板壳结构屈曲分析的非线性有限元法  

Finite element analysis for nonlinear buckling of plates and shells

作　　者：杨娜[1] 沈世钊[1] 

机构地区：[1]哈尔滨工业大学土木工程学院

出　　处：《哈尔滨工业大学学报》2003年第3期338-341,共4页Journal of Harbin Institute of Technology

摘　　要：为进行板壳结构的屈曲分析 .采用三维退化曲壳元离散板壳结构 ,在TL列式下推导了考虑双重非线性的单元切线刚度矩阵 ,提出采用罚单元法处理结构加载边的位移约束条件 .应用所编制的程序 ,进行了平板、曲壳以及板式门架的双重非线性屈曲分析 .The plates and shells are discreted by degenerated shell element with nine nodes and the buckling properties are analyzed for element tangent stiffness matrix with considering the material nonlinearity and geometrical nonlinearity. A penalty element is adopted to consider the displacement restraint condition of loading boundary. Using the correlative program, the buckling analysis was made with plates, shells and portal frame made of plates. The comparison indicates that the present theory and the suggested method have great accuracy and reliability.

关 键 词：三维退化曲壳元 板壳结构 物理非线性 几何非线性 罚单元 屈曲分析 

分 类 号：TU391[建筑科学—结构工程]