加筋板壳结构初始后屈曲有限元分析

FINITE ELEMENT ANALYSIS OF INITIAL POSTBUCKLING OF STIFFENED PLATE AND SHELL STRUCTURES

本文将渐近屈曲理论应用于加筋板壳结构的总体初始后屈曲分析,在近似位能泛函中保留了更多的小项,并讨论了适当缩小大型结构计算区域的问题,给出了一个便于工程应用的小型有限元程序。

In this paper, the asymptotic postbuckling theory is used for total initial postbuckling analysis of stiffened plate and shell structures.In the approximate Potential energy functional the small termsa reret ained as much as possible.lt is generally helpful for the precision of asymptotic solution (harmless at least). In addition, the error due to appropriate reduction of the calculative area is discussed.A smallfi nite element program is given.The numerical results show that the method and progra mare simple and convenient, in analysis of postbuckling behavior for stiffened plate and shell structures.