engleski

Strategy for Identification of Damping Ratio using Morlet Wave Damping Identification Method

A strategy for the identification of damping ratios in structures with a Morlet Wave Damping Identification method is proposed. Generally, this method is based on extracting damping ratios for a given natural frequency from only two wavelet coefficients. The considerable sensitivity of the identified values is noticed even for a small change of the parameters of the wavelet functions. To raise a certainty in the identified values we propose identification of damping ratio for the whole range of feasible wavelet functions parameters. Decision criteria are based on lowest fluctuation of the identified damping ratio. This strategy resulted in the raising the level of automation and reducing the operator interaction. Method is tested on the simulated responses and the experimentally measured responses. In both cases, the results of the damping ratios identification are compared with numerous independent traditional methods. Traditional identification methods applied in comparative analysis were available as in house code or commercial software.

Modal Analysis; Damping ratio; Identification; Continious wavelet transform; Gabor wavelet

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