Damage Detection of Simply Supported Beam under Effect of Moving Load by Hilbert-Huang Transform

Abstract:

Hilbert-Huang transform (HHT) is a signal processing technique is relatively strong and effective today, to overcome the limitations of the used techniques have been widely used as traditional Fourier transform or Wavelet transform. Hilbert-Huang transform can handle effectively nonstationary and nonlinear signal. In this paper present how to use the HHT method to detect damage of the beams under the effect of moving load. Location damage is determined by observing changes in the first instantaneous frequency curve (IF1), damage location is the highest peak in the IF curve. This paper briefly described the theoretical basis and then applies through numerical simulation. These numerical simulations are simply supported beams damaged at different locations and with different levels of damage under the effect of the moving velocity case different. The results of numerical simulation shows relative accuracy compared with the theory and practice is assumed.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 984-993
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.984
• Online since: May 2012
• Authors: Han Bing Liu, Huu Hung Nguyen
• Keywords: Empirical Mode Decomposition (EMD), Hilbert-Huang Transform (HHT), IF, Intrinsic Mode Function (IMF), Nonstationary, Wavelet Transform (WT)

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