【摘要】 索穹顶结构分析中 ,由于自重影响 ,常用单元已不能满足工程精度要求。本文考虑应变高阶量的影响 ,给出考虑自重作用下有初始垂度的多结点 (4结点以上 )非线性空间曲线元的形函数和大位移非线性几何方程。编制了相应计算程序。数值算例验证了公式、方法的正确性 ,且数值解精度高更多还原

【Abstract】 In the analysis of cable dome and other large span cable structure,it is unable to meet the demand of the accuracy with the conventional analytical model.In this paper,a nonlinear spatial curve high order element is presented,which the initial droop is considered by effect of body forces.The shape function and large deflection geometrically nonlinear equations of the cured element is given.Numerical example prove that the method is correct and numerical solutions are with high precision.更多还原