Huang变换在地震波信号纠偏中的应用
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摘要
一种新的信号处理方法Huang变换能够提取信号的均值或趋势,而对地震加速度记录进行二次积分得到较长时间内的位移时程会“飘离”零线,据此通过Huang变换后固有模态函数分量信息重构推导Huang变换在地震波信号纠偏中的原理.为了验证其应用性,从波形、反应谱和结构位移反应进行实例比较分析,结果得出Huang变换在地震波信号纠偏中有一定的应用前景.
A new time-series method,namely Huang transform can pick up the mean value or trend of signals. The displacement time history curve got by integrating an original acceleration data can usually deviate from time axes.The paper educes the principle that Huang transform is applied in earthquake signal correction from the reconstruction of intrinsic mode function.To verify its application,we compared curve shapes,their response spectra and structural displacement response by examples.The results showed that Huang transform is promising in earthquake signal correction.
A new time-series method,namely Huang transform can pick up the mean value or trend of signals. The displacement time history curve got by integrating an original acceleration data can usually deviate from time axes.The paper educes the principle that Huang transform is applied in earthquake signal correction from the reconstruction of intrinsic mode function.To verify its application,we compared curve shapes,their response spectra and structural displacement response by examples.The results showed that Huang transform is promising in earthquake signal correction.
引文
[1] United States Geological Survey. Data processing [ DB/OL]. http://nsmp.wr.usgs.gov/smcfmt.html,2004-04-13.
[2] Huang N E,Shen Z,Long S R,et al.The empirical mode decompositionand the Hilbert spectrum for nonlinear and non-station time seriesanalysis[J].Proc R Soc,1998,A454:903-995.
[3]石春香.HHT变换及其在结构分析中的应用[D].上海:同济大学结构工程与防灾研究所,2004.SHI Chun-xiang. Hilbet-Huang transform and its application in thestructural analysis[D].Shanghai:Research Institute of Structural En-gineering and Disaster Reduction,Tongji University,2004.
[4] Converse April M, Brady A Gerald. Basic strong-motion accelerogramprocessing software[M].[s.l.]:United States Department of the Inte-rior Geological Survey,1992.
[2] Huang N E,Shen Z,Long S R,et al.The empirical mode decompositionand the Hilbert spectrum for nonlinear and non-station time seriesanalysis[J].Proc R Soc,1998,A454:903-995.
[3]石春香.HHT变换及其在结构分析中的应用[D].上海:同济大学结构工程与防灾研究所,2004.SHI Chun-xiang. Hilbet-Huang transform and its application in thestructural analysis[D].Shanghai:Research Institute of Structural En-gineering and Disaster Reduction,Tongji University,2004.
[4] Converse April M, Brady A Gerald. Basic strong-motion accelerogramprocessing software[M].[s.l.]:United States Department of the Inte-rior Geological Survey,1992.
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