沈晓明，舒赣平
    (东南大学土木工程学院，南京210096)

[摘要] 本文以某实际工程的不规则划分单层网壳结构为研究对象，利用有限元程序ANSYS进行线性特征值屈曲分析，预测结构的理论屈曲强度，考察网壳的屈曲模态，屈曲路径，再按照一致缺陷模态法引入了结构的初始缺陷，在满跨荷载和半跨活荷载作用下，对结构进行非线性有限元全过程跟踪分析，得到极限荷载，初步了解不规则划分单层网壳结构失稳的一般规律。
[关键词] 不规则划分；特征值屈曲分析；一致缺陷模态法；全过程跟踪分析

    Stability Analysis of Single Layer Lattice Shell With Irregular Division
    Shen Xiaoming, Shu Ganping
    ( College of Civil Engineering, Southeast University,  Nanjing  210096)

Abstract: Based on the actual project-one single layer lattice shell with irregular division, this paper has camed out eigenvalue buckling analysis with ANSYS finite element analysis program, predicted the structural theoretical buckling strength, observed buckling models and paths of single layer lattice shell, and applied initial imperfection on the structure according to consistent mode imperfection method. Finally, under full span load and half-span load, in order to get critical load, all course tracing by nonlinear element has been camed out, so we grasped preliminary the general rules of instability of the single layer lattice shell with irregular division.
Keywords: irregular division; eigenvalue buckling analysis; consistent mode imperfection method; all course tracing analysis