Assessment of Extreme Rolling of Ships in Random Seas
Assessment of Extreme Rolling of Ships in Random Seas
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随机海域船舶极端横摇评估
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
E. Kreuzer
中科院分区：
文献类型：
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作者：
L. Dostal;E. Kreuzer
我们分析的目的是改进船舶完整稳性准则。为此，我们开发的平均首次通过时间的临界横摇振幅的船舶行驶在长峰随机海浪与任意波相遇角的解析公式。从耦合垂荡-俯仰-横摇运动的模型出发，对横摇周期内横摇的快速振荡动力学进行平均，得到横摇能量漂移和扩散的方程。结果用于计算所需的平均首次通过时间。最后，我们将所提出的理论应用于一个样板船的设计。
The goal of our analysis is to improve intact stability criteria for ships. For this, we develop analytical formulas for mean first passage times of critical roll amplitudes of ships travelling in long crested random seas with an arbitrary wave encounter angle. Starting from a model for coupled heave-pitch-roll motion, we average the fast oscillatory dynamics of roll over the roll period, which yields equations for drift and diffusion of roll energy. The results are used to calculate the desired mean first passage times. Finally, we apply the proposed theory to a sample ship design.Copyright © 2014 by ASME