圆柱形储液容器自振频率的计算

Nature Frequencies of Cylindrical Liquid Storage Containers

本文采用一种新的有限元法计算圆柱形储液容器的自振频率，该方法是将有限元法和边界积分方法结合起来，对壳体使用有限环单元离散，而对流体则作为一种理想的连续介质采用边界积分方法处理．这种方法的一个显著特点就是系统的自由度大大少于将液壳都化为有限元的方法．

In this paper, natural frequencies of cylindrical liguid storage containers are found through the useof a discretization scheme in which the elastic shell is modeled by finite elements of a ring shape andthe liquid is treated as a continuum by boundary solution techniques.In this approach,the number ofthe unknown is substantially less than those analyses where both tank wall and liquid are subdivided into finite elements.