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《Journal of Zhejiang University(Engineering Science)》 2007-01
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Experimental study of time-frequency characteristic of wavelet transform

ZHU Bin~1,CHEN Yun-min~1,LEUNG Andrew Y.T.~2(1.Department of Civil Engineering,Zhejiang University,Hangzhou 310027,China;2.Department of Building and Construction,Zhejiang University,Hong Kong,China)  
A health monitoring and damage detection method using the time-frequency characteristic of the wavelet transform was presented based on the results of free vibration and random vibration tests of a system consisting of a cantilever plate and several springs.During vibration of the system,burning out the string connecting the spring to the plate resulted sudden damage to the structure.Discrete wavelet transform was used to recognize the damage at the moment it occurs.Subsequently,the shifts of frequencies and damping ratios were identified by continuous wavelet transform to study the amplitude of stiffness loss of the structure and make sure that the sudden change or impulse in the signal from the discrete wavelet transform was resulted from the damage but not the impulse noise.Test results showed that the proposed method is effective for health monitoring and damage detection of the considered structure.For the random forced vibration,the random decrement technique can be performed on the original signal to obtain the free decaying responses,and then the continuous wavelet transform can be applied to identify the structural parameters.The present method is free of modelling error and can be used for on-line health monitoring.
【Fund】: 国家自然科学基金资助项目(50608062);; 香港RGC基金资助项目(#CityU1278/03E)
【CateGory Index】: U446
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【Citations】
Chinese Journal Full-text Database 2 Hits
1 GUO Jian, SUN Bing-nan(Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China);Multi-scale analysis based on wavelet transform in bridge health monitoring[J];浙江大学学报(工学版);2005-01
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 Liu Xiaoyun;Zhang Xiangfen;Ma Yan;School of Information and Mechanical and Electrical Engineering,Shanghai Normal University;;PIPELINE LEAKAGE CHARACTERISTIC SIGNAL EXTRACTION BASED ON IMPROVED WAVELET PACKET ALGORITHM[J];计算机应用与软件;2015-05
2 Zhang Qi;Yan Wei;Wang Wei;Wang Wenxu;Tianjin Institute of Surveying and Mapping;;Analysis of the Sedimentation of Earth's Surface Based on CORS Data[J];城市勘测;2014-06
3 Xie Xu;Wu Dongyan;Zhang He;Sun Liangfeng;Department of Civil Engineering,Zhejiang University;Department of Municipal Traffic,Architecture Design and Research Institute of Zhejiang University;;Operational Modal Parameter Identification of Irregular Arch Bridge[J];振动.测试与诊断;2014-06
4 LIU Chuncheng;HOU Shangyu;GAO Fan;LI Wenqiang;HE Zhaowen;School of Civil Engineering and Architecture,Northeast Dianli University;;Numerical simulation study on damage identification of high-voltage transmission tower based on multi-scale analysis[J];自然灾害学报;2014-06
5 MIAO Changqing;TIAN Hongjin;XIAO Yingchun;LI Shaohua;School of Civil Engineering,Southeast University;Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education;Chinese Aircraft Strength Research Institute;;Multi-scale Analysis for Fiber Optic Strain Monitoring Signal Based on Wavelet Multi-Resolution Analysis[J];计测技术;2013-04
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7 CHE Hong-kun,LV Fu-zai,XIANG Zhan-qin(Institute of Modern Manufacturing Engineering,Zhejiang University,Hangzhou 310027,China);Time-frequency optimal feature extraction method based on SFFS algorithm for defects recognition[J];浙江大学学报(工学版);2011-12
8 LAN Hua1,WANG Bin2,JIAO Zi-yang1 (1.Electric Engineering Institute,Northeast Dianli University,Jilin 132012,China; 2.Shiyan Power Supply Company,Hubei Power Grid,Shiyan Hubei 442700,China);Application of wavelet-PSO to ferroresonance in power system[J];电源技术;2011-10
9 Yu Chongchong1,2,Wang Jingyan2,Tan Li2,Tu Xuyan1(1.University of Science and Technology Beijing,Beijing,100083,China;2.Beijing Technology and Business University,Beijing,100048,China);Bridge Structural Health Monitoring System Using Time-Frequency Analysis Method[J];数据采集与处理;2011-05
10 ZHANG Ning-ning1,CHEN Zhi-jian1,QI Shan-po2,BIAN Lei3(1.School of Earth Science and Engineering,Hohai University,Nanjing,210098,China;2.Central Southern China Electric Power Design Institute,Wuhan 430071,China;3.Shandong Electric Power Engineering Consulting Institute Corp,Ltd,Jinan 250013,China);Wavelet layered de-noising process of stress data of anchorage zone for Sutong Bridge[J];河海大学学报(自然科学版);2011-04
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Chinese Journal Full-text Database 4 Hits
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