Numerical simulation of wave-induced nonlinear motions of a two-dimensional floating body by the moving particle semi-implicit method
Numerical simulation of wave-induced nonlinear motions of a two-dimensional floating body by the moving particle semi-implicit method
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DOI：
10.1007/s00773-007-0260-y
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发表时间：
2008-05
影响因子：
2.6
通讯作者：
M. Sueyoshi;M. Kashiwagi;S. Naito
中科院分区：
文献类型：
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作者：
M. Sueyoshi;M. Kashiwagi;S. Naito
采用移动质点半隐式（MPS）法计算了浮体在甲板水作用下的非线性运动。为了计算刚体的运动，在物体表面上的每个粒子的位置处的流体压力被直接在空间中积分，并且平移和旋转运动的方程被在时间上积分，以确定在时域计算的每个时间步长处的刚体表面的正确位置。该方法的性能进行了验证，通过与测量结果的比较，在一个实验中，是新进行的使用一个小干舷的箱形浮体模型。虽然总体一致性良好，但在较短的波浪周期内观察到了一些差异，特别是对于摇摆中的漂移运动。数值分辨率对结果的影响通过改变粒子的数量来检查。随着粒子数量的增加，整体运动没有明显的改善，但局部自由表面轮廓的分辨率，包括甲板上的水，得到了改善。
The moving particle semi-implicit (MPS) method was applied to compute nonlinear motions of a floating body influenced by the water on deck. To compute the motions of a rigid body, the fluid pressure at the position of each particle on the body surface was directly integrated in space and the equations of translational and rotational motions were integrated in time to determine the correct position of the rigid-body surface at each time step of the time-domain calculation. The performance of this method was validated through a comparison with measured results in an experiment that was newly conducted using a model of a box-shaped floating body with a small freeboard. Although the overall agreement was good, some discrepancies were observed for a shorter wave period, especially for the drift motion in sway. The effect of numerical resolution on the results was checked by changing the number of particles. With a higher number of particles, no obvious improvement was seen in the global body motions, but the resolution of the local free-surface profile, including the water on deck, was improved.