Automated modal identification based on eigensystem realization algorithm

摘要：

　　The subject of automated operational modal analysis has attracted an increasing attention,especially in the field of civil engineering.In this paper,an automated modal identification methodology,based on eigensystem realization algorithm(ERA)and a multi-stage clustering strategy is proposed.Three crucial steps are addressed in this study.In the first phase,plenty of modal candidates containing all physical modes as well as spurious modes are identified from parametric models with different orders.Subsequently,the fuzzy C-means(FCM)clustering is employed to distinguish possibly physical modes from spurious modes.The hierarchical clustering is applied in the final stage to obtain the representative modes of the individual structural properties efficiently.No user-specified parameter is required to single out physical modes.A practical engineering example of modal estimation for the Zhaobaoshan Bridge in Ningbo,China,is utilized to verify the availability of the proposed method.

关键词： eigensystem realization algorithm automated modal ident ification multi-stage clustering

作者: Xiao-Mei Yang Chun-Xu Qu Ting-Hua Yi Hong-Nan Li

作者单位: School of Civil Engineering,Dalian University of Technology,Dalian,China School of Civil Engineering,Dalian University of Technology,Dalian,China;School of Civil Engineering School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China

会议类型: 国际会议

会议名称: The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)

会议地点: 青岛

会议语种:英文

页码: 238-247

在线出版日期: 2018-07-22（万方平台首次上网日期，不代表论文的发表时间）