摘要
本文采用退化曲壳有限单元,推导了板壳结构非线性有限元分析的、修正的拉格朗日法(Updated Lagrauge简称U.L.法,下同),并编制了非线性有限元程序.利用本文理论方法既可分析板壳的太变形问题,同时也可考虑材料进入非线性后的太应变问题.通过对一些板壳屈曲问题的分析对比,证明了本文理论方法的正确性和有效性.
The Updated Lagrange (U. L. ) formulation for nonlinear finite element analysis of plates and shells is derived in this paper by adopting the degenerated curved shell element, and the computing program is worked out at the same time. In addition to the problem of plates and shells with large deformation, the problem with large strain can be solved by using the theory and method of this paper.The correctness and effectiveness of the theory and method are verified by analysing and comparing with some buckling problems of plates and shells.
出处
《土木工程学报》
EI
CSCD
北大核心
1997年第2期34-41,共8页
China Civil Engineering Journal
关键词
板壳结构
屈曲分析
后格朗日法
plate and shell, nonlinear buckling, Lagrange formulation.
