南京工业大学学报（自然科学版）2013，Vol.35Issue(4)：91-96,6.DOI:10.3969/j.issn.1671-7627.2013.04.019
大跨空间结构风致动力稳定分析
Wind-induced dynamic stability analysis of large-span space structure
摘要
Abstract
The dynamic stability of large-span space structure under static random numerical wind field was studied and then compared with that of the static whole process analysis.By taking a space-truss structure as an example,the eigenvalue analysis of the structure was conducted by Abaqus.The whole process stability of the structure under the conditions of nonlinear and initial defects was then analyzed by using the improved arc-length method.Therefore the instability ultimate load of the structure could be preliminarily determined.Finally,the elastic-plastic time-history analysis of the structure under each wind load was conducted by incremental dynamic method and the dynamic instability ultimate load of the structure was determined by Budiansky-Roth(B-R) criteria.The results showed that buckling load factor decreased 10％ under nonlinear condition and ultimate load decreased 29％ when fluctuating wind was considered.Both material nonlinearity and geometric nonlinearity had great impact on the dynamic stability of structure,and the analysis of such problems by static methods tends to unsafe.The stability analysis of space-truss structure under wind load must be carried out by dynamic method.关键词
网架结构/静力稳定分析/风荷载时程/动力稳定分析/B-R准则Key words
space-truss structure/static stability analysis /wind load time-history/dynamic stability analysis / B-R criteria分类
建筑与水利引用本文复制引用
陈宇峰,杨凌成,王曙光..大跨空间结构风致动力稳定分析[J].南京工业大学学报（自然科学版）,2013,35(4):91-96,6.基金项目
福建省科技重点项目(2009H0008) （2009H0008）
国家自然科学基金(51178219,509508115) （51178219,509508115）
