基于NURBS的船体与桥墩间水动干扰力及力矩的非定常计算

摘要

本文在一些假设下完成了船体与桥墩之间水动干扰力及力矩的数值计算工作,所采用的方法是基于非均匀有理B样条(NURBS)的三维Rankine源边界元法,即将船体、桥墩的几何形状以及流场中待求的物理量分布完全表达成NURBS的形式.给出了船体通过圆柱形桥墩时的水动干扰力及力矩的数值计算结果,并进行了一些分析.%The hydrodynamic interaction forces and moments between the ship and the pier are numerically computed under some assumptions. The method taken in this paper is a three-dimensional Rankine source boundary element method fully based on non-uniform rational B-spline (NURBS).The geometry of ship hull and pier and unknowns to be solved in the fluid domain are expressed as the format of NURBS.The numerical results and analysis are given for the hydrodynamic interaction forces and moments when a ship is passing a circular pier.