Structural damage identification based on anslysis of modal strain energy and wavelet transformation
YAN Ping1,2; LI Hu-sheng2; GE Ji-ping2; YE Qian-yuan1
1 School of environment and architecture, University of shanghai for science and technology, Shanghai, 200093, China;2 School of urban construction and safety engineering, Shanghai institute of technology, Shanghai, 200235, China
Abstract：Single method for structural multiple different degree damage identification is not sensitive to small defects. The paper presents an approach of structural damage identification based on modal strain energy and wavelet transformation characteristics to denote local signal in time domain or frequency domain and process any details of the signal or function. The structural damage index is given out with the change and distribution of wavelet transform coefficients based on elemental modal strain energy. Through the numerical simulation of a simply supported beam and a cable-stayed bridge model experiment study, the method compared with elemental modal strain energy method can effectively determine the structure multiple different degree damage location and estimate damage degree. The method research laid the foundation for the practical application of engineering
严 平;李胡生;葛继平;叶黔元. 基于模态应变能和小波变换的结构损伤识别研究[J]. , 2012, 31(1): 121-126.
YAN Ping;LI Hu-sheng;GE Ji-ping;YE Qian-yuan. Structural damage identification based on anslysis of modal strain energy and wavelet transformation. , 2012, 31(1): 121-126.
2012, Vol. 31 
