附连水质量的边界元法求解

研究了计算水下结构动态响应中附连水质量的边界元方法;根据数值积分和边界元法的原理,应用直线单元对结构边界进行离散,将原有表达形式中复杂的曲线积分转化成可直接计算的数值积分形式,从而解决了奇异积分的问题;得到了更适于直接计算的系数矩阵和向量的表达形式,使边界元法更方便地应用于计算无限流场中不规则截面物体的附连水质量.最后,给出了典型算例,并与经典计算结果比较,误差均在4%以内.

Boundary element method for solving added mass of structure

This paper dealt with an effective boundary element method,which was applied to analyzing the added mass of the underwater structure.The borderline of the structure was handled with linear element to develop the complex curvy integral in the former expression into a practical numerical form,on the basis of the boundary element method and numerical-value method.Morever,the problem of bizarre integral was solved and a more practical way was obtained for the matrix and vector,which made the boundary element me...