刚体撞水非线性响应的边界元分析

考虑了非线性性液面条件液面条件，采用边界元法，始终撞水物体和水看成一个耦合系统，并作为一个冲击／接触问题处理。在自由注面的处理上，采用逐步迭代方法，使其始终满足液面的非线性条件，最终使自由液面达到一满足非线性条件的稳定值。而在撞水力的求解上，亦采用与自由液面相关的逐步迭代逼近方法，求取其稳定值。文中最后给出了几种不同情况下二维圆柱刚体撞水的计算实例，结果有力表明记叙虎法的可靠性和有效性。

A BOUNDARY ELEMENT METH OD FOR NONLINEAR SLAMMING ANALYSIS

The nonlinear c ondition of water surface is consi dered, and by virtue of the boundary element method, th e slamming problem is treated as a n impact/contact model, where the impactor and water are regarded as a coupling system. The gradually i terative method is used to make th at water surface satisfies the nonlinear condition untill it achi ves a steady value. For solving of the slamming force, the gradual ly iterative approach connected wi th the free water surface is used to calculate the steady value. Two dimensional rigid cylinder slammi ng problems are analysed numerical ly. The results show the reliabi lity and effectiveness for solving the fluid structure impact problem s with serious nonlinearities.