Results 31 to 40 of about 824 (150)
Comparative analysis of seakeeping methods: numerical, software simulation and experimental study
Annals of "Dunărea de Jos" University of Galaţi: Fascicle XI Shipbuilding, 2023 The current study case presents a comprehensive comparison of seakeeping analysis methods, utilizing the seakeeping numerical analysis based on Lewis’s form description of a hull, Ansys Aqwa, and experimental data obtained from the towing tank of the ...
Dumitru Silviu Perijoc +1 more
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Mathematical Problems in Engineering, Volume 2022, Issue 1, 2022., 2022 The ongoing development of deep‐sea resources has contributed toward the widespread use of dynamic positioning (DP) systems that can operate in arbitrary sea areas without the limitation of operating water depth compared to mooring systems. The second‐order slowly varying forces can be compensated by DP feedback control.
Changde Liu +8 more
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IET Control Theory &Applications, Volume 15, Issue 16, Page 2067-2080, November 2021., 2021 Abstract In order to tackle the marine practical constraints, for example the actuator faults, the dead‐zone input, an improved composite adaptive neural control algorithm is proposed for dynamic positioning vehicles in presence of the unknown external disturbances. In the algorithm, the robust neural damping technique is employed to remodel the system
Guoqing Zhang +3 more
wiley +1 more source
Research on Ship Meteorological Route Based on A‐Star Algorithm
Mathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021 Ship meteorological navigation is based on hydrometeorological data of a certain time scale, considering the ship’s motion characteristics and its own characteristics. First, we provide the best route for the ship and then use real‐time local weather information to correct the route during the ship’s navigation.
Ge Chen, Tao Wu, Zheng Zhou, Xianyong Li
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Journal of Marine Science and Engineering, 2021 The present study aims to reduce the pitch motion of an assault amphibious vehicle system in seaways by waterjet impeller revolution rate control. A series of seakeeping tests were performed in a towing tank with a 1/4.5-scale model.
Daehan Lee +6 more
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Vertical Motion Optimization of Series 60 Hull Forms Using Response Surface Methods
Kapal, 2020 There are many aspects to analyze seakeeping performance, one of which is the ship's vertical motion. As well-known, vertical motion and its derivatives, vertical velocity and acceleration, will be related to other aspects of seakeeping performance, such
Budi Utomo, Muhammad Iqbal
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Seakeeping index as generalized indicator of ship seakeeping performance
Transactions of the Krylov State Research Centre, 2021 Object and purpose of research. This paper discusses the possibility of a ship design process that would consider seakeeping performance to the greatest extent possible. The purpose of this study was to work out a numerical indicator, an index, reflecting all the seakeeping properties relevant for suitability of given ship to its intended operational ...
openaire +1 more source
Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 Stability of a high‐speed craft is an essential matter, and porpoising is one of the most critical instabilities that could occur in some planing hulls due to inappropriate design. In this paper, the porpoising phenomenon and variation of step location yielding resistance reduction are studied through experimental and numerical methods.
Sayyed Mahdi Sajedi +2 more
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Hydrodynamic Analysis of Ship with Well Deck in the Linear Numerical Wave Tank
Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 In recent years, the development and construction of islands and reefs has been proposed by the government and commercial company. However, as a large cargo carrier cannot reach islands and reefs if the harbor is not available, such type of carrier which has well deck is designed to meet the requirements of delivering people and equipment.
Gang Xu +5 more
wiley +1 more source
Shock and Vibration, Volume 2020, Issue 1, 2020., 2020 Floating shock platform is generally used to test the antishock performance of large shipboard equipment. Shock acceleration signal will produce zero‐shift phenomenon in the test measurement process, which will affect the subsequent shock response spectrum analysis.
Xiongliang Yao +5 more
wiley +1 more source