中文摘要：

船舶与深海工程结构在恶劣海浪中会发生砰击和上浪等强非线性自由面流动问题，有必要开发适合模拟非线性自由面流动问题的数值方法。基于网格法在处理一些网格发生大变形或数值不连续问题时还存在困难，采用一种无网格方法——移动粒子半隐式法模拟了溃坝问题，比较了不同固体边界条件、时间步长、时间步进模式、迭代方法、核函数以及粒子初始间距对计算结果的影响，并将数值结果与实验结果进行了比较，两者吻合较好。

英文摘要：

For ships and deep water floating structures in heavy seas, strong nonlinear free surface flow problems will frequently occur, such as slamming and deck water loads. To predict the response of marine structures to such loads, it is necessary to develop a numerical method used for simulating nonlinear free surface flow. Since the mesh method has difficulty in dealing with either a heavily deformed mesh or a numerically noncontinuous problem, we adopted a meshless method, named moving particle semi-implicit （MPS） method to mimic the dam collapse. The effects of different solid wall boundary conditions, time steps, time stepping modes, iterative methods, kernel functions and initial particle spacing on numerical results were investigated in detail. Comparison between numerical simulation results and experimental ones were made, giving a reasonable agreement.