Identification of multiple cracks in composite beams using discrete wavelet transform
نویسندگان
چکیده
A method for the identification of multiple cracks based on Discrete Wavelet Transform is presented. The analysis is provided on beams made of polymeric laminate. The estimation of the crack locations is based on the evaluation of natural modal shapes of pre-cracked beams. The modal shapes were estimated experimentally using laser Doppler vibrometry. The dynamic response of multi-cracked beams is processed using Discrete Wavelet Transform and detail coefficients are considered for the crack identification. Next, the methods of detail coefficients denoising are discussed. The principles of the selection of the appropriate wavelet are investigated. The proposed method indicates effectiveness in multiple crack identification and could be applied in industrial solutions of structural health monitoring as well.
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