网壳结构稳定分析的建模

An investigation on modeling for instability analysis of reticulated

本文主要研究了网壳结构的稳定分析的建模基础,因为建模基础决定了稳定分析的策略,也决定了稳定分析的正确性和精度。文中在回顾了基本概念的基础上提出了软化区、临界应力的概念和基于机构位移分析的屈曲路线跟踪技术,并给出了软化区的判断原则和临界应力的定义以及平衡路线、屈曲路线跟踪过程和技术。本文所提出的理论和方法可作为稳定分析的应用基础。

Tracing procedure modeling is the basis of the strategy of instability analysis and results in correctness and precision of the solution. In this paper after having reviewed the basic concepts and studied the modeling for instability analysis of single layer reticulated shells,the authors present some concepts of softening region in a structure and critical stress. The determination of softening region and definition of critical stress are stipulated and the technology for tracing buckling path on analysis of mechanism displacement is provided as well.