摘要
在介绍几何非线性有限元法一般列式(T.L)的基础上,推导了三维空间梁单元的刚度矩阵,采用有限元非线性分析理论对MG(南汽)展示厅空间屋盖的整体稳定进行了全过程分析。文中分别讨论了该网壳在有无初始安装偏差影响状态下的稳定性态,采用了弧长法求解非线性方程,得到了该空间网壳结构整体稳定的全过程P-△曲线,为此类异型网壳的设计和分析提供了有价值的参考。
In this paper, the stiffness matrix of a three dimensional beam element was deduced on the base of introduced geometric nonlinear finite element in T. L Formulation. The geometrically nonlinear overall stability analysis with or without considering the effects of geometric imperfections of the latticed shell have been conducted by means of the nonlinear finite element method. And the dynamic characters have been studied. The arc-length method was utilized to solve the nonlinear equation systems, and the P - A curve of the spatial latticed shell structure was obtained. It is a valuable reference for the design and analysis of the similar special latticed shell.
出处
《结构工程师》
2008年第2期39-42,55,共5页
Structural Engineers
关键词
几何非线性分析
网壳结构
整体稳定性
特征值分析
geometric nonlinear analysis, latticed shell structure, overall stability, eigenvalue analysis
