Non-linear simulations of wave-induced motions of a floating body by means of the mixed Eulerian-Lagrangian method
Non-linear simulations of wave-induced motions of a floating body by means of the mixed Eulerian-Lagrangian method
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DOI：
10.1243/0954406001523821
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发表时间：
2000-06
期刊：
影响因子：
--
通讯作者：
M. Kashiwagi
中科院分区：
文献类型：
--
作者：
M. Kashiwagi
摘要提出了一种基于混合欧拉-拉格朗日（MEL）方法的二维浮体波浪诱导运动的非线性计算方法。注意力集中在与伯努利压力方程中的速度势的时间导数相关的水动力的有效计算上。与现有的方法不同，加速度场可以与速度场同时计算，这大大减少了计算时间。对壁面模型和喇叭形模型进行了计算，并将上波和下波位置的波浪以及物体运动（摇摆、垂荡和横摇）的数值结果与相应的实验进行了比较。总体一致性非常好，证实了本方法的有效性。本文还讨论了在张开模型中观察到的滚转参数振荡。
Abstract A non-linear calculation method based on the mixed Eulerian-Lagrangian (MEL) method is presented for wave-induced motions of a two-dimensional floating body. Attention is focused on an effective calculation of the hydrodynamic force associated with the temporal derivative of the velocity potential in the Bernoulli pressure equation. Unlike other existing methods, the acceleration field can be computed simultaneously with the velocity field, which contributes greatly to a reduction in the computation time. Computations are performed for a wall-sided model and a flared model, and numerical results of the waves at upwave and downwave positions and the body motions (sway, heave and roll) are compared with corresponding experiments. The overall agreement is very good, confirming the validity of the present method. The parametric oscillation in roll, observed for the flared model, is also discussed.