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Journal articles on the topic 'Vibration measurement on board ship'

Author: Grafiati

Published: 11 March 2023

Last updated: 31 July 2025

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1

REGNIEZ, Margaux, Laetitia CELLI, and Julien POITTEVIN. "Measurement of sound perception to improve the performance of military ships." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 4 (2024): 6993–7000. http://dx.doi.org/10.3397/in_2024_3897.

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The performance of military ships relies on the performance of equipment and operators. Acoustic performance of military ships consists of: - the acoustic discretion of the vessel, allowing a strategical advantage in the event of a threat (more specifically: noise and vibrations management of ship sources); - the acoustic comfort of the operators in the ship, allowing better oral communication, better perception of safety alarms and a better focus. These effects can reduce time loss, and prevent operators from making errors. It is therefore important to manage the acoustic environment on board

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2

Shen, Chaoming, Jie Huang, Zexin Zhang, Jingya Xue, and Denghui Qian. "Sandwich Plate Structure Periodically Attached by S-Shaped Oscillators for Low Frequency Ship Vibration Isolation." Materials 16, no. 6 (2023): 2467. http://dx.doi.org/10.3390/ma16062467.

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Locally resonant phononic crystals are a kind of artificial periodic composite material/structure with an elastic wave band gap that show attractive application potential in low-frequency vibration control. For low-frequency vibration control problems of ship power systems, this paper proposes a phononic crystal board structure, and based on the Bloch theorem of periodic structure, it uses a finite element method to calculate the band structure and the displacement fields corresponding to the characteristic mode and vibration transmission curve of the corresponding finite periodic sandwich pla

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3

Coppotelli, Giuliano, Daniele Dessi, Riccardo Mariani, and Marcello Rimondi. "Output-Only Analysis for Modal Parameters Estimation of an Elastically Scaled Ship." Journal of Ship Research 52, no. 01 (2008): 45–56. http://dx.doi.org/10.5957/jsr.2008.52.1.45.

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The study of the ship structural response assumes an increasing importance as soon as the structures, characterized by much more lightness, are designed and built for faster vessels. This requisite implies a greater flexibility of the structures themselves, the elastic response of which has to be evaluated with accuracy in order to predict the dynamic behavior. In the present paper, a methodology for the identification of the modal parameters from the measurement of only the responses of a vibrating structure has been developed and applied to an elastically scaled model. This output-only techn

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Gorbachev, Maxim Michailovich, and Vladimir Viktorovich Kolyvanov. "Selecting methods of continuous monitoring of torsional vibrations in ship propulsion complexes." Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2023, no. 2 (2023): 54–65. http://dx.doi.org/10.24143/2073-1574-2023-2-54-65.

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The article considers the problem of the continuing emergency damages to the elements of ship engine-propulsion systems with fatigue failures of shaft pipelines. The classification societies require to analyze and measure the dangerous torsional vibrations in ship power plants. There is given an overview and comparison of methods of measuring torsional vibrations in order to determine the most promising ones for constant monitoring and diagnostics of the technical condition of the elements of marine propulsion systems. In the course of analysis of scientific and technical literature there have

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Mansi, Francesca, Enza Sabrina Silvana Cannone, Antonio Caputi, et al. "Occupational Exposure on Board Fishing Vessels: Risk Assessments of Biomechanical Overload, Noise and Vibrations among Worker on Fishing Vessels in Southern Italy." Environments 6, no. 12 (2019): 127. http://dx.doi.org/10.3390/environments6120127.

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Sea fishing is one of the sectors with the highest risk of illness and work-related accidents. The purpose of the study is to evaluate the exposure of fishing workers to three major risks: biomechanical overload, noise, and whole-body vibrations. We used common methods and measurement tools in the field: observational video analysis, questionnaires, and direct measurement. Noise and vibrations levels were measured aboard five boats belonging to the main fishing communities of Southern Italy. The random sample consisted of 310 workers, of whom 108 agreed to complete a questionnaire to collect d

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6

Matsumoto, Tomoya. "Differences in Noise Measurement Methods : Code on Noise Levels on Board Ships and Noise and Vibration Guidelines." Journal of The Japan Institute of Marine Engineering 51, no. 4 (2016): 477–78. http://dx.doi.org/10.5988/jime.51.477.

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L., PANA. "Measurement and analysis of vibrations of electric motors on board container ships." Scientific Bulletin of Naval Academy XXIV, no. 1 (2021): 145–56. http://dx.doi.org/10.21279/1454-864x-21-i1-018.

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The purpose of this paper is to measure and analysis the vibrations of electric motors on board container ships, in order to reduce the maintenance costs and implicitly in making the optimal decisions. In general, the faults that underlie electric motors are primarily due to mechanical and electrical efforts. Mechanical stresses occur as a result the overloads and rapid load variations. On the other hand, the overcurrents and overvoltages are usually in the close accordance with the power supplies. In this regard the mechanical faults cannot be analyzed by changing the parameters like voltage,

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Le-Dinh, Tuan, and Hai Tran. "Vibration analysis of shaft generator driven from main engine." Journal of Physics: Conference Series 2949, no. 1 (2025): 012055. https://doi.org/10.1088/1742-6596/2949/1/012055.

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Abstract In recent years, offshore service vessels have increasingly used hybrid propulsion systems with generators mounted coaxially with the main engine. These latest state-of-the-art shaft generators enable ship operators and builders to benefit from efficiency, performance, and reliability. By reducing a ship’s CO2 emissions, it also helps ships meet the International Maritime Organization’s (IMO) EEDI (Energy Efficiency Design Index) measure targeting new ship designs and construction to ensure energy-efficient standards and EEXI (Existing Ship Energy Efficiency Index) measure addressing

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9

Wen, Xiao Fei, Xing Di Wang, and Qiang Yuan. "A Study on Test Technology of Ship Shafting Torsional Vibration." Advanced Materials Research 199-200 (February 2011): 1423–28. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.1423.

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Ship shafting is a key component of ship power plant. Torsional vibration test for ship shafting is the essential step to ensure the safety of ship power systems. For the purpose of analyzing and comparing torsional vibration test methods, a study of the test methods, equipment and technology is carried out in this paper. Three different test methods are compared with each other by adopting two different test systems. The main propulsion and marine generator shafting torsional vibration characteristics are analyzed by using two different analysis methods respectively: the single order and reso

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Xue, Shufei, Shuochen Wu, Qing Tang, Shulin Liu, and Bai Liu. "Research on torsional vibration monitoring system of ship power shafting." IOP Conference Series: Materials Science and Engineering 1207, no. 1 (2021): 012007. http://dx.doi.org/10.1088/1757-899x/1207/1/012007.

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Abstract In this paper, the real-time monitoring technology of ship power system torsional vibration is studied. The photoelectric non-contact measurement method is used to measure the torsional vibration intensity of shafting, and the analysis service network management platform is established to realize the functions of real-time monitoring of shafting torsional vibration and upload and collect alarm data, through the front-end system, the torsional vibration strength and other parameters of the shafting are collected and transmitted to the background. The data of the background system is us

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Wu, Tong-Ming. "Engineering Analysis on Vibration Characteristics of Merchant Vessels with Theoretical and Onboard Test Approaches." Marine Technology and SNAME News 38, no. 04 (2001): 241–49. http://dx.doi.org/10.5957/mt1.2001.38.4.241.

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Recent development of ship design, such as flexible hull structures with somewhat light ship weight in terms of larger/longer/wider principal particulars and long-stroke diesel engine of high brake horsepower, has been demonstrated dramatically. Nevertheless, this kind of ship design concept harmfully degrades system stability of electronic instrumentation and operating performance of human beings in sea service. Therefore practical prediction on structural vibration behavior of designed vessels is of primary concern and has to be taken into account at the preliminary design stage. Two theoret

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12

Charchalis, Adam. "Measurement and Diagnostic System for Marine Engines." Journal of KONBiN 49, no. 3 (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 measuri

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13

Frank, DeBord, Hennessy William, and McDonald Joseph. "Measurement and Analysis of Shipboard Vibrations." Marine Technology and SNAME News 35, no. 01 (1998): 1–9. http://dx.doi.org/10.5957/mt1.1998.35.1.1.

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Excessive shipboard vibrations can cause structural and machinery failures, crew discomfort and fatigue, and increased maintenance requirements for shipboard systems. In many cases ship construction specifications require the shipyard to demonstrate "acceptable " levels of vibration using measurements completed during sea trials. This paper provides an overview of standards for these measurements and modern techniques used to collect and analyze the specified vibration data. A brief discussion of the types of vibrations found on ships and their causes is followed by a review of codes, guides a

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Pavan Kumar, GVV, V. V. S. Prasad, and B. H. Nagesh. "Measurement of small vessel machinery vibration induced acoustic signature levels." Journal of Naval Architecture and Marine Engineering 16, no. 2 (2019): 87–98. http://dx.doi.org/10.3329/jname.v16i2.42030.

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Ship vibrations, airborne and underwater noise levels have always been a challenging topic from a performance point of view in ship design, building and operation. The measurement shall help in monitoring the self-noise and the technical state of their machinery mechanism. The vibration levels on the main engine and auxiliary Genset foundation, airborne noise levels of the engine room and underwater self-noise levels of a small mechanized fishing trawler was measured at the jetty in idling condition. The vibration levels on the foundation measured the average value of 0.207 mm/s for the main e

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15

Liu, Hongmin, Xincheng Lin, Zhihao Gong, and Jieyuan Shi. "Combined Annoyance Assessment of Ship Structural Vibration and Ambient Noise." Buildings 13, no. 2 (2023): 363. http://dx.doi.org/10.3390/buildings13020363.

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Background: Noise and vibration are environmental pollutants that endanger people’s productivity and sleep quality in ships, but the coupled effect in ship cabins has not been studied. This study aimed to assess the coupled effect of noise and vibration in ship cabins and propose a comfortable range of noise and vibration. Methods: Three different accommodation cabins were chosen to measure noise and vibration levels and investigate their satisfaction. A revised model combining exponential membership functions was proposed to reveal the relationship between noise and vibration level and its re

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16

Zhou, Zhibo, Haicheng Liu, Pu Zhang, Songgui Chen, Hanbao Chen, and Yingtao Zhu. "Bollard Force Study Based on Vibration Frequency Method." Water 16, no. 12 (2024): 1686. http://dx.doi.org/10.3390/w16121686.

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Existing bollard force measurement methods have not yet been able to realise simple, accurate, and efficient measurements of the bollard force of a single ship’s cable. In this paper, an experimental study on the measurement of ship bollard force is carried out with reference to the calculation method of measuring the cable force of a diagonal cable. Based on the fundamental frequency method and the frequency difference method, a new comprehensive method is proposed to detect the fundamental frequency of cable vibration. A study on the identification of the cable condition based on the measure

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17

Li, Hui Feng, Wei Kang Zhu, Guo Hu Xue, Xian Chun Xu, and Li Ping Di. "Calibration Technology and Axial Error Correction Method." Advanced Materials Research 889-890 (February 2014): 653–57. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.653.

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To meet the demand of ship-board TT&C equipment measurement precision, its necessary to calibrate the equipment to define the error parameters. And the error parameters should be suitable for the revising model. Based on the research of instrumentation ships calibration technology and angle error revising theory of the ship-board TT$C equipment, this article found the error of the revising model of the ship-board TT&C equipment and bring forward the updated model how to revise the angle error by calibration for zero method, which solved the problem that azimuth error aperiodically aris

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18

Jiang, Guohe, Yuhao Yuan, Hao Guo, Gang Wu, and Zhenzhen Liu. "Vibration Characteristic Research of 100 m New Polar Exploration Cruise Based on Finite Element Modeling." Journal of Marine Science and Engineering 12, no. 5 (2024): 779. http://dx.doi.org/10.3390/jmse12050779.

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Luxury cruise ships are high-end passenger ships with facilities on board for the leisure and entertainment of passengers, so the comfort of luxury cruise ships is a matter of great concern. In this paper, a finite element model of a new polar exploration cruise ship is established, and the wet modes of the whole ship are calculated using the virtual mass method and compared with the principal frequencies of the excitation forces to initially verify the rationality of the design of the structural vibration characteristics of the whole ship. The admittance matrix of the vibration velocity to ex

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19

Herlambang, Sri Mulyanto, Agus Dwi santoso, Stefano Cirillo, and Bambang Bagus Harianto. "Electric Parameter Measurement on Main Generator Based on IoT for Safe Operational Feasibility." Technium: Romanian Journal of Applied Sciences and Technology 18 (November 10, 2023): 1–13. http://dx.doi.org/10.47577/technium.v18i.10149.

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The generator is the main source of electricity in the ship that will drive all activities on the ship. With the source of electricity supplied by the generator, human work will become lighter because it is helped by electrical energy. In order for the generator to work properly, it requires maintenance and must always be well controlled, so that the parameters generated by the generator must always be maintained by monitoring these parameters automatically using an ESP32 microcontroller. The parameters measured are current, voltage, power, frequency, work factor, KWh, RPM, temperature and vib

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20

Prastyo, Herru, Arief Budijanto, and Slamet Winardi. "Measurement Of Electrical Parameters On Iot-Based Main Generators For Safe Operational Feasibility." IJEEIT : International Journal of Electrical Engineering and Information Technology 7, no. 1 (2024): 41–45. http://dx.doi.org/10.29138/ijeeit.v7i1.2703.

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The generator is the main source of electricity on the ship which will power all activities on the ship. With an electricity source supplied by a generator, human work will become lighter because of the help of electrical energy. In order for the generator to work well, it requires maintenance and must always be well controlled, so that the parameters produced by the generator must always be maintained by monitoring these parameters automatically using the ESP32 microcontroller. The parameters measured are current, voltage, power, frequency, work factor, KWh, RPM, temperature and vibration. By

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21

Wang, Xue Ren, Xu Hong Miao, Chun Hui Yuan, De Jin Qian, and Di Jia. "Application of the Force Transferring Technique for Marine Machineries." Applied Mechanics and Materials 226-228 (November 2012): 26–29. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.26.

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It is necessary and valuable to build the transferring relationship between test bed datum and ship datum for satisfying the boundary requirements of exciting forces in ship’s vibration-acoustic analysis. Principle of the force transferring technique for machineries with multiple supporting points is introduced first, and then the measurement method for free velocities of machineries is given. A method for transferring test bed datum to ship datum of machinery force characteristics is discussed and applied to deal with a practical problem, in which the numerical simulation is used for predicti

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22

Jamal, A. Sulisetyono, and W. D. Aryawan. "Direct Measurement of Motion on Fast Ferries." IOP Conference Series: Earth and Environmental Science 1081, no. 1 (2022): 012036. http://dx.doi.org/10.1088/1755-1315/1081/1/012036.

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Abstract This paper describes a new identification method for the fast ferry motions by using the direct measurements on the ship’s board. The inertial sensor type of the Analog Devices (ADIS) 16364 is selected as a as suitable instrument to measure accelerations and velocity of the ship motions namely heave, pitch, and roll in time domain. Furthermore, the ship motion responses are transferred as the energy spectral density in frequency domain which are identified using the Fast Fourier Transform (FFT) method. For the case study, the measurement equipment was placed on the navigation room of

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Ungnad, Steffen, Delf Sachau, Carsten Zerbs, Andreas Müller, and Anton Homm. "Experimental Investigation into the Active Narrowband Reshaping of a Ship Model’s Acoustic Signature." Acoustics 7, no. 2 (2025): 34. https://doi.org/10.3390/acoustics7020034.

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The use of inertial actuators to control the radiated sound pressure of a steel ship model at a lake measurement facility is examined. Therefore, methods of active vibration control as well as active control of target sound fields are applied using a fixed configuration of twelve accelerometers, eight control actuators, and five hydrophones. A narrowband feedforward active control system is used to manipulate the sound pressure at hydrophone positions, focusing not only on reducing but also on adding spectral lines in the radiated signature. The performance is assessed using measured data by a

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Gerasidi, V. V., and A. V. Lisachenko. "Analyzing vibration parameters of a modern high-speed engine during operation." Journal of Physics: Conference Series 2061, no. 1 (2021): 012056. http://dx.doi.org/10.1088/1742-6596/2061/1/012056.

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Abstract The paper presents results of experimental research into vibration parameters of a modern electronic control-enabled main high-speed engine, Caterpillar CAT 3516B as obtained during a running trial of a sea tug. CAT 3500 series Caterpillar high-speed engines are extensively used in sea tugs; there are about 40 units installed in vessels operating in the Azov and Black Sea region. The research technique involved measurement of vibration displacement, vibration velocity, vibration acceleration at an engine and its turbocharger components. The conducted experimental research has shown th

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Jung, Byung Chang, Young-Cheol Huh, Tae-Young Chung, Jung-Hoon Chung, and Eung-Sik Jeon. "Development of a wireless measurement system for ship vibration in a sea trial." Noise Control Engineering Journal 66, no. 3 (2018): 287–99. http://dx.doi.org/10.3397/1/376624.

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Bregant, Luigi, Flavia D'Agostin, and Martina Lorenzino. "Are on board comfort classes noise and vibration levels really suitable?" INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 5 (2021): 1206–14. http://dx.doi.org/10.3397/in-2021-1777.

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In shipbuilding industry, comfort is a relevant issue both for crew members and passengers. A comfortable environment enables crew members to perform accurately their tasks and it is an effective factor contributing to the satisfaction of passengers. Noise and vibration, as environmental parameters, play an important role in subjects' comfort. Naval Classification Societies established series of noise/vibration comfort level criteria, which, however, did not take into account some aspects: 1) noise/vibration recordings are carried out during time periods shorter than the exposure time of passe

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Jiao, Jialong, Huilong Ren, Shuzheng Sun, and Christiaan Adika Adenya. "Experimental Investigation of Wave-Induced Ship Hydroelastic Vibrations by Large-Scale Model Measurement in Coastal Waves." Shock and Vibration 2016 (2016): 1–14. http://dx.doi.org/10.1155/2016/9296783.

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Ship hydroelastic vibration is an issue involving mutual interactions among inertial, hydrodynamic, and elastic forces. The conventional laboratory tests for wave-induced hydroelastic vibrations of ships are performed in tank conditions. An alternative approach to the conventional laboratory basin measurement, proposed in this paper, is to perform tests by large-scale model measurement in real sea waves. In order to perform this kind of novel experimental measurement, a large-scale free running model and the experiment scheme are proposed and introduced. The proposed testing methodology is qui

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Hou, Lanlan, and Shuqian Cao. "Evaluation Method for Vibration Measurement on Casing in Aeroengine: Theoretical Analysis and Experimental Study." Shock and Vibration 2019 (March 14, 2019): 1–15. http://dx.doi.org/10.1155/2019/1648709.

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The vibration measurement location is the basis for effective monitoring of aeroengine vibration conditions. Measurement locations need to reflect the vibration of the rotor sufficiently, while complex structures of the aeroengine bring many excitation sources. This paper presents an evaluation methodology for vibration measurement on casing in the aeroengine. A number of indexes are defined to quantify and characterize the vibration measurement ability of main measurement locations on casing for rotor vibration. A dynamic model of a dual-rotor-casing system is established according to the sup

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Guo, Jun, Mei-ting Wang, You-wei Kang, Yin Zhang, and Chen-xu Gu. "Prediction of Ship Cabin Noise Based on RBF Neural Network." Mathematical Problems in Engineering 2019 (April 14, 2019): 1–21. http://dx.doi.org/10.1155/2019/2781437.

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Prediction of cabin noise for new types of ships and offshore platforms, based on measurement or simulation databases, is a common problem that needs a solution at the beginning of the design process. In this paper, we explore the use of a radial basis function (RBF) neural network to study this problem. Within the framework of the RBF network, we implement and compare several algorithms to devise a fast and precise cabin noise prediction model. We select a combination of algorithms after training the RBF with noise measurement samples. The results show that the RBF neural network trained usin

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Zhu, Chenyang, Tomaso Gaggero, Nicholas C. Makris, and Purnima Ratilal. "Underwater Sound Characteristics of a Ship with Controllable Pitch Propeller." Journal of Marine Science and Engineering 10, no. 3 (2022): 328. http://dx.doi.org/10.3390/jmse10030328.

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The time-dependent spectral characteristics of underwater sound radiated by an ocean vessel has complex dependencies on ship machinery, propeller dynamics, hydrodynamics of ship exhaust and motion, as well as ship board activities. Here the underwater sound radiated by a ship equipped with a controllable pitch propeller (CPP) is analyzed and quantified via its (i) power spectral density for signal energetics, (ii) temporal coherence for machinery tonal sound, and (iii) spectral coherence for propeller amplitude-modulated cavitation noise. Frequency-modulated (FM) tonal signals are also charact

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Abdullah, Mudafer Kareem, and Ahmed Abd Ali Hamid AL-Mafraji. "MEASUREMENT OF TRANSMITED VIBRATION TO TRACTOR SEAT." Journal of Engineering 17, no. 05 (2011): 1260–68. http://dx.doi.org/10.31026/j.eng.2011.05.17.

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A field experiment was conducted at experimental field of Mechanization Agriculture , theCollege of Agriculture , Abu – Ghraib , University of Baghdad .To measure transmitted vibration toseat tractor during operation tillage , mold board plow with New Holland 66-S- 80 tractor as onemachinery unit , Soil was treated at soil constant moisture ( 18 – 20 % ) with two depths of plowing(15 and 20 cm ) and three speed of tractor 2.0 , 3.5, 6.8 km / h . Three main dimensions in seattractor measurement vertical, longitudinal and lateral acceleration. Split plot design undercompletes block design with t

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Yao, Hai, Guanyong Hu, and Xiaofei Wang. "Design of Amplifier Circuit of Optical Fiber Sensor and Its Application in Cloud Computing of Mechanical Vibration Fault." Journal of Nanoelectronics and Optoelectronics 18, no. 2 (2023): 202–9. http://dx.doi.org/10.1166/jno.2023.3378.

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Photoelectric detection technology has been widely used in industry, agriculture, medicine, and other fields. The signal collected by photoelectric signal detection equipment is weak and vulnerable to noise interference. Therefore, a preamplifier circuit with good performance is needed to amplify the original signal effectively. Firstly, considering that a single-mode fiber coupler is more sensitive to the length of the coupling region, a coupled optical fiber vibration sensor is designed. Secondly, the appropriate operational amplifier (Op-amp) is chosen based on the photodetector. By listing

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Masnicki, Romuald, Janusz Mindykowski, and Przemyslaw Grala. "Towards Safety Improvement of Measurement and Control Signals Transmission in Marine Environment." Sensors 20, no. 6 (2020): 1668. http://dx.doi.org/10.3390/s20061668.

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This paper is dedicated to some aspects of maritime on-board safety improvement. The contribution of this article is a proposal to extend wireless communication on the ship, supported by examples of solutions that have not previously been used on board. Analyzed aspects concern the measurement and control signal transmission in hostile marine environment. A problem to solve is formulated, how to reduce a negative impact of this environment on effectiveness and reliability of maritime on board communication. The proposed ways for solving a problem under consideration cover recommendations conce

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Guo, Yukuo, Ruiping Zhou, Zhaozhao Ma, Jianzheng Wang, and Longqi Ding. "Research on the Dynamic Response Characteristics of the Propulsion Shaft System with an On-Shaft Generator in Ships." Applied Sciences 14, no. 15 (2024): 6769. http://dx.doi.org/10.3390/app14156769.

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The propulsion shaft system, as the core of the ship’s power system, has attracted widespread attention in terms of vibration. This paper is dedicated to the study of the dynamic response characteristics of the ship propulsion shafting system, with a particular focus on the impact of the shaft-driven generator supported by bearings on the dynamic torque of the shafting system. A classic lumped-parameter equivalent system model is adopted, and the time domain transient response simulation calculation is conducted based on the Newmark-β method. A comprehensive analysis is made of the vibration t

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Murawski, Lech. "Influence of the Numerical Modelling Methods on Dispersions and Errors of Analysis Results of Ship Hull and Deckhouse Vibrations." Journal of KONBiN 52, no. 4 (2022): 207–22. http://dx.doi.org/10.2478/jok-2022-0051.

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Abstract Ships’ (especially containers) vibrations significantly impact navigation safety. The presented analyses aims to identify the main forces exciting the ship’s superstructure and hull vibrations, test their influence on vibration levels, and verify the assumptions of the computational methodology. Two container ships were analysed. The influence of different modeling methods on the obtained calculation results was investigated. The impact of various operating parameters on the vibration level was also analysed. The numerical analyses results are compared with some empirical formulas. As

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Arevalo Gomez, Roger. "Measurement and analysis of vibrations - evaluation of the criteria of acceptance ISO Standard 10816-6." Ciencia y tecnología de buques 13, no. 26 (2020): 39–44. http://dx.doi.org/10.25043/19098642.196.

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During the reception and / or delivery tests of a ship, vibration measurement and analysis is made to the propulsion line in order to evaluate and predict the condition of the machinery. The values taken during the measurement of the vibrations are evaluated with the acceptance criteria provided by the standards. International Standard ISO 10816-6 (1995) focuses on reciprocating machinery with power of greater than 100kW, is used by both analysts and manufacturers of propulsion machinery for ships. Through this work, we intend to evaluate the acceptance criteria of this norm in boats smaller t

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Wojciechowski, K., H. Graczyk, M. Piwowarczyk, R. Truszkowski, and P. Rękawek. "Data acquisition unit for suborbital rocket vibration measurement." Journal of Physics: Conference Series 2526, no. 1 (2023): 012064. http://dx.doi.org/10.1088/1742-6596/2526/1/012064.

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Abstract Suborbital rockets and space launch vehicles experience high levels of vibration. They are caused by various factors, such as aerodynamic effects on the external surfaces and engine combustion instability. The second factor is especially pronounced in hybrid rocket engines, such as the main engine of the ILR-33 AMBER 2K rocket. In order to ensure the correct operation of all the equipment and payload on board, vibration testing of the devices is necessary as part of pre-flight qualification. For such tests to be truly indicative of in-flight performance, the vibration environment of t

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Zhi-Fei Guo, Zhi-Fei Guo, and Feng Yang Zhi-Fei Guo. "Research on the Design and Application of a Rapid Inspection System and Method for Ship Curved Plate Forming Based on Binocular Vision." 電腦學刊 35, no. 5 (2024): 221–36. http://dx.doi.org/10.53106/199115992024103505015.

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<p>Based on the analysis of the actual processing environment, this paper first builds a fast detection system based on binocular vision for the detection of the machining accuracy of ship curved plates. The visual sensors and lenses in the system are analyzed and selected. After selection, the binocular vision is calibrated using Zhengyou Zhang&rsquo;s calibration method, and visual distortion is corrected through matrix transformation. Then, in order to complete the calculation of the curvature of the ship&rsquo;s curved board, a curvature calculation model for the ship&rsq

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Miao, Hui, Guang Lei Song, and Qiang Liu. "Micro-Vibration Analysis and Measurement on High Resolution Remote Sensing Satellites." Applied Mechanics and Materials 232 (November 2012): 432–36. http://dx.doi.org/10.4028/www.scientific.net/amm.232.432.

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Because micro-vibration environment of the high resolution remote sensing satellite makes great influence on image quality, it is necessary to design micro-vibration measurement equipment to accurately measure the micro-vibration parameters which impact the CCD imaging quality. The paper proposes a set of template to design the parameters of the micro-vibration on board. Starting from the change of CCD modulation transfer function (MTF) due to the micro-vibration, we can build the model, analyze the relationship of the CCD MTF and the frequency and the amplitude, and then we can determine the

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KAWAMURA, Yoshiaki, Kuniaki SHOJI, Kiyokazu MINAMI, and Junzoh SETO. "A Study on the Working Environment on Board Ship by Finger Pulse Measurement." Journal of Japan Institute of Navigation 104 (2001): 243–49. http://dx.doi.org/10.9749/jin.104.243.

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Liang, Bing Nan, Hong Liang Yu, and Yu Chao Song. "Analysis of Damping Performance for Cabin Deck Covered with Floating Floor Coverings." Advanced Materials Research 610-613 (December 2012): 2566–70. http://dx.doi.org/10.4028/www.scientific.net/amr.610-613.2566.

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Floating floor coverings are widely applied in ship structures. With regard to the laminated composite shells made up of floating floor coverings and cabin deck and based on ANSYS system, a dynamics analysis on structures of three different kinds of floating floors is performed using FEM built upon laminated shell elements. The influence of rockwool board in terms of thickness, density and elastic modulus on structure dynamic characteristics is discussed. The performances of vibration control of three different floating floor structures are compared. The FEM performs well in analyzing and calc

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Chandra Ariesta, Rizky, Achmad Zubaydi, Abdi Ismail, and Tuswan Tuswan. "Identification of Damage Size Effect of Natural Frequency on Sandwich Material using Free Vibration Analysis." Naše more 69, no. 1 (2022): 1–8. http://dx.doi.org/10.17818/nm/2022/1.1.

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One of the most innovative developments in the field of advanced materials is sandwich materials. Sandwich material applications need standard requirements to be applied to marine structures, especially on ship construction. Sandwich material research is conducted on a laboratory scale to obtain the appropriate material composition in its development. In the process of developing this material, the material can be damaged. Most damage occurs in the core material, which results in difficulties in the identification process. This study compares damage identification methods based on free vibrati

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Yunsheng, AN, Chaoming Huang, Zhanhua Wu, et al. "A relative torsional vibration monitoring method for intelligent ships and associated error analysis." Insight - Non-Destructive Testing and Condition Monitoring 64, no. 5 (2022): 285–94. http://dx.doi.org/10.1784/insi.2022.64.5.285.

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In this era of rapidly developing transport technology, shipping accounts for two thirds of the total international trade and transport industry. Nowadays, 'ship intelligence' is an important avenue to pursue in the development of the shipping industry and it requires ships and their working machinery to undergo real-time and high-precision inspection and diagnoses of their operational state. This paper develops a simple method for monitoring relative torsional vibration using multiple measuring points, which is suitable for the monitoring of intelligent ship rotating machinery. A proof-ofprin

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Núñez, José, Pedro Orgeira-Crespo, Carlos Ulloa, and Inés García-Tuñón. "Analysis of the operating conditions for UAV-based on-board antenna radiation pattern measurement systems." PLOS ONE 16, no. 2 (2021): e0245004. http://dx.doi.org/10.1371/journal.pone.0245004.

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Communications, navigation, and other related systems need to have a well-defined antenna radiation pattern. In onboard vessel systems, the radiation pattern can be much different than the one obtained for an isolated antenna (because of the vessel’s structure and other nearby radiating systems interference). Finding out the onboard antenna’s radiation pattern is a well-known problem for any shipbuilder/owner. The conventional method consists of measuring radiation patterns from a fixed antenna on the coast while the ship is navigating in circles. Recent electronic systems in the market now al

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El-Safoury, Mahmoud, Miguel Dufner, Christian Weber, et al. "On-Board Monitoring of SO2 Ship Emissions Using Resonant Photoacoustic Gas Detection in the UV Range." Sensors 21, no. 13 (2021): 4468. http://dx.doi.org/10.3390/s21134468.

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A photoacoustic gas detector for SO2 was developed for ship exhaust gas emission monitoring. The basic measurement setup is based on the absorption of electromagnetic radiation of SO2 at 285 nm wavelength. A commercially available ultraviolet (UV) light-emitting diode (LED) is used as the light source and a micro-electro-mechanical system (MEMS) microphone as the detector. In order to achieve the required detection limits in marine applications, a measuring cell which allows an acoustically resonant amplification of the photoacoustic signal was developed and characterized. A limit of detection

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Murai, Koji, Shin‐Ichi Wakida, Keiichi Fukushi, Yuji Hayashi, and Laurie C. Stone. "Enhancing maritime education and training." Interactive Technology and Smart Education 6, no. 4 (2009): 293–302. http://dx.doi.org/10.1108/17415650911009272.

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PurposeThe purpose of this paper is to propose that the measurement of salivary amylase activity is an effective index to evaluate the stress of a ship navigator for safe navigation training and education.Design/methodology/approachEvaluation comes from the simulator and actual on‐board experiments. The subjects are real captains who have unlimited licenses and cadets who are senior students at Kobe University, navigation course. Stress is evaluated for several situations where a ship navigator makes a lot of decisions, in this case in a narrow passage, entering a port and leaving a port.Findi

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Villarroel, Adrian, Grover Zurita, and Romeo Velarde. "Development of a Low-Cost Vibration Measurement System for Industrial Applications." Machines 7, no. 1 (2019): 12. http://dx.doi.org/10.3390/machines7010012.

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Vibration-Based Condition Monitoring (VBCM) provides essential data to perform Condition-Based Maintenance for efficient, optimal, reliable, and safe industrial machinery operation. However, equipment required to perform VBCM is often relatively expensive. In this paper, a low-cost vibration measurement system based on a microcontroller platform is presented. The FRDM K64F development board was selected as the most suitable for fulfilling the system requirements. The industrial environment is highly contaminated by noise (electromagnetic, combustion, airborne, sound borne, and mechanical noise

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Jeong, Hongseok, Jeung-Hoon Lee, Yong-Hyun Kim, and Hanshin Seol. "Estimation of the Noise Source Level of a Commercial Ship Using On-Board Pressure Sensors." Applied Sciences 11, no. 3 (2021): 1243. http://dx.doi.org/10.3390/app11031243.

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The dominant underwater noise source of a ship is known to be propeller cavitation. Recently, attempts have been made to quantify the source strength using on-board pressure sensors near the propeller, as this has advantages over conventional noise measurement. In this study, a beamforming method was used to estimate the source strength of a cavitating propeller. The method was validated against a model-scale measurement in a cavitation tunnel, which showed good agreement between the measured and estimated source levels. The method was also applied to a full-scale measurement, in which the sou

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Goncharuk, Daniil, Aleksandr Degtyarev, and Ilya Bus'ko. "Identification of Damaged Ship State During Compartments Flooding." Computer tools in education, no. 4 (December 29, 2023): 41–49. http://dx.doi.org/10.32603/2071-2340-2023-4-41-49.

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The article is focused on method of ship rolling processing during flooding of compartments. The main goal of such processing is in determination of the time moment, when the type of static stability diagram changes. The ship state corresponding to each of these types requires completely different methods of damage control, which is reflected in the knowledge base of the onboard intelligent system. In navigation conditions, and even more so in extreme situations, direct measurement of the stability characteristics of a marine object is impossible, so their indirect determination is required. T

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Chang, Hai Juan, Jian Jun Zhang, and Shu Zhu. "Application of Clustering Analysis Algorithm in Sorting Stochastic Vibration Environment Measured Data." Applied Mechanics and Materials 52-54 (March 2011): 1433–37. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.1433.

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Environment measurement technology of aircraft platform is the foundation of environment prediction, while inductive technology of environment measurement data is the support of environment prediction. To analysis how the vibration of different channel and in different position affect the equipment on board, it’s awfully needed to classify the vibration data of aircraft platform according to how was the aircraft flying and where was the sensor placed. However, the traditional method for categorizing gives the sort first, and then make certain if one sample belongs to this category, which is ea

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