建议一种用FEM-BEM耦合法求解动力问题的新格式

A New Technique of Solving Dynamic Problems by Coupling Finite Elements with Boundary Elements

本文采用Laplace变换方法,分别对动力问题的有限元方程和边界元方程进行Laplace变换,在变换域中进行耦合,该方法与直接在时间域中耦合法相比,奇异积分的阶次大大降低,可用求解静力问题的程序处理奇异积分,因而具有计算简单的优点.文章对耦合中的若干数值问题作了详细的介绍和讨论,并给出了全部计算公式.

In the paper, using Laplace transform, we respectively transform finite element equation and boundary element equation,and then couple them together. Compared with other methods which are coupled in time, domain, this method can greatly seduce the order of singular inteqrals, so it can be treated by e statics progiam. Therefore,the method has the advantage of computation simplicity. The paper also comprehencively introduces and discusses several numerical problems in the process of coupling, and present all computational formulas.