Damage detection for time-varying strutures based on the synchrosqueezing wavelet transform

被引：0
|
作者：
Liu J. [1 ]
Ren W. [2 ]
Huang W. [1 ]
Huang Z. [1 ]
Xu X. [1 ]
机构：
[1] School of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou
[2] School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2017年 / 36卷 / 21期
关键词：
Instantaneous frequency; Modal participation factor ratio; Synchrosqueezing wavelet transform; Time-varying damage detection; Wavelet total energy;
D O I：
10.13465/j.cnki.jvs.2017.21.002
中图分类号：
学科分类号：
摘要：
A new damage detection method for time-varying structures based on the synchrosqueezing wavelet transform was proposed. The wavelet total energy index was employed to detect damage locations, and then the synchrosqueezing wavelet transform was performed on the response signals at the structural damage locations. As a result, the instantaneous frequencies were extracted and individual component signals were reconstructed. A new time-varying damage index(TVDI) was defined based on the extracted instantaneous frequencies and modal participation factor ratio calculated from the reconstructed individual components. A simply supported beam structure with abrupt and linear time-varying damage was simulated numerically to verify the effectiveness of the presented method. The results demonstrate that the defined time-varying damage index can effectively detect damage locations and track structural time-varying damages. © 2017, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：8 / 15and33
页数：1525
相关论文
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