摘要
本文根据修正的总体Lagrange坐标描述法提出了空间桁架弹性大位移问题的增量有限元分析理论。本文导得的有限元增量刚度矩阵是对称的,精确的。算例表明:采用本文理论可以极为有效地分析各类空间桁架几何非线性问题。
Based on the updated total Lagrangian formulation an incremental finite element theory for elastic large deflection of space trusses is derived in this paper. The stiffness matrix obtained in this paper has a symmetric and concise form in which the large deftection effects on structures can be included accu rately. Numerical examples show that the incremental finite element method presented in this paper can analyse the geometrically nonlinear problems of space trusses satisfactorily and effectively.
出处
《工程力学》
EI
CSCD
1991年第3期45-54,共10页
Engineering Mechanics
基金
国家自然科学基金
关键词
空间桁架
大位移
有限元
弹性
Space trusses,Large dcflection,finite.element analysis.
