东南大学学报（英文版）2009，Vol.25Issue(1)：104-107,4.
基于结构健康监测系统的悬索桥运行模态识别
Operational modal identification of suspension bridge based on structural health monitoring system
摘要
Abstract
An output-only modal idenfification method by a combination use of the peak-picking method and the cross spectrum methods are presented.Meanwhile,a novel mode shape optimum method of the deck is proposed.The methods are applied to the operational modal identification system of the Runyang Suspension Bridge,which can be used to obrain the modal parameters of the bridge from out-only data sets collected by its structural health monitoring system(SHMS).As an example,the vibration respcIrise data of the deck,cable and tower recorded during typhoon Matsa excitation are used to illustrate the program application.Some of the modal frequencies observed from deck vibration responses ale also found in the vibration responses of the cable and the tower.The results show that some modal shapes of the deck are strongly coupled with the cable and the tower.By comparing the identification results from the operational modal system with those from field measurements,a good agreement between them is achieved.but some modal frequencies identificd from the operational modal identification syrstem(OMIIS),such as L1 and L2,obviously decrease compared with those from the field measurements.关键词
悬索桥/运行模态识别/结构健康监测系统/环境振动测试Key words
suspension bridge/operational modal identification/structural health monitoring system/ambient vibration test分类
交通工程引用本文复制引用
李枝军,李爱群,韩晓林..基于结构健康监测系统的悬索桥运行模态识别[J].东南大学学报（英文版）,2009,25(1):104-107,4.基金项目
The National High Technology Research and Develop-ment Program of China(863 Program)(NO.2006AA042416). （863 Program）
