双层柱面网壳整体稳定性分析

摘要

This paper makes a geometry and material non-linear analysis of the stability of a double layer cylindrical lattice shell by means of a finite element method. It also indicates the changing process of the structural strength, stability and rigidity through the load-displace- ment curve so as to ascertain the impact of the span ratio, load distribution and initial imper- fection on the critical load and draw a conclusion that is of significance for the engineering de- sign.%利用有限元方法，对双层柱面网壳的稳定性进行了几何和材料双重非线性分析，通过荷载一位移曲线将结构的强度、稳定性以及刚度的变化历程表现出来，以确定矢跨比、非对称荷载和初始缺陷等不同因素对结构临界荷载的影响，得出对工程设计有指导意义的结论．