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Smart Structures and Systems
  Volume 8, Number 3, September 2011 , pages 253-274

Using harmonic class loading for damage identification of plates by wavelet transformation approach
S.B. Beheshti-Aval, M. Taherinasab, and M. Noori

    In this paper, the harmonic displacement response of a damaged square plate with all-over partthrough damage parallel to one edge is utilized as the input signal function in wavelet analysis. The method requires the properties of the damaged plate, i.e., no information about the original undamaged structure is required. The location of damage is identified by sudden changes in the spatial variation of transformed response. The incurred damage causes a change in the stiffness or mass of the plate. This causes a localized singularity which can be identified by a wavelet analysis of the displacement response. In this study via numerical examples shown by using harmonic response is more versatile and effective compared with the static deflection response, specially in the presence of noise. In the light of the obtained results, suggestions for future work are presented and discussed.
Key Words
    damage detection; Wavelet Transform; harmonic excitation.
S.B. Beheshti-Aval and M. Taherinasab : Faculty of Civil Engineering, Earthquake Department, K.N.Toosi University of Technology, Tehran, Iran
M. Noori:College of Engineering, California Polytechnic State University, San Luis Obispo, California, USA

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