered in view of improving the overall performance of repairs. The goal is to implement repairs capable of dissipating a lot of energy before breaking when a ship hits a concrete lock wall. Numerous rehabilitation materials and methods have been experimented in the past. They all were unsuccessful due to inadequate shear and impact strength characteristics of the repair materials used. These needs can be efficiently fulfilled with UHPFRC, with their superior mechanical properties and very high energy-dissipation ability. To analyze the in-situ behavior of UHPFRC, two main mixture designs were investigated: a 160-MPa mixture containing 3% of steel fibers and a 120-MPa mixture containing 3.5% of a steel fiber blend. Thick repairs with average depths of 700 mm were carried out during the winter shut down period, in very harsh climatic conditions (-12 °C, gusty wind). The performance exhibited by the repairs after a full year shows that UHPFRCs can withstand very effectively the impacts from the transiting vessels
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Kawamura, Y., and Y. Sumi. "Information System for Structural Integrity of Ships." Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment 219, no. 2 (June 1, 2005): 93–106. http://dx.doi.org/10.1243/147509005x10422.
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The maintenance of ship structures is very important to avoid serious casualties such as oil spill from tankers. For this reason, it is necessary to detect and evaluate the state of the damages properly. In this paper, a new concept of an information system for structural integrity of ships is proposed in order to improve the safety and to assess the condition of structural strength in service. In this system, all information of damages in a certain ship obtained from hull surveys is managed in an information database, allowing assessments to be made at any time in the ship's life of the present structural integrity status or provisions to be made for the future. By using the proposed concept it becomes possible to provide a valuable tool for repair management and planning. One of the advantages of this concept is that reasonable and advanced assessment of an aged ship is readily achievable by using the information about damages and the three-dimensional structural data stored in the database. Based on the proposed concept, a prototype system for the evaluation of corrosion damages is developed by using the STEP (standard for the exchange of product model data) technologies with the proposal of a data model of the information system. Also, a method for the import of ship structural data into the database is studied for practical development of the system. Moreover, a framework for the generation of analysis models for strength of aged ships is proposed, by which labour saving is possible using a generating analysis model. The validity of the effectiveness of the proposed concept is shown with some examples.
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Jiang, Ge, Dingzhong Feng, and Weihang Zhu. "A Large and Heavy Cargo Transport System Designed for Small and Medium Ship Maintenance and Repair." Journal of Ship Production and Design 33, no. 3 (August 1, 2017): 212–20. http://dx.doi.org/10.5957/jspd.33.3.160019.
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Panchuk, Myroslav, Aleksander Sładkowski, Andrii Panchuk, and Iryna Semianyk. "New Technologies for Hull Assemblies in Shipbuilding." Naše more 68, no. 1 (February 2021): 48–57. http://dx.doi.org/10.17818/nm/2021/1.6.
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The modern stage of shipbuilding industry development is characterized by an intense competition and the beginning of introduction of new materials and effective welding technologies, which change the appearance of this quite conservative field, at leading global shipbuilding enterprises. In particular, the application of laser technologies during ship construction decreases the cost of hull manufacturing by 30%, increases the production capacity by 10%, and reduces welding deformations by 30% compared to traditional welding methods. The application of composite materials for ship construction allows decreasing the ship weight by 10%, which leads to 1-7% decrease in fuel consumption, reduction of polluting emissions and significant saving of expenditures. Adhesion-bonded joints become more frequently used in shipbuilding, as they off er a possibility of joining different materials along with the advantages brought by the adhesion process itself, being reliable, cost-efficient and ensuring easy maintenance and repair.
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Darmanto, Seno, Sutanto Sutanto, Sulaiman Sulaiman, and Eko Julianto Sasono. "APLIKASI TEKNOLOGI SEDERHANA DAN PERMESINAN UNTUK MENINGKATKAN KEAHLIAN RENOVASI LAMBUNG PERAHU." J-ABDIPAMAS (Jurnal Pengabdian Kepada Masyarakat) 2, no. 1 (April 25, 2018): 53. http://dx.doi.org/10.30734/j-abdipamas.v2i1.157.
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ABSTRACTApplications of technology and machinery equipment in service activities are done to complete the renovation and repair of boats or wooden vessels. Development of the infrastructure for members of the fishermen group is currently focused on equipment for the repair and renovation of the boat hull and the maintenance of the driving machine. And for the improvement of the renovation or repair of the boat hull, the service team has compiled a working activity including understanding and deepening of boat or wooden boats, engineering and equipment for renovation and boatbuilding, understanding and deepening of ship damage, and implementation in a group of fishermen. The process of maintenance and repair of boats on the ship's body (hull) in fishermen partners in principle were carried out through several stages include the washing and cleaning of all parts of the ship, patching, coating and painting. The process of painting through several stages of surface cleaning, patching if there are starting cracks and holes, drying, smoothing, basic coating and painting. Some tools for boats maintenance and repair especially for renovation and manufacture of wooden boats consist of saws (machines and manuals), drills, fittings, grinders, cutting (various sizes), clamps and other support equipmentKeywords: boat, hull, propulsion machine, machinery ABSTRAKKegiatan pengabdian aplikasi teknologi dan peralatan permesinan dilakukan untuk menyempurnakan renovasi dan perbaikan perahu atau kapal kayu. Pengembangan kelengkapan sarana anggota kelompok nelayan pada saat ini difokuskan pada peralatan untuk perbaikan dan renovasi lambung atau bodi dan perawatan mesin penggerak. Dan untuk penyempurnaan renovasi atau perbaikan kapal kayu, tim pengabdian menyusun langkah kerja atau kegiatan pengabdian meliputi pemahaman dan pendalaman perahu atau kapal kayu, teknik dan peralatan renovasi dan pembuatan perahu, pemahaman dan pendalaman kerusakan kapal, dan sejenisnya dan pelaksanaan di kelompok nelayan. Proses perawatan dan perbaikan kapal pada bagian badan kapal (lambung kapal) di mitra nelayan pada prinsipnya dilakukan melalui beberapa tahapan meliputi pencucian seluruh bagian kapal, penambalan (pemakalan), pendempulan dan pengecetan kapal. Proses pengecatan melalui beberapa tahapan yakni pembersihan permukaan, penambalan kalau ada yang mulai retak dan berlubang, pengeringan, penghalusan, pelapisan dasar dan pengecatan. Beberapa peralatan perawatan dan perbaikan lambung perahu terutama untuk renovasi dan pembuatan perahu kayu meliputi gergaji kayu (mesin dan manual), bor, pasah, gerinda, tatah (berbagai ukuran), clem/pencepit dan peralatan pendukung lain.
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Stevan, Paul, Triwilaswandio Wuruk Pribadi, and Sufian Imam Wahidi. "Computer-Based Android Application for Vessel’s Condition Survey by Owner Surveyor." Applied Mechanics and Materials 874 (January 2018): 165–73. http://dx.doi.org/10.4028/www.scientific.net/amm.874.165.
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Ship condition survey is a survey conducted by an Owner Surveyor for reporting the actual condition of the ship and parts. Presently, the condition survey is still done manually that Owner Surveyor has to survey based on survey list which is published by the ship’s owner company. The survey result will be presented in the form of a report, which will be submitted to ship’s owner as consideration for doing repair and maintenance. The survey process which done presently is not effective and many Owner Surveyors have not sufficient knowledge and experience, and also the process of presenting a survey report which takes a long time. This project was implemented by built an android-based computer application that can assist an Owner Surveyor in the process of a condition survey. This application containes of survey list, survey review, updating survey, and several menus to facilitate Owner Surveyor in the condition survey. This application has been tested by a few respondents who have experience in surveying ships and who have an educational background of naval architecture and shipbuilding engineering. This test was done in the form of a questionnaire aimed to determine the respondents assessment of this application. From the results of the questionnaire could be concluded that the application is very useful in supporting ship condition survey.
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BURSZTYŃSKI, Andrzej. "LOGISTIC ASPECTS OF RESTORING SHIP’S TECHNICAL EFFICIENCY." Scientific Journal of the Military University of Land Forces 158, no. 4 (October 1, 2010): 46–60. http://dx.doi.org/10.5604/01.3001.0002.2725.
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A ship’s combat readiness is significantly dependent on the technical worthiness of basic ship equipment and mechanisms. Technical worthiness is determined by operation rates and depends on the condition of equipment. While using military equipment, one may expect the wear and tear of systems resulting from physical ageing, operation or combat damage. The restoration of ship’s technical efficiency is completed after returning to the harbour or during operations at sea. The tasks of restoring technical efficiency are performed in harbours and in naval bases by ashore elements of the repair system. During operations at sea a crew is able, to a limited extent, to carry out basic technical maintenance. The restoration of the technical worthiness and efficiency of ship equipment depends on appropriate logistic support.
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Kura, Bhaskar, W. Reid Lea, Al Knecht, and Kenneth McManis. "Risk Analysis of the TRI Emissions from the Shipbuilding, Repair, and Maintenance Industry." Journal of Ship Production 14, no. 01 (February 1, 1998): 27–32. http://dx.doi.org/10.5957/jsp.1998.14.1.27.
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The toxics release inventory (TRI) was mandated as a result of the enactment of the Emergency Planning, Community Right-to-Know Act (EPCRA) of 1986. Conceived largely in response to the Bhopal, India disaster in 1984, EPCRA was designed to compel state and local government to plan for unanticipated environmental excursions of hazardous chemicals. The TRI has evolved into a significant tool for regulatory agencies and public interest groups to use in assessing toxic chemical releases to the environment and, by inference, for use as a local indicator of environmental quality. An analysis of the TRI is limited almost exclusively to comparison of the annual discharge of pollutants to different media from year to year. The validity of this type of analysis has been seriously questioned as it fails to address even superficially the toxicity, persistence, and exposure factors arising from the reported releases. This paper explores the use of an adaptive method of scoring the chemical releases taking into consideration human and environmental toxicity and the potential for exposure. The relative risk of typical TRI emissions from the ship building, repair, and maintenance industry are scored and compared to other sources of TRI emissions. A software program for use by the industry to do self-scoring was developed by the Environmental Resources and Information Center (ERIC) at the University of New Orleans
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Lancaster, Frederick A. "Pulsed Semiconductor Diode Lasers as an Environmentally Efficient and Affordable Decoating Method for Shipbuilding and Ship Maintenance." Journal of Ship Production 19, no. 03 (August 1, 2003): 165–78. http://dx.doi.org/10.5957/jsp.2003.19.3.165.
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Coating removal during new ship construction or ship maintenance has traditionally posed environmental and production issues. Coating removal results in a large amount of waste, and other trades cannot work in or near areas where coating removal operations are going on. Hydroblasting, an environmentally friendly method, has significantly decreased in recent years; it cannot be used on interior compartments. The dilemma has been to find a surface-preparation method that is effective yet environmentally acceptable and one that can work on the outer hull as well as on the inside compartments. Further, a method is needed to remove coatings from the new "soft" substrates. Laser devolved over the years from expensive CO2 and Nd:YAG lasers to the recent innovation of using affordable semiconductor diode lasers for coatings removal. Semiconductor diode laser decoating is a nonintrusive, nonkinetic energy process that has successfully removed coatings from a variety of substrates, such as composites, fiberglass, metal, and plastics, in a controlled manner, layer by layer, without damage, leaving the surface ready for immediate repainting. The process is very rapid (up to 400 sq ft per hour), 6 to 10 times faster on average than the present manual hand-sanding methods, and involves a minimal increase in temperature, because the energy is mostly absorbed and utilized in coating decomposition (i.e., instant pyrolization and evaporation). The only waste associated with this process is the ablated coating that is vacuumed from the surface and captured in particle filters, approximately one-third of the amount of coating originally on the surface. Diode lasers are compact, durable for shipbuilding and repair industry use, and present low operating costs. Due to delays in receiving test panels from Navy and commercial ship sources, this paper will highlight data from tests of removal of coatings similar to military epoxy/polyurethane coatings from thin-skin metallic, composite, and fiberglass structures, radome material, and for removing powder coatings. Pulsed high-energy diode laser decoating technology is now commercially and economically available for ship corrosion control and maintenance, can reduce the overall environmental impact of decoating, and can increase productivity of all the ship trades.
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Turan, O., A. İ. Ölçer, I. Lazakis, P. Rigo, and J. D. Caprace. "Maintenance/repair and production-oriented life cycle cost/earning model for ship structural optimisation during conceptual design stage." Ships and Offshore Structures 4, no. 2 (May 21, 2009): 107–25. http://dx.doi.org/10.1080/17445300802564220.
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Widyantoro, Muhamad, Agus Subardi, and Dori. "Pengaruh Kerusakan Jack Hydraulic di Atas Kapal." Dinamika Bahari 1, no. 1 (May 29, 2020): 45–52. http://dx.doi.org/10.46484/db.v1i1.183.
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Sea transportation is seen as the most effective means of responding to the high demand for a commodity. The development of industry 4.0 and society 5.0 has a big influence on the economic growth of a country. Loading and unloading must go well, so efforts are needed to ensure its implementation. Delay in unloading due to hydraulic leakage. The captain and guard officer as more experienced parties are expected to make efforts to prevent it. Coordinating work when unloading shows that the ship has followed procedures and efforts to repair hydraulic leaks. The method used by researchers to analyze problems is the fishbone analysis method. Research data obtained from primary data and secondary data, while data collection was obtained from observations, interviews, descriptive and literature. Fishbone analysis aims as an effort made to change the data from the results of a study into simpler information, so that it is easy to use to draw conclusions. Based on the results of this study, hydraulic maintenance was further improved and procurement of spare parts continued to be pursued by the ship. In addition, the company's management also affects the performance of the crew on the ship so that there is a need for improvement in the company's management of the ship.
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Reeve, Henry P., and Robert G. Bea. "SQIS: A Framework for the Development and Implementation of an Industry-Wide Ship Quality Information System." Marine Technology and SNAME News 36, no. 02 (April 1, 1999): 92–101. http://dx.doi.org/10.5957/mt1.1999.36.2.92.
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The Ship Structural Integrity Information System Phase III (SSIIS III) Project presents the framework for the development of an Industry-Wide Ship Quality Information System (SQIS) for use in the United States oil tanker trade. This full-scope, life-cycle, industry-wide information system provides the basis for the development of risk based inspection, maintenance, and repair (IMR) activity management tools, intended to supplement those in development by industry members. The SQIS combines information concerning structures, machinery, and operations, and provides analysis of the links between all facets of vessel management. The cooperation of all sectors of the marine community is paramount to the successful implementation of a Industry-Wide SQIS. The recommendations and requirements of interested parties have been incorporated into the development of the SQIS framework. The organizational requirements for the development and implementation of the full scale Industry-Wide SQIS have been identified.
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Ochoa, Carlos, Henry Murcia, Raúl Fuciños, and Karen Domínguez. "New implementation of Work Sampling Analysis for validating the Present Idle Time Indicator of Maintenance and Ship Repairing Business Line of Cotecmar." Ciencia y tecnología de buques 10, no. 20 (January 30, 2017): 9. http://dx.doi.org/10.25043/19098642.145.
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This article is focused on the implementation of the Work Sampling technique at the Science and Technology Corporation for the development of the Naval, Maritime and Riverine Industry – COTECMAR, more specifically in the Production Department of the Maintenance and Ship Repair Management located in Mamonal facilities; in order to know the percentage of idle times in performed productive processes and to identify the main triggers, through the estimation of the proportion of time played in specifics activities in a certain period of time, using instantaneous observations of work areas and employing probability sampling to generalize the findings.
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Daki, Olena. "Automation of Processes of Maintenance and Repair of River Vessels Using Methods of Production Logistics." Central Ukrainian Scientific Bulletin. Technical Sciences, no. 3(34) (October 2020): 351–57. http://dx.doi.org/10.32515/2664-262x.2020.3(34).351-357.
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The article is devoted to the development of models for automation of maintenance and repair of river vessels using the methods of production logistics, as well as to determine the role of production logistics in solving the problem of maintenance and repair of vessels. Achieving this goal contributes to solving a number of problems of modern enterprise management. The research presented in the article is based on the work of domestic and foreign researchers. The production process is a set of interdependent actions of people, means of production and nature, necessary for the manufacture of products. The main component of the production process is the technological process - a set of actions to change and determine the state of the object of labor. Various production processes are carried out at the enterprises. Flow production is a highly efficient method of organizing the production process. Under the conditions of the flow, the production process is carried out in maximum accordance with the principles of its rational organization. In the conditions of crisis phenomena in the domestic economy, the fall of industrial production for ship repair enterprises, the question of replacing scarce and expensive materials for the organization of production, as well as rationing and careful use of existing materials became acute. Comprehensive automation of production processes leads to increased efficiency of the enterprise, especially at the stage of planning and determining the needs for materials, components, units, both own production and purchased. The application of production planning principles is very important for solving a number of problems related to the maintenance and repair of river vessels. Ways to solve this problem lie in the planes: reorientation of procurement in the domestic market; planning own production of scarce and expensive products for production needs; use of scientific methods of material flow organization using the principles of production logistics.
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Xu, T., and R. G. Bea. "Fatigue of Ship Critical Structural Details." Journal of Offshore Mechanics and Arctic Engineering 119, no. 2 (May 1, 1997): 96–107. http://dx.doi.org/10.1115/1.2829059.
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During the past six years, a joint government-industry-sponsored project titled Ship Structural Maintenance Project (SMP) has been conducted at the University of California at Berkeley. As part of the SMP, fatigue of ship critical structural details (CSD) has been studied. This paper summarizes developments in the stress range—number of cycles to failure (SN) analysis developed during the SMP. Nominal stress and hot spot stress procedures were employed to evaluate fatigue damage to ship CSD. A “cracked SN curve” approach was developed based on a hybrid SN-FM (fracture mechanics) methodology to evaluate the residual life of cracked ship CSD. The fatigue durability characteristics of repaired CSD was studied. Numerical examples are presented to illustrate these developments.
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Yuksel, Yalcin, Selahattin Kayhan, Yesim Celikoglu, and Kubilay Cihan. "OPEN TYPE QUAY STRUCTURES UNDER PROPELLER JETS." Coastal Engineering Proceedings 1, no. 33 (October 11, 2012): 19. http://dx.doi.org/10.9753/icce.v33.structures.19.
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In recent years, dramatically increases in ship dimensions and installed engine power, introduction of new type of special purpose ships and use of roll-on/roll-of, ferries, container ships can cause damage which in many cases threatens to undermine berth structures. Vessel jets of these types of ships can change flow area and cause erosion and scour around foundation of berth structures. Due to the damages in berth structures maintenance and repair cost may increase and also cause management losses. For this reason vessel jet induced the flow area around the berth structures during ships berthing and un-berthing operations are extremely important factor for the port structure design. This study is related with investigation of the flow characteristics at the sea bed around the pile, experimentally. Vessel jets were simulated both as circular wall jet and also propeller jet. The objective of this study is to determine the sea bed shear stress and velocity profiles along the jet axis for open type wharf structures (around a cylindrical piles and also on the slopes). Hot film anemometers were used to measure the magnitude of the bed shear stresses. The results from propeller jet experiments explained the erosion over the slopes. Bed shear and velocity profile measurements were carried out on the rigid bed conditions.
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Kambase, Nicholas Nchor. "Ship Maintenance and Repair Services in the Tema Drydock and Shipbuilding Yard in Ghana: Some Challenges, Opportunities and Prospects." World Journal of Engineering and Technology 08, no. 03 (2020): 296–316. http://dx.doi.org/10.4236/wjet.2020.83024.
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Sinaga, Yulifa Esfana Putri, Garuda Ginting, and Melda Panjaitan. "Penerapan Data Mining Dalam Meningkatkan Mutu Perawatan dan Perbaikan Perlengkapan Alat-Alat Kapal Laut Menerapkan Metode K-Means Clustering." Jurnal Sistem Komputer dan Informatika (JSON) 2, no. 3 (May 30, 2021): 232. http://dx.doi.org/10.30865/json.v2i3.2626.
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This study aims to propose in carrying out sailing activities on the KN. Arcturus ship every week, so that maintenance and maintenance activities need to be carried out properly and scheduled so as not to interfere with ongoing production activities. The current machine breakdown is still relatively high and requires a long repair time, what is proposed is preventive maintenance using the Clustering technique. The method used is K-Means Clustering. By using this method, the data that has been obtained can be grouped into several clusters, based on the similarity of these data, so that data that has the same characteristics are grouped into one cluster and those that have different characteristics are grouped into another cluster. We can use the abundance of data to find hidden information from these data. In order to find out the hidden information from these data, it is necessary to process the data. The data processing process is also known as data mining. With this grouping it will know the results of the analyzed data.
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Avdeyev, Boris Aleksandrovich, and Alexei Viktorovich Vyngra. "Examining efficient treatment of parts during ship repair with cutting fluids cleaning in magnetic sump." Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2020, no. 2 (May 22, 2020): 22–29. http://dx.doi.org/10.24143/2073-1574-2020-2-22-29.
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The article considers the problem of cleaning efficiency of cutting fluids used in the technological processes of parts treatment during ship repair. One of the cleaning instruments is a magnetic sump which has a high efficiency at a relatively low cost of operation and maintenance. The laboratory tests of the magnetic sump were carried out using a full-factor experiment, with changing certain parameters in order to identify the coolant purity index when cleaning from mechanical impurities. The dependencies are obtained that connect the value of the coolant purity index with the technological and construction parameters of the magnetic sump. The influence of the coolant purity index in the magnetic sump on the roughness of the polished surface of the samples was revealed. With a decreasing concentration of solids after cleaning in a magnetic sump, the surface roughness parameter of the samples decreases from 0.8 to 0.2 μm. The most rational parameters of the magnetic sump have been determined, at which the optimal surface roughness is observed when processing the engine crankshaft using coolant cleaned in a magnetic sump. The scheme of the experimental facility has been presented to determine the efficiency of cleaning the cutting fluid from the mechanical impurities in a magnetic sump, which includes a LATR adjustment transformer, a 220 / 12V step-down transformer, a voltmeter, an ammeter, a rectifier diode unit, and a magnetic sump. It has been stated that the errors of the presented experimental and calculated dependences did not exceed 10%. It has been inferred that cleaning the cutting fluid in the magnetic sump to maximum values allows increasing the intervals of machine time between cleaning the circle up to 70%.
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Plouviez, David. "The maintenance, repair and construction of ships in the French Empire during the eighteenth century." International Journal of Maritime History 31, no. 3 (August 2019): 590–611. http://dx.doi.org/10.1177/0843871419862159.
Full textAbstract:
The history of maritime trade has been the subject of considerable research since the 1950s, but the technical artefacts of this trade have not received the attention they deserve. While historians have paid plenty attention to ships – their features, tonnage, etc. – and port infrastructure overseas, the issues relating to naval repair and construction in the Empires have rarely attracted interest. However, this is a key factor in understanding the dynamics of trade, which encompasses the interplay between economic history, social history and the history of technology. Drawing on the example of the French Empire, this article aims to provide a first approach to this economy of maintenance, repair and shipbuilding overseas. The first step is to identify the places where these complex tasks were carried out and to establish the temporality of equipment in overseas ports. Did the French Empire offer a network of ports equipped to maintain, repair and build ships? What equipment does this include? But while the question of infrastructure is crucial, insofar as it raises other issues related to the role of the State and its relationship with economic stakeholders, it is also essential to consider that a significant share of maintenance, repair and construction tasks were not associated with any specific infrastructure. The question of knowledge, know-how and their exchange within the Empires is also important and is the subject of the second part of this article. The aim is to demonstrate that the identification and breakdown of shipbuilding workers, the establishment of their occupational mobility and the technical discussions they engaged in with other Europeans, settlers or natives, provide challenging research opportunities that may help us to understand the maintenance, repair and construction of ships in the Empires.
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Guedes Soares, C., and Y. Garbatov. "Reliability of Corrosion Protected and Maintained Ship Hulls Subjected to Corrosion and Fatigue." Journal of Ship Research 43, no. 02 (June 1, 1999): 65–78. http://dx.doi.org/10.5957/jsr.1999.43.2.65.
Full textAbstract:
A formulation is presented for the assessment of the reliability of a ship hull with respect to failure of the longitudinal members as a result of fatigue and corrosion. The model allows for the existence of multiple cracks and it accounts for the crack growth process. The midship section modulus is described by a stochastic process A new model is presented for the effect of corrosion, which is a time-dependent process with two stages. In the first one, there is no corrosion due to the existence of coating protection. Upon failure of the protection system, general corrosion decreases plate thickness and affects the midship section modulus. The inspection is modeled as a random process. One repair policy is considered in the example, which consists of plate replacement when its thickness reaches 75% of the original thickness. The time-dependent degrading effect of corrosion and crack growth are modeled as a random process also. The reliability is predicted by a time variant formulation and the effects of maintenance actions in increasing the reliability are shown. The sensitivity of the reliability estimates with respect to several parameters is also studied. The formulation has been applied to a tanker.
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Aijazi, A. K., L. Malaterre, M. L. Tazir, L. Trassoudaine, and P. Checchin. "DETECTING AND ANALYZING CORROSION SPOTS ON THE HULL OF LARGE MARINE VESSELS USING COLORED 3D LIDAR POINT CLOUDS." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences III-3 (June 3, 2016): 153–60. http://dx.doi.org/10.5194/isprs-annals-iii-3-153-2016.
Full textAbstract:
This work presents a new method that automatically detects and analyzes surface defects such as corrosion spots of different shapes and sizes, on large ship hulls. In the proposed method several scans from different positions and viewing angles around the ship are registered together to form a complete 3D point cloud. The <i>R</i>, <i>G</i>, <i>B</i> values associated with each scan, obtained with the help of an integrated camera are converted into HSV space to separate out the illumination invariant color component from the intensity. Using this color component, different surface defects such as corrosion spots of different shapes and sizes are automatically detected, within a selected zone, using two different methods depending upon the level of corrosion/defects. The first method relies on a histogram based distribution whereas the second on adaptive thresholds. The detected corrosion spots are then analyzed and quantified to help better plan and estimate the cost of repair and maintenance. Results are evaluated on real data using different standard evaluation metrics to demonstrate the efficacy as well as the technical strength of the proposed method.