基于小波变换的爆破振动时频特征分析
|
摘要
应用小波变换方法对短时非平稳爆破振动过程提出了时频特征分析。根据离散小波变换的分层分解展开关系,将爆破振动时间历史信号用分层重构信号进行扫描。应用这些信号可以给出不同频率带上爆破振动的相对能量分布和振动强度的时间变化规律。一个爆破振动实测结果的分析表明,与建立在传统Fourier变换基础上的频谱分析方法相比,基于小波变换的爆破振动时频特征分析可以给出更为准确的细节信息。文中的研究结果为爆破振动结构安全性分析提供了新的途径。
The time-frequency process of blasting vibration is a nonstationary random one with short duration, and analysis is made on the process by means of wavelet transform technique. According to the multiresolution decomposition of discrete wavelet transform,the time history signal of blasting vibration may be expressed by different level reconstructed signals of wavelet decomposition. By using these signals,the relative energy distributions of blasting vibration in different frequency bands and the regularity of vibration strength varying with time can be obtained. Blasting vibration measurement shows that the time-frequency characteristic analysis based on wavelet transform yields more accurate information details of blasting vibration,compared with the frequency spectra analysis on the conventional Fourier transform. The suggested method provides a new approach for analyzing the structural safety under blasting vibration conditions.
The time-frequency process of blasting vibration is a nonstationary random one with short duration, and analysis is made on the process by means of wavelet transform technique. According to the multiresolution decomposition of discrete wavelet transform,the time history signal of blasting vibration may be expressed by different level reconstructed signals of wavelet decomposition. By using these signals,the relative energy distributions of blasting vibration in different frequency bands and the regularity of vibration strength varying with time can be obtained. Blasting vibration measurement shows that the time-frequency characteristic analysis based on wavelet transform yields more accurate information details of blasting vibration,compared with the frequency spectra analysis on the conventional Fourier transform. The suggested method provides a new approach for analyzing the structural safety under blasting vibration conditions.
引文
1DowdingC H.BlastVibrationMonitoring andControl[M].EnglewoodCliffs:Prentice-Hall,1985,1～5
2李翼祺,马素贞.爆炸力学[M].北京:科学出版社,1992,441～443
3BolingerG A.爆炸振动分析[M].刘锡荟,熊建国译.北京:科学出版社,1975,93～95
4 张雪亮，黄树棠. 爆破地震效应[M]. 北京：地震出版社，1981，72～138
5 Kim D S，Lee J S. Propagation and attenuation characteristics ofvarious ground vibrations[J]. Soil Dynamics and EarthquakeEngineering，2000，19(1)：115～126
6 Lu Y，Hao H，Ma G，et al. Simulation of structural response underhigh-frequency ground excitation[J]. Earthquake Engng Struct Dyn.，2001，30(2)：307～325
7 汪旭光，于亚伦. 关于爆破震动安全判据的几个问题[J]. 工程爆破，2001，7(2)：88～92
8 张贤达，保 铮. 非平稳信号分析与处理[M]. 北京：国防工业出版社，1998，224～258
9 Gaupillaud P，Grossmann A，Morlet J. Cycle-octave and relatedtransforms in seismic signal analysis[J]. Geoexploration，1984，23(1)：85～102
10 Grossmann A，Morlet J. Decomposition of hardy functions into squareintegrable wavelets of constant shape[J]. SIAM J. Math. Anal.，1984，23(5)：723～736
11 Mallat S. Multiresolution approximation and wavelets[J]. Trans. Am.Math. Soc.，1989，315(1)：69～88
12 Mallat S，Zhong S. Signal characterization from multiscale edges[A]. In：Proceedings of the 10th International Conference on PatternRecognition[C]. Atlantic City：IEEE Computing Society Press，1990，891～896
13 Daubechies I. Wavelet transform，time-frequency localization andsignal analysis[J]. IEEE Transactions on Information Theory，1990，36(5)：961～1005
14 Newland D E. Wavelet analysis of vibration，part 1：theory[J]. J.Vibration and Acoustics Trans. of ASME，1993，116(4)：409～416
15 Newland D E. Wavelet analysis of vibration，part 2：wavelet maps[J].J. Vibration and Acoustics Trans. of ASME，1993，116(4)：417～425
16 Basu B，Gupta V K. Stochastic seismic response of single-degree-offreedom systems through wavelets[J]. Engineering Structures，2000，22(10)：1 714～1 722
17 Gurley K ， Kareem A. Applications of wavelet transforms inearthquake，wind and ocean engineering[J]. Engineering Structures，1999，21(2)：149～167
18 黄文华，徐全军，沈 蔚等. 小波变换在判断爆炸地震危害中的应用[J]. 工程爆破，2001，7(1)：24～27
19 何 军，于亚伦，梁文基. 爆破震动信号的小波分析[J]. 岩土工程学报，1998，20(1)：47～50
20 Iyama J，Kuwamura H. Application of wavelets to analysis andsimulation of earthquake motions[J]. Earthquake Engng. Struct. Dyn.，1999，28(2)：255～272
2李翼祺,马素贞.爆炸力学[M].北京:科学出版社,1992,441～443
3BolingerG A.爆炸振动分析[M].刘锡荟,熊建国译.北京:科学出版社,1975,93～95
4 张雪亮，黄树棠. 爆破地震效应[M]. 北京：地震出版社，1981，72～138
5 Kim D S，Lee J S. Propagation and attenuation characteristics ofvarious ground vibrations[J]. Soil Dynamics and EarthquakeEngineering，2000，19(1)：115～126
6 Lu Y，Hao H，Ma G，et al. Simulation of structural response underhigh-frequency ground excitation[J]. Earthquake Engng Struct Dyn.，2001，30(2)：307～325
7 汪旭光，于亚伦. 关于爆破震动安全判据的几个问题[J]. 工程爆破，2001，7(2)：88～92
8 张贤达，保 铮. 非平稳信号分析与处理[M]. 北京：国防工业出版社，1998，224～258
9 Gaupillaud P，Grossmann A，Morlet J. Cycle-octave and relatedtransforms in seismic signal analysis[J]. Geoexploration，1984，23(1)：85～102
10 Grossmann A，Morlet J. Decomposition of hardy functions into squareintegrable wavelets of constant shape[J]. SIAM J. Math. Anal.，1984，23(5)：723～736
11 Mallat S. Multiresolution approximation and wavelets[J]. Trans. Am.Math. Soc.，1989，315(1)：69～88
12 Mallat S，Zhong S. Signal characterization from multiscale edges[A]. In：Proceedings of the 10th International Conference on PatternRecognition[C]. Atlantic City：IEEE Computing Society Press，1990，891～896
13 Daubechies I. Wavelet transform，time-frequency localization andsignal analysis[J]. IEEE Transactions on Information Theory，1990，36(5)：961～1005
14 Newland D E. Wavelet analysis of vibration，part 1：theory[J]. J.Vibration and Acoustics Trans. of ASME，1993，116(4)：409～416
15 Newland D E. Wavelet analysis of vibration，part 2：wavelet maps[J].J. Vibration and Acoustics Trans. of ASME，1993，116(4)：417～425
16 Basu B，Gupta V K. Stochastic seismic response of single-degree-offreedom systems through wavelets[J]. Engineering Structures，2000，22(10)：1 714～1 722
17 Gurley K ， Kareem A. Applications of wavelet transforms inearthquake，wind and ocean engineering[J]. Engineering Structures，1999，21(2)：149～167
18 黄文华，徐全军，沈 蔚等. 小波变换在判断爆炸地震危害中的应用[J]. 工程爆破，2001，7(1)：24～27
19 何 军，于亚伦，梁文基. 爆破震动信号的小波分析[J]. 岩土工程学报，1998，20(1)：47～50
20 Iyama J，Kuwamura H. Application of wavelets to analysis andsimulation of earthquake motions[J]. Earthquake Engng. Struct. Dyn.，1999，28(2)：255～272
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心