Volume 32 Issue 9
Sep.  2007
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GUO Hangzhong, CONG Peijiang. Application of Hilbert-Huang Transform in Analysis on Monitoring Data of Dam[J]. Geomatics and Information Science of Wuhan University, 2007, 32(9): 774-777.
Citation: GUO Hangzhong, CONG Peijiang. Application of Hilbert-Huang Transform in Analysis on Monitoring Data of Dam[J]. Geomatics and Information Science of Wuhan University, 2007, 32(9): 774-777.
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Application of Hilbert-Huang Transform in Analysis on Monitoring Data of Dam

  • 1 College of Water Conservancy and Hydropower Engineering,Hohai University,1 Xikang Road,Nanjing 210098,China

Funds: 国家自然科学基金资助项目(50539030-1-3,50579010);国家973计划资助项目(2002CB412707)
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  • Received Date: June 28, 2007
  • Revised Date: June 28, 2007
  • Published Date: September 04, 2007
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  • By using the Hilbert-Huang transform(HHT),a newly developed time-frequency analysis method for nonlinear and nonstationary time series is proposed,the monitoring data is analyzed in time-frequency domain.The monitoring data is decomposed into several intrinsic mode function(IMF) components fluctuating at different frequencies and a residual representing the trend of the data through the empirical mode decomposition(EMD).IMF components exhibit amplitude modulation and frequency modulation.The residual can reflect the local feature of the trend.The Hilbert spectrums of the monitoring data of environment variables and effect variables are similar.The amplitude modulation and frequency modulation of monitoring data reflect the nonlinearity and nonstationarity of the complex system composed of dam,rock and environments.
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