The conventional wave-body interaction analysis method, which uses the boundary element and Lagrangian time evolution methods (BEM-MEL), can cause numerical instability, and several solutions have been proposed. In this study, we propose a new method for removing mesh distortion using the mesh adjustment velocity and putting the nodes on the correct Neumann boundary surface using the clinging velocity. The stability of the proposed method and the convergence of present results to the experimental results were investigated. The simulation is well stabilized using the present method, allowing for a large time step in the initial value problem. Furthermore, the calculation results agree well with previous experimental and numerical results. The proposed method enables BEM-MEL to simulate violent phenomena efficiently and expands the scope of BEM-MEL application.

传统的波体相互作用分析方法，使用边界元和拉格朗日时间演化方法（BEM-MEL），会导致数值不稳定，已经提出了几种解决方案。在这项研究中，我们提出了一种使用网格调整速度消除网格失真并使用粘附速度将节点放置在正确的诺伊曼边界面上的新方法。研究了所提出方法的稳定性以及当前结果与实验结果的收敛性。使用本方法可以很好地稳定模拟，允许在初始值问题中使用较大的时间步长。此外，计算结果与先前的实验和数值结果非常吻合。