[提要] 沿用静力稳定分析中的“一致缺陷模态法”，通过单层球壳及单层鞍壳两个算例，分析了网壳结构分别在竖向地震和水平地震作用下，初始缺陷对其动力稳定性能的影响。
[关键词] 初始缺陷  地震作用  动力稳定分析

Based on the method for imperfection analysis just as used in the analysis of static stability, the effect of initial imperfection on the large displacement stability behavior of reticulated structures subjected to up-and-down earthquake and horizontal earthquake excitation is studied. Through two examples of a single-layer latticed dome and a single-layer latticed saddle shell, some conclusions are obtained finally.
Keywords: initial imperfection; earthquake excitation; analysis; dynamic stability