用MPS方法数值分析孤立波与平板相互作用问题

Simulation of solitary wave interacting with flat plate by MPS method

表面孤立波与海洋结构物的相互作用常伴随有砰击、上浪等现象,是船舶与海洋工程领域需要研究的重要问题之一。该文采用基于无网格半隐式移动粒子MPS法开发的MLParticle-SJTU求解器,对孤立波与平板结构相互作用问题进行数值计算分析研究。模拟了二维孤立波对平板的冲击作用过程,得到的平板受力与实验结果吻合良好,验证了MLParticle-SJTU求解器在处理此类问题上的可行性。通过对孤立波与平板相互作用过程的三维模拟,观察到了有别于二维空间下的波浪在平板上表面演化过程,即呈现U型演化过程,说明对此类问题进行三维数值模拟的必要性。

The interaction between solitary wave and marine structure, with the phenomenon of slamming and green water, is one of the key issues in naval architecture and ocean engineering. In the paper, the in-house meshless particle solver MLParticle-SJTU based on Moving Particle Semi-Implicit（MPS） method is employed to numerically investigate the process of solitary wave acting onto flat plate in two-dimension firstly. Wave forces of the flat plate are in good agreement with experimental data in the literature, the solver shows good capacity in this problem. Furthermore, the three-dimensional simulation is carried out. Comparison against the two-dimensional result, U-type wetted surface of the plate is observed during the course of wave running up the plate. Hence, three- dimensional simulation is necessary for the issue of solitary wave interaction with flat plate.