船体水动力网格动态划分技术及应用

Ship Hull Dynamic Remeshing Technique and Its Application

考虑到船舶与波浪耦合作用下,船体湿表面时刻变化,引起非线性动力效应,根据网格单元与波浪的不同接触类型,分别采用拆分、合并和局部调整得到新的船体湿表面网格,选取波浪环境中线性规则波2种情况,对简体船舶模型在波浪环境下横摇和纵摇进行算法验证,并对线性波中集装箱船湿表面网格动态划分过程进行数值模拟,验证算法的正确性与实用性,为波浪中船体非线性动力特性的时域计算提供技术支持。

When a ship motions in waves, the wet surface is changing continually, causing the nonlinear dynamic effect,. According to the different contact types of grid cell and the waves, respectively adopt split, merge and partial adjustment to get the new mesh of the wet surface. Two kinds of linear regular wave are selected for the wave environment, the dynamic remeshing algorithm is tested and verified by a simplified ship model with motions of rolling and pitching. And the dynamic meshing process for the wet surface of a container ship in the linear wave is simulated to verify the practicability of the algorithm. It can provide the technical, support for the time domain calculation of the nonlinear dynamic characteristics of the ship hull.