摘要
由于现在的计算机硬件和程序开发平台相对于过去有了很大的改进,因此,对于承受均布荷载的索网结构,有必要采用更精确的有限单元模型,对过去的简化两节点模型进行改进。本文作者采用五节点曲线单元模型建立了索网结构有限元模式,自编了程序,对索网结构考虑其自重作用下进行找形,并和原来两节点不考虑自重作用找形分析的结果作了比较,结果证明,自重对找形有一定的影响。
Because the capacity of the computer hardware and program developer has been greatly improved in the recent years,twonode finite element model should be replaced by the fivenode element model which is more precise for the cable structures sustaining uniform load.Therefore,by means of incremental nonlinear finite element U.L.method based on the updated total lagrangian formulation,the theory of fivenode curved finite element has been derived and nonlinear equation computation is achievedr.Formfinding for cable net structures considering self weight is carried out by a fortran program and numerical results have shown that the pressent model is of high precision by comparison with twonode element model.
出处
《四川建筑科学研究》
2003年第2期29-31,共3页
Sichuan Building Science
关键词
悬索结构
几何非线性
有限元
找形分析
cable structures
geometric nonlinear finite element
form finding
