摘要
稳定性分析是网壳结构分析中的重要内容。文中网壳为拱梁与单层网壳形成的组合空间结构,结构形式较为复杂。利用有限元程序对该网壳进行了整体稳定分析。首先对该结构的两种模型进行了特征值屈曲分析,比较了两种模型的结果,预测结构的理论屈曲强度;然后考虑网壳的屈曲模态,考虑一致缺陷模态法并引入不同的结构初始缺陷,对结构进行非线性有限元全过程跟踪分析,初步了解该网壳结构失稳的一般规律。
Stability analysis is important in the analysis of latticed shell structures.In the paper,the latticed shell is a complicated composite spatial structure composing of arched beam and single-layer latticed shell.Overall stability analysis is carried out with finite element analysis software.Firstly,buckling analysis is taken respectively with two different analysis models,the analysis results are compared,and the theoretical buckling strength is predicted.Then,the full-range nonlinear analysis is taken considering buckling mode and initial defect according to always defect mode method.The general rule of the instability of the latticed shell structure is studied.
出处
《结构工程师》
2011年第3期36-40,共5页
Structural Engineers
关键词
单层网壳
稳定性分析
一致缺陷模态法
全过程分析
single-layer latticed shell
stability analysis
always defect mode method
full-range analysis
