| Issue |
MATEC Web Conf.
Volume 360, 2022
The 2nd International Conference on Non-Destructive Evaluation of Composite Structures (NDECS’2022)
|
|
|---|---|---|
| Article Number | 00005 | |
| Number of page(s) | 4 | |
| DOI | https://doi.org/10.1051/matecconf/202236000005 | |
| Published online | 24 June 2022 | |
Algebraic wavenumber identification method in presence of uncertainty
1
Ecole Centrale de Lyon, LTDS CNRS UMR 5513, Vibroacoustics & Complex Media Research Group, Ecully, France
2
Univ. Gustave Eiffel, Inria, COSYS-SII, I4S Team, Rennes, France
3
Ecole Centrale de Lyon, Institut Camille Jordan CNRS UMR 5208, Ecully, France
4
Univ. Bourgogne Franche-Comté, FEMTO-ST Institute, Department of Applied Mechanics, CNRS/UFC/ENSMM/UTBM, Besançon, France
* Corresponding author: xuefeng.li@ec-lyon.fr
This paper presents an algebraic wavenumber identification method to identify wavenumbers under stochastic conditions. Stochastic condition results from the introduction of small perturbation which is referred to the uncertainty of measurements points’ coordinates caused by the operation faults or problems with experimental errors. The proposed method is compared with two popular alternatives, namely: inhomogeneous wave correlation method and inverse convolution method which are both capable of extracting the bending wavenumbers of a meta-structure. A good performance is observed for the identification of complex wavenumbers in presence of uncertainty. In addition, the proposed method needs to solve a linear problem, reducing the computational cost compared to the inhomogeneous wave correlation method.
© The Authors, published by EDP Sciences, 2022
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