In this paper, global hydroelastic responses of two ultra large containerships in head and oblique waves are numerically predicted by means of a combined method which is mainly focused on the high-frequency vibrations under harsh sea conditions. The Damping Zone Method is used for the achievement of infinity radiation condition and the steady and unsteady flow are solved by Taylor Expansion Boundary Element Method (TEBEM). In the structure-property research portion, an improved beam structural model is applied for the analysis of vertical modal and coupled horizontal and torsional modal. In the hydrodynamic calculation phase, the nonlinearities of hydrostatic restoring forces and 1st order incident wave forces caused by the associated ship motions as well as the slamming loads in large amplitude regular oblique seas are taken into consideration. The simulating calculations of nonlinear hydroelastic responses of two containerships are carried out. Meanwhile, the forward speed effects are analyzed. An acceptable agreement is obtained between the numerical predictions and measured data in terms of motions and loads which validates the accuracy of the proposed method in this paper.

中文翻译：

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集装箱船在正波和斜波中的运动和耦合弯扭振动的数值预测


本文主要针对恶劣海况下的高频振动，采用组合方法对两艘超大型集装箱船在迎头波和斜波下的整体水弹性响应进行了数值预测。采用阻尼区法实现无限辐射条件，并通过泰勒展开边界元法（TEBEM）求解稳态和非稳态流动。在结构性能研究部分，采用改进的梁结构模型来分析竖向模态以及水平和扭转耦合模态。在水动力计算阶段，考虑了船舶运动引起的静水恢复力和一阶入射波力的非线性以及大振幅规则斜海中的砰击载荷。对两艘集装箱船进行了非线性水弹性响应的仿真计算。同时，分析了前进速度的影响。在运动和载荷方面，数值预测与测量数据之间获得了可接受的一致性，这验证了本文提出的方法的准确性。