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中文摘要：
在特定的周期条件下,波浪与深海多柱平台的相互作用会引起柱群附近波面显著抬升且波面近似驻波分布的准陷波现象,该现象的发生将增大平台破坏的风险,对此时的结构内力开展计算研究进而考察各部位构件受力以及评估整体强度是十分必要的。该文在势流理论框架下应用边界元方法,建立了计算结构内力的数值模型,应用目前的模型对特征内力随入射波浪频率的变化规律以及准陷波现象对特征内力的影响开展数值研究。结果表明,准陷波现象对浮筒间纵向剪力的影响十分显著,而较大的剪力会影响结构的整体强度甚至引起构件破坏。
英文摘要：
Deep-sea multi-cylinder platform interacting with waves in specific frequency causes near-trapping which has large amplifications of surface oscillations and approximate standing wave patterns.This phenomenon will increase the risk of the platform damage so that it is essential to calculate characteristic hydrodynamic responses for evaluating member stress and overall strength situation.This article applies boundary element method under potential flow theory to research the variation of characteristic hydrodynamic responses with incident wave frequency and the effect of near-trapping on characteristic internal forces.Neartrapping will lead longitudinal shear force between the pontoons to achieve a dangerous value,and this larger shear may result in structural damage.
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