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《Explosion and Shock Waves》 2007-05
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Analysis on features of energy distribution for blasting seismic wave based on wavelet transform

YAN Jun-wei,LONG Yuan,FANG Xiang,ZHOU Chun-hua (Engineering Institute of Engineering Corps,University of Science & Technology of PLA,Nanjing 210007,Jiangsu,China)  
The features of energy distribution for blasting seismic wave which is short-time non-stationary random signal are analysed by wavelet transform technique.According to the time-frequency characteristic and multiresolution decomposition of discrete wavelet transform,the signal history of blasting seismic wave is expressed by different level reconstructed signals of wavelet decomposition.By using these signals,the relative energy distribution of blasting seismic wave in different frequency bands and the regularity of vibration strength varying with time is obtained.Blasting seismic wave measurement shows that the time-frequency characteristic analysis based on wavelet transform yields more accurate information of blasting seismic wave.The suggested method provides a new approach for analyzing the structural safety under blasting vibration conditions.
【Fund】: 国家自然科学基金项目(10372217)
【CateGory Index】: TB41;O389
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