空间网格结构几何非线性有限元分析方法的研究

Research on geometrical nonlinar finite element method of spatial reticulated structures

在对 T.L/ U.L.法和 C.Oran梁柱单元有限元法进行系统研究比较的基础上 ,推导了结合以上两种理论的几何非线性有限元列式。C.Oran梁柱单元在分析轴力为主的结构时具有非常高的效率 ,但在分析纯弯曲问题时却存在很大困难。本文采用 VC+ + 6 .0编制了面向对象的非线性有限元程序 ,对其进行了考题验算分析 ,得出了有用的结论。

Based on systemic study on the geometrical nonlinear finite element theory (C.Oran beam-column theory and T.L. method/U.L. method) of spatial structures, A geometrical nonlinear finite element method and some discussion is presented in this paper, a new phenomnon that C.Oran beam-column element can not solve cantiliever only bearing monment is firstly put forward and discussed. A nonlinear finite element program has also been developed by adopting VC++6.0 language.