基于复形法的大跨屋盖结构有限元模型修正研究  

Finite element model updating for large span roof structures based on complex method

作　　者：张志华[1] 傅继阳[1] 饶瑞[1] 徐安[1] 

机构地区：[1]广州大学广州大学-淡江大学工程结构灾害与控制联合研究中心,广州510006

出　　处：《建筑结构》2013年第10期21-25,30,共6页Building Structure

基　　金：国家自然科学基金项目(50978063);教育部新世纪优秀人才支持计划(NCET-09-0082);霍英东教育基金会高等院校青年教师基金(11072)

摘　　要：根据环境振动测试的模态数据,采用复形法对广州国际体育演艺中心屋盖结构进行有限元模型修正研究,并与ANSYS一阶算法、改进BP神经网络算法和粒子群算法(PSO)修正有限元模型进行对比分析。研究结果表明:修正后的有限元模型的模态频率与实测的模态数据吻合较好,复形法可以作为大跨屋盖结构有限元模型修正的一种有效方法。According to the identified model parameters from full-scale measurements of structural vibrations,the complex method was employed to update the finite element model（FEM） of the roof of Guangzhou International Sports Arena.For the purpose of comparison,the results of some other conventional algorithms including ANSYS first-order algorithm,improved BP neural network algorithm and PSO algorithm were also presented.The results show that the modal frequencies of the updated finite element model（FEM） agree well with that from full-scale measurements,and the complex method can be used as an efficient way of FEM updating for large span roof structures.

关 键 词：复形法 大跨屋盖结构 有限元模型修正 

分 类 号：TU393.3[建筑科学—结构工程]