Journal articles: 'Preliminary ship design'

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Karczewski, Artur, and Janusz Kozak. "Variants method approach to the preliminary ship design." Mechanik 90, no. 12 (December 11, 2017): 1196–98. http://dx.doi.org/10.17814/mechanik.2017.12.206.

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Typical ship designing is an iterative method based on the accumulated experience of already built ships. In the case of a completely new type of ship, without the „dowry of previous experience”, the design consists in developing a series of parallel variant solutions using the optimization. The paper identifies selected designing methods applying the optimizations used in the preliminary ship design. The optimization methods used in the ship design are discussed.

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Clausen, H. B., M. Lu¨tzen, A. Friis-Hansen, and N. Bjørneboe. "Bayesian and Neural Networks for Preliminary Ship Design." Marine Technology and SNAME News 38, no. 04 (October 1, 2001): 268–77. http://dx.doi.org/10.5957/mt1.2001.38.4.268.

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To ease the determination of the main particulars of a ship at the initial design stage it is convenient to have tools which, given the type of ship and a few other parameters, output estimations of the remaining dimensions. To establish such a tool, a database of the characteristics of about 87 000 ships is acquired and various methods for derivation of empirical relations are employed. A regression analysis is carried out to fit functions to the data. Further, the data are used to learn Bayesian and neural networks to encode the relations between the characteristics. On the basis of examples, the three methods are evaluated in terms of accuracy and limitations of use. For different types of ships, the methods provide information on the relations between length, breadth, height, draft, speed, displacement, block coefficient and loading capacity. Thus, useful tools are available to the designer when he chooses the preliminary main characteristics of a ship.

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Kupras, L. K., and H. van Keimpema. "Microcomputer aids preliminary ship design." International Shipbuilding Progress 32, no. 368 (April 1, 1985): 99–110. http://dx.doi.org/10.3233/isp-1985-3236803.

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Yilmaz, Hüseyin, and Abdi Kükner. "An Approximate Method for Intact Stability of Fishing Vessels." Marine Technology and SNAME News 36, no. 03 (July 1, 1999): 171–74. http://dx.doi.org/10.5957/mt1.1999.36.3.171.

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It is well known that stability is the most important safety requirement for ships. One should have some information on ship stability at the preliminary design stage in order to reduce risk. Initial stability of ships is an important criterion and can be closely evaluated in terms of form parameters and vertical center of gravity. In this study, using some sample ship data, approximate formulations are derived by means of regression analysis for the calculations expressed in terms of ship preliminary design parameters that can easily provide approximate GM calculations. Thus designers can be provided with ship stability at the preliminary design stage, and also a set of appropriate design parameters for improving vessel stability can easily be determined.

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Karczewski, Artur, and Janusz Kozak. "Variant Designing in the Preliminary Small Ship Design Process." Polish Maritime Research 24, no. 2 (June 27, 2017): 77–82. http://dx.doi.org/10.1515/pomr-2017-0052.

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Abstract Ship designing is a complex process, as the ship itself is a complex, technical multi-level object which operates in the air/water boundary environment and is exposed to the action of many different external and internal factors resulting from the adopted technical solutions, type of operation, and environmental conditions. A traditional ship design process consists of a series of subsequent multistage iterations, which gradually increase the design identification level. The paper presents problems related to the design of a small untypical vessel with the aid of variant methodology making use of optimisation algorithms. The computer-aided design methodology has been developed which does not need permanent reference to already built real ships and empirical-statistical relations. Possibilities were indicated for integrating together early design stages, and parallel designing of hull shape and parameters.

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Meler-Kapcia, Maria. "Algorithm for searching out similar ships within expert system of computer aided preliminary design of ship power plant." Polish Maritime Research 15, no. 3 (October 1, 2008): 92–96. http://dx.doi.org/10.2478/v10012-007-0089-7.

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Algorithm for searching out similar ships within expert system of computer aided preliminary design of ship power plant This paper presents an algorithm for searching out similar ships, implemented in a hybrid system for aiding preliminary design of ship power plant, based on new similarity functions as well as those adapted from literature sources. For searching out similar ships a multicriterial optimization method of weighed profits was applied.

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Pawling, Richard, and David Andrews. "Design Sketching for Computer Aided Preliminary Ship Design." Ship Technology Research 58, no. 3 (September 2011): 182–94. http://dx.doi.org/10.1179/str.2011.58.3.006.

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Abramowski, Tomasz, Tomasz Cepowski, and Peter Zvolenský. "Determination of Regression Formulas for Key Design Characteristics of Container Ships at Preliminary Design Stage." New Trends in Production Engineering 1, no. 1 (October 1, 2018): 247–57. http://dx.doi.org/10.2478/ntpe-2018-0031.

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Abstract This article presents regression equations to estimate container ship design characteristics based on the most up-to-date data and deadweight capacity, the number of containers and their combination at the preliminary design stage. These design formulas could have application for the estimation of key container ship characteristics such as: main ship dimensions, geometric parameters, main engine total power, ship velocity, final price and others. Regression equations were performed on the basis of IHS Maritime & Trade main container ship data built from 2005-2015. All equations presented in this paper could have practical application at the preliminary design stage and increase ship design theory development.

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Michalski, Jan. "A method for selection of parameters of ship propulsion system fitted with compromise screw propeller." Polish Maritime Research 14, no. 4 (October 1, 2007): 3–6. http://dx.doi.org/10.2478/v10012-007-0032-y.

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A method for selection of parameters of ship propulsion system fitted with compromise screw propeller This paper concerns an algorithmic method for preliminary selection of parameters of ship propulsion system fitted with fixed screw propeller in the case when the ship's operation is associated with significant changes of waterway depth and width, hull resistance of the ship and its service speed. Mathematical model arguments of the considered design problem are main ship design parameters identified in the preliminary design stage. Structure of the formulated model complies with formal requirements for continuous- discrete mathematical optimization problems. The presented examples of application of the method concern an inland waterways ship fitted with compromise screw propeller optimized in the sense of minimization of fuel consumption for passing a given route distance within a given time. The elaborated method may be especially useful in designing such ships as: coasters, inland waterways ships, tugs, pushers, trawlers, mine sweepers, icebreakers etc.

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Cepowski, Tomasz. "Prediction of the Main Engine Power of a New Container Ship at the Preliminary Design Stage." Management Systems in Production Engineering 25, no. 2 (June 1, 2017): 97–99. http://dx.doi.org/10.1515/mspe-2017-0014.

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Abstract The paper presents mathematical relationships that allow us to forecast the estimated main engine power of new container ships, based on data concerning vessels built in 2005-2015. The presented approximations allow us to estimate the engine power based on the length between perpendiculars and the number of containers the ship will carry. The approximations were developed using simple linear regression and multivariate linear regression analysis. The presented relations have practical application for estimation of container ship engine power needed in preliminary parametric design of the ship. It follows from the above that the use of multiple linear regression to predict the main engine power of a container ship brings more accurate solutions than simple linear regression.

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Bortnowska, Monika. "Research on preliminary concept of ship intended for mining poly-metallic concretions from sea bed." Polish Maritime Research 15, no. 1 (January 1, 2008): 29–36. http://dx.doi.org/10.2478/v10012-007-0048-3.

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Research on preliminary concept of ship intended for mining poly-metallic concretions from sea bed Necessity to design and build a ship for winning Fe-Mn concretions from sea bed, and put it into operation, results mainly from decreasing land resources of mineral rough materials and increasing prices of metals. Main dimensions and parameters of such mining ship were determined by elaborating its main design assumptions and making use of suitable data on drilling ships considered similar from the point of view of attributed functions and spatial arrangement. In this paper a design study on preliminary concept of dimensions and spatial arrangement of a ship for winning poly-metallic concretions from sea bed, is presented. The study has been aimed at elaboration of an appropriate mathematical model to be applied for optimization of ship's winning system.

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Akagi, Shinsuke, and Kikuo Fujita. "Building an expert system for the preliminary design of ships." Artificial Intelligence for Engineering Design, Analysis and Manufacturing 1, no. 3 (August 1987): 191–205. http://dx.doi.org/10.1017/s0890060400000287.

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An expert system for the preliminary design of ships developed. The design process is understood as determining design variables and the relationships among design parameters. The relationships among the elements of design knowledge are represented by a network model. The object-oriented knowledge representations are introduced in the computer system to manipulate design variables such as the principle particulars of a ship in the network model. The expert system based on the above concept provides the following functions: (1) flexibility for building a model and easy modification of the model; (2) effective diagnosis of the design process by using rule-based knowledge representations; (3) hybrid function with both symbolic treatment of the design knowledge and numerical computations by coupling the systems programmed in LISP and FORTRAN and (4) a supporting method for determination of the design variables.Finally the system's validity and effectiveness is ascertained by applying it to the preliminary design of a bulk carrier ship.

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Lee, Kyu-Yeul, and Sang-Uk Lee. "An agent-based approach to preliminary ship design." Journal of Marine Science and Technology 5, no. 2 (December 31, 2000): 78–88. http://dx.doi.org/10.1007/s007730070013.

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Lee, Dongkon, Kyung-Ho Lee, and Soon-Hung Han. "Intelligent Selection of Main Engine at the Preliminary Design Stage of Ships." Journal of Ship Production 11, no. 04 (November 1, 1995): 245–51. http://dx.doi.org/10.5957/jsp.1995.11.4.245.

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The propulsion system is one of the most complicated systems in a ship and its performance greatly depends on the selection of the main engine. Also, the propulsion system occupies a large portion of the total shipbuilding cost, as well as a large portion of the annual operating cost in fuel consumption. Selecting the right propulsion system is an important factor consideration for shipowners and designers. In the preliminary stage of ship design, the main engine is selected by a design expert and this usually is a difficult task for a novice designer. With the help of a design support system, efficiency in selecting the right engine can be increased. In this study, a knowledge-based system for engine selection which can be used in the preliminary design stage for a merchant ship has been developed. The knowledge base is constructed using heuristic knowledge acquired from design experts. Two databases of engine catalogs and of existing ships are also constructed. Various performance prediction modules of the domain of naval architecture are integrated with the knowledge bases and databases. To enhance the user interface, a graphical user interface (GUI) built upon the Motif widgets is adapted.

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Huang, Jing Feng. "A Ship General Integrated Design Platform Based on Digital Ship." Advanced Materials Research 479-481 (February 2012): 2504–10. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.2504.

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A ship general design platform is established in order to satisfy the requirement integrating design, analysis and optimization in ship design process. A design-analysis unified connected model is developed based on digital ship idea and a ship general design platform frame system is formed based on the template technology. In the preliminary application process, a design tool database and an applicative template database are established. That the reliability proves to be good is significant for promoting traditional design method and improving design efficiency.

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Wilkins, James R., Perry Singh, and Todd Cary. "Generic Build Strategy—A Preliminary Design Experience." Journal of Ship Production 12, no. 01 (February 1, 1996): 11–19. http://dx.doi.org/10.5957/jsp.1996.12.1.11.

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From the very inception of the preliminary design phase of the U.S. Navy's new amphibious assault ship, which at the time was designated only as the LX, there has been an emphasis on generating a design which is producible—one that requires a minimum of redesign by the building yard and which can be built efficiently using modern ship construction techniques. This emphasis resulted in establishment of a Producibility Task Manager as a member of the LX Preliminary Design Team and in the creation of a Product-Oriented Design And Construction (PODAC) Working Group. The functions of this Group were to mimic a shipyard production planning effort and to interact with the design team on a regular basis. This paper describes the results of their efforts, including the development of a Generic Build Strategy and numerous Design for Producibility improvements during the LX Preliminary Design Phase.

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Cepowski, Tomasz. "Approximation of the index for assessing ship sea-keeping performance on the basis of ship design parameters." Polish Maritime Research 14, no. 3 (July 1, 2007): 21–26. http://dx.doi.org/10.2478/v10012-007-0014-0.

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Approximation of the index for assessing ship sea-keeping performance on the basis of ship design parameters This paper presents a new approach which makes it possible to take into account seakeeping qualities of ship in the preliminary stage of its design. The presented concept is based on representing ship's behaviour in waves by means of the so called operational effectiveness index. Presented values of the index were calculated for a broad range of design parameters. On this basis were elaborated analytical functions which approximate the index depending on ship design parameters. Also, example approximations of the index calculated by using artificial neural networks, are attached. The presented approach may find application to ship preliminary design problems as well as in ship service stage to assess sea-keeping performance of a ship before its departure to sea.

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Mackney, Michael D. A., and Carl T. F. Ross. "Preliminary Ship Design Using One and Two-Dimensional Models." Marine Technology and SNAME News 36, no. 02 (April 1, 1999): 102–12. http://dx.doi.org/10.5957/mt1.1999.36.2.102.

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Computational studies of hull-superstructure interaction were carried out using one-, two-and three-dimensional finite element analyses. Simplification of the original three-dimensional cases to one- and two-dimensional ones was undertaken to reduce the data preparation and computer solution times in an extensive parametric study. Both the one- and two-dimensional models were evaluated from numerical and experimental studies of the three-dimensional arrangements of hull and superstructure. One-dimensional analysis used a simple beam finite element with appropriately changed sections properties at stations where superstructures existed. Two-dimensional analysis used a four node, first order quadrilateral, isoparametric plane elasticity finite element, with a corresponding increase in the grid domain where the superstructure existed. Changes in the thickness property reflected deck stiffness. This model was essentially a multi-flanged beam with the shear webs representing the hull and superstructure sides, and the flanges representing the decks One-dimensional models consistently and uniformly underestimated the three-dimensional behaviour, but were fast to create and run. Two-dimensional models were also consistent in their assessment, and considerably closer in predicting the actual behaviours. These models took longer to create than the one-dimensional, but ran in very much less time than the refined three-dimensional finite element models Parametric insights were accomplished quickly and effectively with the simplest model and processor, but two-dimensional analyses achieved closer absolute measure of the displacement behaviours. Although only static analysis with simple loading and support conditions were presented, it is believed that similar benefits would be found for other loadings and support conditions. Other engineering components and structures may benefit from similarly judged simplification using one- and two-dimensional models to reduce the time and cost of preliminary design.

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Duffy, A. H. B., and K. J. MacCallum. "Computer Representation of Numerical Expertise for Preliminary Ship Design." Marine Technology and SNAME News 26, no. 04 (October 1, 1989): 289–302. http://dx.doi.org/10.5957/mt1.1989.26.4.289.

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In the early stages of ship design a considerable amount of experience and knowledge is used to build and evaluate empirical models with known design relationships. However, computer-based systems which aim to assist this stage have tended to concentrate on the analytical aspects of the process and have not been successful in integrating with this expertise and benefitting from it. This paper presents some of the results of a program of research into methods and representing knowledge of empirical numerical relationships used in these early stages of the design process. The work is based on an experimental system, DESIGNER, described in earlier papers. The DESIGNER system is used to carry out a series of evaluations of design sessions, using a warship design model. By examining the progress toward a set of design goals and the classes of interactions used, an improved understanding of the requirements of an interactive numerical design system is developed. As a consequence, methods have been developed to handle approximate values and relationships, to include design margins, and to represent explicitly in the system the definition and use of goals, or design requirements. Using a design model representing a bulk carrier, the paper then presents a worked example to illustrate the use of the new numerical knowledge techniques. It is concluded that the techniques could make a useful contribution to any interactive numerical design system which aims to provide improved use of expertise.

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Tan, Xiang, Jidong Tao, and Dimitrios Konovessis. "Preliminary design of a tanker ship in the context of collision-induced environmental-risk-based ship design." Ocean Engineering 181 (June 2019): 185–97. http://dx.doi.org/10.1016/j.oceaneng.2019.04.003.

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Mohamad Ayob, Ahmad F., Ahmad F. Mohamad Ayob, Tapabrata Ray, and Warren Smith. "A Hydrodynamic Preliminary Design Optimization Framework for High Speed Planing Craft." Journal of Ship Research 56, no. 01 (March 1, 2012): 35–47. http://dx.doi.org/10.5957/jsr.2012.56.1.35.

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Ship design optimization in preliminary design stage aims to identify optimum vessel dimensions based on performance targets and design constraints simultaneously. Although vast amount of designs have been generated and evaluated since the application of optimization approaches to ship design, only a few of such designs have been built or "dissected" to gain a deeper understanding as to why such designs tend to be optimal. In this paper an optimization framework is introduced for the design of high speed planing craft, which consists of a geometry module, standard performance estimates, and a suite of state-of-the-art optimization algorithms. Single and multiobjective optimization problem formulations are solved using the framework. Designs identified through the process of optimization are further analyzed to uncover relationships among the design variables that lead to better designs. An important contribution of this paper is to illustrate the steps involved in deriving pseudo performance estimates and their utility in the context of preliminary design where such relationships can be effectively and efficiently used to sieve through a large number of designs.

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Michalski, Jan P. "Parametrical Method for Determining Optimal Ship Carrying Capacity and Performance of Handling Equipment." Polish Maritime Research 23, no. 2 (April 1, 2016): 19–24. http://dx.doi.org/10.1515/pomr-2016-0016.

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Abstract The paper presents a method of evaluating the optimal value of the cargo ships deadweight and the coupled optimal value of cargo handling capacity. The method may be useful at the stage of establishing the main owners requirements concerning the ship design parameters as well as for choosing a proper second hand ship for a given transportation task. The deadweight and the capacity are determined on the basis of a selected economic measure of the transport effectiveness of ship – the Required Freight Rate. The mathematical model of the problem is of a deterministic character and the simplifying assumptions are justified for ships operating in the liner trade. The assumptions are so selected that solution of the problem is obtained in analytical closed form. The presented method can be useful for application in the preliminary ship design or in the simulation of pre-investment transportation task studies.

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Żelazny, Katarzyna. "An Approximate Method for Calculation of Mean Statistical Value of Ship Service Speed on a Given Shipping Line , Useful in Preliminary Design Stage." Polish Maritime Research 22, no. 1 (January 1, 2015): 28–35. http://dx.doi.org/10.1515/pomr-2015-0005.

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Abstract During ship design, its service speed is one of the crucial parameters which decide on future economic effects. As sufficiently exact calculation methods applicable to preliminary design stage are lacking the so called contract speed which a ship reaches in calm water is usually applied. In the paper [11] a parametric method for calculation of total ship resistance in actual weather conditions (wind, waves, sea current), was presented. This paper presents a parametric model of ship propulsion system (screw propeller - propulsion engine) as well as a calculation method, based on both models, of mean statistical value of ship service speed in seasonal weather conditions occurring on shipping lines. The method makes use of only basic design parameters and may be applied in preliminary design stage.

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Bortnowska, Monika. "Prediction of power demand for ship motion control system of sea mining ship fitted with tubular winning system." Polish Maritime Research 14, no. 4 (October 1, 2007): 24–30. http://dx.doi.org/10.2478/v10012-007-0036-7.

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Prediction of power demand for ship motion control system of sea mining ship fitted with tubular winning system One of the crucial systems of sea mining ship for poly-metallic concretions is its motion control system (SMC). Power of such system depends on sea environment characteristics and main dimensions of the ship. It can be expected that it will have important influence on total power of the ship's power plant and in effect on the mining ship's dimensions. In this paper is presented one of the possible ways of preliminary estimation of design power of SMC system for sea mining ship. Since details of design solution of such system for the ship in question are unknown (ships of the kind have not been built so far) the presented results should be considered to be the first estimation of the order of the power demand.

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Martić, Ivana, Nastia Degiuli, Dubravko Majetić, and Andrea Farkas. "Artificial Neural Network Model for the Evaluation of Added Resistance of Container Ships in Head Waves." Journal of Marine Science and Engineering 9, no. 8 (July 30, 2021): 826. http://dx.doi.org/10.3390/jmse9080826.

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The decrease in ship added resistance in waves fits into both the technical and operational measures proposed by the IMO to reduce the emissions of harmful gases from ships. Namely, the added resistance in waves causes an increase in fuel consumption and the emission of harmful gases in order for the ship to maintain the design speed, especially in more severe sea states. For this reason, it is very important to estimate the added resistance in waves with sufficient accuracy in the preliminary design phase. In this paper, the possibility of applying an ANN to evaluate added resistance in waves at the different sea states that the ship will encounter during navigation is investigated. A numerical model, based on the results of hydrodynamic calculations in head waves, and ANN is developed. The model can estimate the added resistance of container ships with sufficient accuracy, based on the ship characteristics, sailing speed, and the sea state using two wave energy spectra.

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Hou, Yuan Hang, Jia Ning Zhang, and Chun Bo Zhen. "Development of Naval Ship Synthesis Model in Concept Design." Advanced Materials Research 945-949 (June 2014): 490–93. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.490.

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Naval ship concept design is required not only accurately evaluating the feasibility of projects, but also optimize the technology indexes based on certain algorithm. That means at the foundation of appropriate technology indexes, the cost and risk can be optimized to obtain the preliminary overall project, which can be the design baseline for the subsequent design. The establishing and application pattern of naval ship synthesis model will be discussed in this paper firstly, and overview the development of ship synthesis model for about half the century. Some achievements will be introduced then, which included the key technology indexes, that aiming at the technology supports to the naval ship projects design work in domestic.

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Majumder, M., A. Akinturk, and S. M. Çalisal. "Optimized Design of Small Craft." Marine Technology and SNAME News 39, no. 02 (April 1, 2002): 67–76. http://dx.doi.org/10.5957/mt1.2002.39.2.67.

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The preliminary design of a small craft can be computerized by a formulation based on optimization, and new design nodes such as crew safety or acceleration levels can be included in the preliminary design (Akinturk 1997). In addition, it is shown that an integrated technical computing environment, such as MATLAB, can be used for the preliminary small craft design, and ergonomic criteria can be included in the design process. This design process, referred to in the text as "MATSHIP," can be easily implemented in design offices. In addition to the preliminary design parameters, which MATSHIP calculates, it obtains a new operational parameter for the permissible ship speed in a sea state for a set ceiling level of crew safety.

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Das, Biman, and Navin Tejpal. "Major Factors Affecting Tugboat Ship Design and Construction." Journal of Ship Production 24, no. 04 (November 1, 2008): 214–20. http://dx.doi.org/10.5957/jsp.2008.24.4.214.

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Tugboat shipbuilding activities and costs were studied with a view to deal with the ship design and development problems and to suggest possible solutions. The lack of communication among shipyard design engineers, vendors, regulatory authority personnel, and shipyard construction department managers at the start of the preliminary and detail drawings gave rise to errors in material specifications in design drawings. This caused the shipyard a significant amount of rework on drawings, resulting in wasted labor costs and lengthening of the shipbuilding cycle time. The timely and correct vendor-furnished information (VFI) on material specification, while preparing the preliminary and detailed drawings, would permit the elimination/ reduction of errors and changes made in the drawings. A medium-sized tugboat ship costs about $14 million, comprising about $5 million labor cost and about $9 million of construction material cost. The completion time for this kind of vessel ranges from 28 to 38 months. It would be possible to reduce the labor and material costs and completion time substantially with adequate and timely information of material re- quirements from the vendor through VFI. Management tools and techniques, such as concurrent engineering, computer simulation, and program evaluation review technique (PERT) could be applied advantageously to improve tugboat shipbuilding de- sign and development productivity.

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Park, Chang-Kue, Young-Soon Yang, and Sang-Woo Pyo. "A Study on the Application of FBS Design Model to Preliminary Ship Design." Journal of the Society of Naval Architects of Korea 45, no. 2 (April 20, 2008): 192–201. http://dx.doi.org/10.3744/snak.2008.45.2.192.

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Cepowski, Tomasz. "Modelling of green water ingress into holds of an open-top containership in its preliminary design phase." Polish Maritime Research 16, no. 1 (January 1, 2009): 3–7. http://dx.doi.org/10.2478/v10012-008-0003-y.

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Modelling of green water ingress into holds of an open-top containership in its preliminary design phase In this paper a method is presented of modelling the green water ingress into holds of open-top containership, which can be useful in the preliminary ship design phase. As a result of the research a mathematical formula which makes it possible to determine a minimum freeboard height with a view of as- low- as- possible occurrence rate of green water ingress into holds at given ship design parameters, was obtained. The research was carried out under assumption of constant ship hull dimensions. The design formula was elaborated by using a method based on a goal-oriented conceptual approach to formulation of design criteria, proposed by IMO. On the basis of the concept a deterministic scenario describing operational conditions of the ship in question, was assumed, and for the conditions the research was performed.

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Szelangiewicz, Tadeusz, and Atarzyna Żelazny. "Prediction Power Propulsion of the Ship at the Stage of Preliminary Design Part II: Mathematical Model Ship Power Propulsion for Service Speed Useful in the Preliminary Design." Management Systems in Production Engineering 25, no. 4 (December 1, 2017): 231–36. http://dx.doi.org/10.1515/mspe-2017-0032.

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AbstractDuring the design of the ship the most important decisions are made at the stage of preliminary design. One of the most important design parameters assumed by the shipowner is its service speed in real weather conditions occurring in the shipping line. For this speed, at the stage of preliminary design, when are known only to the basic geometric parameters of the ship should be determined motor power. In practice design, power propulsion is determined with a very approximate formulas but for the speed in calm water. Only after the project contract and the signing of the contract are carried out by means of resistance and self-propulsion of model test. The paper presents a mathematical model for determining the power propulsion for the assumed operating speed. This model is dependent only on the basic geometric parameters of the hull of the ship and the weather parameters occurring in liner shipping. Also shows the results of calculations according to this model, the power propulsion for one of vessels built.

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Cepowski, Tomasz. "An Estimation of the Final Price of Container Ships Based on Main Ship Parameters with the Use of ndCurveMaster Curve Fitting Software." New Trends in Production Engineering 1, no. 1 (October 1, 2018): 365–70. http://dx.doi.org/10.2478/ntpe-2018-0045.

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Abstract The paper presents regression formulas that allow us to estimate the final price of new container ships, based on TEU and deadweight capacity, service speed, length between perpendiculars and gross tonnage of container ships built from 2005 to 2015. The formulas were developed using the author’s own method based on curve fitting techniques and regression methods. The study shows that utilising the author’s method to predict the final price could offer greater accuracy solutions than any standard methods presented in literature. This method was implemented properly with ndCurveMaster curve fitting software which was developed by the author and was applied to develop regression equations presented in the article. The formulas presented in the article have practical application for estimation of container ship final price needed in transport studies or preliminary parametric container ship design. These equations refer to the most up to date vessels and offer the chance to advance ship design theory.

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Tomera, Mirosław. "Dynamic positioning system design for “blue lady”. simulation tests." Polish Maritime Research 19, Special (October 1, 2012): 57–65. http://dx.doi.org/10.2478/v10012-012-0024-4.

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ABSTRACT The dynamical positioning system is a complex control consisting of a number of components, including: filters, observers, controllers, and propeller allocation systems. The design and preliminary analysis of operational quality of system operation are usually done based on numerical simulations performed with the aid of the mathematical model of the ship. The article presents a concept of the dynamic positioning system applied to steering the training ship Blue Lady used for training captains in the ship handling research and training centre owned by the Foundation for Safety of Navigation and Environment Protection in Ilawa/Kamionka. The simulation tests performed in the numerical environment of Matlab/Simulink have proved the usability of the designed system for steering a ship at low speed.

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Şahin, Volkan, and Nurten Vardar. "Determination of Wastewater Behavior of Large Passenger Ships Based on Their Main Parameters in the Pre-Design Stage." Journal of Marine Science and Engineering 8, no. 8 (July 22, 2020): 546. http://dx.doi.org/10.3390/jmse8080546.

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Wastewater formed on ships is divided into blackwater and graywater. While blackwater refers to wastewater from toilets, graywater defines wastewater from sinks, laundry and restaurants. Even though some treatments are applied onboard before discharge, wastewater contains significant amounts of fecal bacteria, heavy metals, etc., in excess of water quality standards. Dilution is a secondary natural treatment in the ship-wake region, which occurs after wastewater discharging. According to the Environmental Protection Agency (EPA), the natural treatment process is quantified by dilution factor, which is strongly dependent on vessel width, draft, speed and wastewater discharge rate. In this study, an Artificial Neural Network (ANN) model linked with the main ship parameters was developed to estimate the dilution factors while the ship is in the preliminary design stage. Gross ton, deadweight ton, passenger number, freeboard, engine power, propeller number and block coefficient values of 1041 large cruise ships were used to estimate the likely dilution factors. The best ANN estimation model was determined by Root Mean Square Error (RMSE) and Mean Absolute Error (MAE) methods. A decision tree was created for the results and the most important parameters affecting the dilution factors were determined. The main ship dimensions are needed for the dilution factor formulation of EPA whereas in the model created in this study only the gross ton or engine power of the ship is sufficient to estimate the dilution. Moreover, this new model is also usable for the estimation of dilution factors even if the main dimensions of the ship are not known.

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Cepowski, Tomasz, and Paweł Chorab. "The Use of Artificial Neural Networks to Determine the Engine Power and Fuel Consumption of Modern Bulk Carriers, Tankers and Container Ships." Energies 14, no. 16 (August 7, 2021): 4827. http://dx.doi.org/10.3390/en14164827.

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The 2007–2008 financial crisis, together with rises in fuel prices and stringent pollution regulation, led to the need to update the methods concerning ship propulsion system design. In this article, a set of artificial neural networks was used to update the design equations to estimate the engine power and fuel consumption of modern tankers, bulk carriers, and container ships. Deadweight or TEU capacity and ship speed were used as the inputs for the ANNs. This study shows that even a linear ANN with two neurons in the input and output layers, with purelin activation functions, offers an accurate estimation of ship propulsion parameters. The proposed linear ANNs have simple mathematical structures and are straightforward to apply. The ANNs presented in the article were developed based on the data of the most recent ships built from 2015 to present, and could have a practical application at the preliminary design stage, in transportation or air pollution studies for modern commercial cargo ships. The presented equations mirror trends found in the literature and offer much greater accuracy for the features of new-built ships. The article shows how to estimate CO2 emissions for a bulk carrier, tanker, and container carrier utilizing the proposed ANNs.

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Martić, Ivana, Nastia Degiuli, Andrea Farkas, and Ivan Gospić. "Evaluation of the Effect of Container Ship Characteristics on Added Resistance in Waves." Journal of Marine Science and Engineering 8, no. 9 (September 9, 2020): 696. http://dx.doi.org/10.3390/jmse8090696.

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Added resistance in waves is one of the main causes of an increase in required power when a ship operates in actual service conditions. The assessment of added resistance in waves is important from both an economic and environmental point of view, owing to increasingly stringent rules set by the International Maritime Organization (IMO) with the aim to reduce CO2 emission by ships. For that reason, it is desirable to evaluate the added resistance in waves already in the preliminary ship design stage both in regular and irregular waves. Ships are traditionally designed and optimized with respect to calm water conditions. Within this research, the effect of prismatic coefficient, longitudinal position of the centre of buoyancy, trim, pitch radius of gyration, and ship speed on added resistance is investigated for the KCS (Kriso Container Ship) container ship in regular head waves and for different sea states. The calculations are performed using the 3D panel method based on Kelvin type Green function. The results for short waves are corrected to adequately take into account the diffraction component. The obtained results provide an insight into the effect of variation of ship characteristics on added resistance in waves.

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Park, Chang-Kyu. "A Study on the Web-based Distributed Design Application in the Preliminary Ship Design." Journal of information and communication convergence engineering 8, no. 5 (October 30, 2010): 473–78. http://dx.doi.org/10.6109/jicce.2010.8.5.473.

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Lee, Dongkon, and Soo-Young Kim. "Techno-Economic Optimization of an LNG Carrier with Multicriteria in the Preliminary Design Stage." Journal of Ship Production 12, no. 03 (August 1, 1996): 141–52. http://dx.doi.org/10.5957/jsp.1996.12.3.141.

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When economic optimization is considered in the preliminary design of a ship, required freight rate (RFR) is usually taken as the objective function because it is related to the building and the operating costs of a ship, reflecting the interest of both the shipyard and the shipowner. However, the choice of RFR as the objective function sometimes has an adverse effect on the designer. For example, to analyze the effect on the objective function of change of the building and operating costs, a sensitivity analysis is required for each item. That is, the relative importance of the two costs, when constructing a design model, is not obvious as they are combined together. In order to overcome the limitation of single objective optimization, a multicriteria optimization method has been used. To solve the multicriteria optimization problem with efficiency, a hybrid optimization solver is developed by coupling the genetic algorithm and the direct search method. Furthermore, to accelerate the searching speed of the solver in the design space, an Al (artificial intelligence) technique is applied to the hybrid optimization solver. It is applied to the optimum design of a liquified natural gas (LNG) carrier in the preliminary design stage. Through application to the ship design, the relative importance between the operating and building cost in the economic analysis of the ship design was manifested.

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Szelangiewicz, Tadeusz, and Katarzyna Żelazny. "Prediction Power Propulsion of the Ship at the Stage of Preliminary Design. Part I: Forecasting Method for Power Propulsion of Ship at the Stage of Preliminary Design." Management Systems in Production Engineering 25, no. 2 (June 1, 2017): 125–30. http://dx.doi.org/10.1515/mspe-2017-0019.

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Abstract During the design of the ship the most important decisions are made at the stage of preliminary design. One of the most important design parameters assumed by the shipowner is its service speed in real weather conditions occurring in the shipping line. For this speed, at the stage of preliminary design, when are known only to the basic geometric parameters of the ship and its motor power should be determined. In practice, design, power propulsion is determined with a very approximate formulas but for the speed in calm water. Only after the project contract and the signing of the contract are carried out by means of resistance and self-propulsion of model test. The article presents the concept of the method for determining the power propulsion for the assumed service speed, which depends only on the basic geometric parameters of the ship’s hull.

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Chaturvedi, Sudhir Kumar, Chan-Su Yang, Kazuo Ouchi, and Palanisamy Shanmugam. "Ship Recognition by Integration of SAR and AIS." Journal of Navigation 65, no. 2 (March 12, 2012): 323–37. http://dx.doi.org/10.1017/s0373463311000749.

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A novel design of an integrated system using Synthetic Aperture Radar (SAR) image and Automatic Identification System (AIS) data is proposed in this paper for the purpose of identifying ships at sea. TerraSAR-X® (SpotLight mode) images and AIS data collected over Incheon Port (Korea) and Tokyo Bay (Japan) were used on different dates. Four main steps for integration of SAR and AIS based ships can be identified, namely: ‘Time Matching’ to retrieve the respective Dead Reckoning (DR) position of the ships at SAR image acquisition times; ‘Position Matching’ based on a nearest neighbourhood re-sampling method with compensation of position shift; ‘Size Matching’ and ‘Speed Matching’. Under each of the matching criteria, the measurement error in each of the matching criteria was found to be less than 20% and the SAR extracted ship's hull boundaries were presented on a screen to display the system results. The results of this study will contribute to the design a Near-Real-Time (NRT) operational system for ship detection, identification, and classification by SARs in different data acquisition modes over various geographical locations at different acquisition times. This novel integrated system design will provide a most important preliminary step towards integration based on ships' hull monitoring in order to recognize ‘friend’ and ‘foe’ ship targets over a huge oceanic region and would be useful for coast guards as an early warning system.

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Cilia, Tancredi, Daniele Bertetta, Paola Gualeni, Giorgio Tani, and Michele Viviani. "Additive Manufacturing Application to a Ship Propeller Model for Experimental Activity in the Cavitation Tunnel." Journal of Ship Production and Design 35, no. 4 (November 1, 2019): 364–73. http://dx.doi.org/10.5957/jspd.11170055.

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Additive manufacturing (AM), or three dimensional printing, is a modern way to build objects with possibly a high degree of accuracy and favorable cost/benefit ratio. This approach is widely used by many manufacturing industries and a certain interest for this innovative production technology is also growing in the ship design and production field. To this regard, the experimental activity at the model scale is often necessary for the ship performance assessment in the design phase. In the article, preliminary results of a propeller model for the cavitation tunnel, built with additive technology, are presented, showing the strengths and weaknesses of the printed model. Moreover, as an introductive overview, different AM technologies are briefly described, with the aim to point out potential applicability to ships.

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Novak, Lino Josip, Darin Majnarić, Roko Dejhalla, and Albert Zamarin. "An Analysis of Basic Parameters of Ro-Pax Ships and Double-ended Ferries as Basis for New Hybrid Ferries Designs." Journal of Maritime & Transportation Science 3, no. 3 (June 2020): 33–48. http://dx.doi.org/10.18048/2020.00.02.

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The paper presents an analysis of the basic parameters of Ro-Pax ships and double-ended ferries. The study was carried out within the framework of the project METRO (Maritime Environment-friendly TRanspOrt systems), funded from 2014-2020 Interreg V-A Italy-Croatia CBC Programme. The aim of the project is an improvement of the environmental sustainability in the field of maritime transport, with particular emphasis on multimodality and “green” solutions for the coastal transport. The specific focus is on touristic connections in the North Adriatic area. One of the project goals is a development of short-medium range hybrid ships and of concern are Ro-Pax ships and double-ended ferries, which are the most common ship types for coastal shipping in the Adriatic area. Two extensive databases were created encompassing a large number of ferries that operate in Europe, by one for each ship type. The databases will serve as basis for the preliminary design of the new hybrid Ro-Pax ship and double-ended ferry.

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Nguyễn, Hoa Thị Ngọc, Ngoc Bich Vu, and Tat-Hien Le. "Nurbs modeling for design waterline based on the variation of sectional area curve." Science & Technology Development Journal - Engineering and Technology 3, SI2 (February 11, 2021): SI37—SI46. http://dx.doi.org/10.32508/stdjet.v3isi2.529.

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Hull form design from parent ships transforms the ship's parameters based on the variation of theoretical sectional area curve of the Lackenby method. The correction and modification of the theoretical sectional area curve is essentially the change of ship displacement, hull form coefficients, and the longitudinal center of buoyancy from the parent ships. In the preliminary design stage, the hull form design approach from parent ships minimizes the risks compared to the new design while still retaining hydrostatic and hydrodynamics' advantages. However, the Lackenby method of ship hull form variation uses a linear or quadratic function to shift the sectional area curves, regardless of the ship's hull form faring, especially the curvature's discontinuity the bow, stern, and midship. Therefore, the computer graphic algorithm based on the B-spline function is studied and applied; simultaneously, the mathematical model for the designed waterline is built in the form of a continuous curve instead of the B-spline segments. In this study, the mathematical model for the coastal container ship's design water line is constructed, ensuring continuity and fairing throughout the continuous B-spline curve. The geometry continuity evaluation results are expressed through the parameter curve's curvature and resistance component calculations' performance by computational analysis.

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Halebsky, Max. "System Safety Engineering as Applied to Ship Design." Marine Technology and SNAME News 26, no. 03 (July 1, 1989): 245–51. http://dx.doi.org/10.5957/mt1.1989.26.3.245.

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This paper describes the application of System Safety Engineering (SSE) during the design development phase of a ship program. The major objective is to incorporate safety into the initial ship design, including consideration of maintenance and operating safety. Accomplishment is by safety analyses which identify potential safety hazards and recommend specific actions to eliminate or minimize the hazards. The principal types of analyses performed are the preliminary hazard analysis, the subsystem hazard analysis, the system hazard analysis, the operating hazard analysis, and the fault tree analysis. Hazards are classified from Category I (catastrophic) to Category IV (negligible). Corrective action follows an order of precedence in which the preferred approach is to eliminate or control the hazard by means of the basic design, and the least desirable approach is to attempt to avoid the hazard by means of operating procedures

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Ljulj, Andrija, and Vedran Slapničar. "Seakeeping Performance of a New Coastal Patrol Ship for the Croatian Navy." Journal of Marine Science and Engineering 8, no. 7 (July 15, 2020): 518. http://dx.doi.org/10.3390/jmse8070518.

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This paper presents seakeeping test results for a coastal patrol ship (CPS) in the Croatian Navy (CN). The full-scale tests were conducted on a CPS prototype that was accepted by the CN. The seakeeping numerical prediction and model tests were done during preliminary project design. However, these results are not fully comparable with the prototype tests since the ship was lengthened in the last phases of the project. Key numerical calculations are presented. The CPS project aims to renew a part of the Croatian Coast Guard with five ships. After successful prototype acceptance trials, the Croatian Ministry of Defence (MoD) will continue building the first ship in the series in early 2020. Full-scale prototype seakeeping test results could be valuable in the design of similar CPS projects. The main aim of this paper is to publish parts of the sea trial results related to the seakeeping performance of the CPS. Coast guards around the world have numerous challenges related to peacetime tasks such as preventing human and drug trafficking, fighting terrorism, controlling immigration, and protecting the marine environmental. They must have reliable platforms with good seakeeping characteristics that are important for overall ship operations. The scientific purpose of this paper is to contribute to the design process of similar CPS projects in terms of the development of seakeeping requirements and their level of fulfillment on an actual ship.

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Miyamoto, Masafumi. "The Preliminary Design of a Ship Considering the Performance in Actual Seas." Journal of the Japan Society of Naval Architects and Ocean Engineers 7 (2008): 107–13. http://dx.doi.org/10.2534/jjasnaoe.7.107.

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MCKENNEY, TIMOTHY, EDWARD INGLES, and DAVID KOWALICK. "Preliminary Design of a Convertible Container Roll-On/Roll-Off (CCR) Ship." Naval Engineers Journal 104, no. 5 (September 1992): 43–51. http://dx.doi.org/10.1111/j.1559-3584.1992.tb01196.x.

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Liu, L., P. J. Tan, Y. Yuan, and P. Wrobel. "Preliminary assessment of the design requirement against blast load for ship superstructure." Ships and Offshore Structures 15, no. 5 (September 6, 2019): 550–73. http://dx.doi.org/10.1080/17445302.2019.1661628.

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Liang, Zheng Xuan, Lin Yan, and Ji Zhuo Shang. "Collaborative multidisciplinary decision making based on game theory in ship preliminary design." Journal of Marine Science and Technology 14, no. 3 (March 25, 2009): 334–44. http://dx.doi.org/10.1007/s00773-009-0048-3.

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Leal, Luis, Edison Flores, David Fuentes, and Bharat Verma. "Hydrodynamic study of the influence of bulbous bow design for an Offshore Patrol Vessel using Computational Fluid Dynamics." Ciencia y tecnología de buques 11, no. 22 (March 20, 2018): 29. http://dx.doi.org/10.25043/19098642.161.

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The resistance of a ship is of vital importance in giving greater viability to the development of a design project, since at lower ship resistance, the power demand to achieve a desired design speed will be lower which will reduce the amount of power to be installed in the ship resulting in lower fuel consumption. The use of computational fluid dynamics to analyze and optimize hull form and its appendages permits the hydrodynamic performance of the ship to be improved from the early design stages, allowing improvements to the hull shape and appendages. This paper shows a qualitative analysis which was performed to reduce the resistance of the OPVMKII (Second Generation Offshore Patrol Vessel) in its preliminary design stage by means of designing and integrating three types of bulbous bow with the ship´s hull and analyzing the resistance curves obtained using computational fluid dynamics.

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Journal articles on the topic 'Preliminary ship design'

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