Engineering Transactions, 72, 2, pp. 203–224, 2024
10.24423/EngTrans.3207.2024

Wavelet Analysis of Ultrasonic Lamb Wave Displacements in Three-Layer Adhesive Plates: Continuous Wavelet Transform (CWT) versus the Semi-Analytical Finite Element Method (SAFEM)

Abdelali YACOUBI
Hassan I University
Morocco

Ayoub JABIRI
ORCID ID 0000-0002-8624-2339
Hassan I University
Morocco

Mustapha AZKOUR
ORCID ID 0009-0009-2545-7043
Hassan II University
Morocco

Rachid MANDRY
ORCID ID 0009-0006-1149-8811
Hassan I University
Morocco

Mhammed EL ALLAMI
ORCID ID 0009-0009-5774-9331
1) Hassan I University 2) Regional Center for Education and Training Professions (CRMEF)
Morocco

In this paper, we aim to identify the most appropriate mother wavelet for analyzing the displacements of ultrasonic guided waves in tri-layered adhesive plates.We determine the group velocities of a given mode using various mother wavelets. The precision of each mother wavelet is evaluated by comparing the values of the group velocities with those found by the semianalytical finite element method (SAFEM). The most appropriate mother wavelet function can then be used to study tri-layered adhesive plates with defects.
Keywords: Shannon wavelet; ultrasonic guided waves; bonded structures; signal processing; FEM
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Copyright © The Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0).

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DOI: 10.24423/EngTrans.3207.2024