INSTANTANEOUS INDICATORS OF STRUCTURAL BEHAVIOUR BASED ON THE CONTINUOUS CAUCHY WAVELET ANALYSIS
✍ Scribed by PIERRE ARGOUL; THIEN-PHU LE
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 427 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0888-3270
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✦ Synopsis
In this contribution, four instantaneous indicators are proposed to characterize the nonlinear behaviour of mechanical structures from their transient responses. These indicators are developed from the Cauchy wavelet analysis of the accelerometric responses of the structure. They are based on the notion of ridges and skeletons introduced for the wavelet processing of signals that are assumed to be defined as a sum of asymptotic amplitude and phase-modulated terms. The proposed indicators are then applied to the data collected at the University of Li" e ege. Some preliminary results are given for the characterization of the non-linear behaviour of the beam.