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Sensitivity of extreme hydroelastic load effects to changes in ship hull stiffness and structural damping

机译:极端水弹性载荷效应对船体刚度和结构阻尼变化的敏感性

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摘要

A new hybrid method for the time-domain nonlinear simulation of the hydroelastic load effects and the peak over threshold (POT) method for the calculation of the short-term extreme responses are briefly described and applied to a flexible SL-7 class containership and a flexible liquefied natural gas (LNG) ship. Three stiffness levels, three stiffness distributions and three modal damping ratios are used to study the influence of the hull flexibility and structural damping on the short-term prediction of extreme vertical hydroelastic load effects. The results give justification for some simplified treatment of the first vertical flexible mode in early design stage when structural details are not available.
机译:简要描述了一种新的混合方法用于水弹性载荷效应的时域非线性模拟和用于短期极端响应计算的峰值阈值法(POT),并将其应用于柔性SL-7级集装箱船和一艘轻型集装箱船。柔性液化天然气(LNG)船。使用三个刚度水平,三个刚度分布和三个模态阻尼比来研究船体柔韧性和结构阻尼对极端垂直水弹性载荷效应的短期预测的影响。结果提供了在结构细节不可用时在设计初期对第一垂直柔性模式进行一些简化处理的理由。

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