Application of Empirical Mode Decomposition for Structural Damage Detection:Experimental Investigation
This paper presents an experimental investigation on the applicability of the empirical mode decomposition(EMD)for identifying structural damage due to stiffness reduction.A three story steel building model was built and tested on a shaking table under various types of excitation,e.g.free vibration,random vibration,earthquake.Different structural damage scenarios were introduced to the structure by continually reducing the width of the structure column of the first and the second floor.Dynamic acceleration responses were measured at each floor during the experiment.The measurements were then analyzed by EMD to identify structural dynamic parameters of each test case.The identified modal parameters are compared with the theoretical values.The influence of excitation type,sensor location and computation parameters of intermittency check on the effectiveness of EMD has been discussed.The comparison reveals that the EMD is capable of identifying natural frequencies by change of which the structural damage can be identified.The successfully extraction of high vibration modes by EMD,however,is sensitive to the selection of computational parameter.
empirical mode decomposition damage detection building model shaking table test
Jun CHEN Guan-Yu ZHAO
Department of Building Engineering,Tongji University,Shanghai,200092,China
国际会议
The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)
重庆·南京
英文
2007-05-01（万方平台首次上网日期，不代表论文的发表时间）