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Modal identification of linear non-proportionally damped systems by wavelet transform

Abstract : A time-frequency identification technique based on wavelet transform is formulated and applied to free-decay responses of linear systems with non-proportional viscous damping. The Cauchy mother wavelet is used. Frequencies, modal damping ratios and complex mode shapes are identified from output-only free vibration signals. This identification technique has also shown to be effective when the (non-proportional) damping is significant.
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https://hal.archives-ouvertes.fr/hal-00345307
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Submitted on : Monday, December 8, 2008 - 6:23:25 PM
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Silvano Erlicher, Pierre Argoul. Modal identification of linear non-proportionally damped systems by wavelet transform. Mechanical Systems and Signal Processing, Elsevier, 2007, 21, pp.1386-1421. ⟨10.1016/j.ymssp.2006.03.010⟩. ⟨hal-00345307⟩

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