基于解析解和边界元解的圆柱壳声辐射对比研究

摘要

The influence of two loading forms of boundary element method ( BEM) software Sysnoise including element-based and node-based on sound radiation, and the convergence of two loading forms when refining the mesh were at first time investigated with analytical solution for a cylindrical shell. And it was obtained that the result based on loading form of element is better than that based on loading form of node; the result based on loading form of element when refining the mesh is convergent while that based on loading form of node when refining the mesh is uncertain.%针对工程广泛应用的圆柱壳结构,首次运用解析法探讨了边界元软件Sysnoise两种加载方式-基于单元(Element)加载和基于节点(N.de)加载-对声辐射影响,以及两种加载方式在网格加密情况下的收敛性问题.得到一些对工程计算的有益结论:①基于单元(Element)加载方式得到的结果要好于基于节点(Node)加载方式；②基于单元(Element)加载方式网格加密时收敛到解析解,而基于节点(Node)加载方式网格加密后,不一定得到收敛结果.