Post treatment of guided wave by using wavelet transform in the presence of a defect on surface

Autor:	Nsiri Benayad, Belhoussine Drissi Taoufiq, Marrakh Rachid, Zayrit Soumaya, Alouane Houda
Předmět:	Guided wave testing Lamb waves General Computer Science Morlet wavelet Computer science Acoustics Fast Fourier transform Wavelet transform Continuous wavelet transform Coherence (physics)
Zdroj:	Scopus-Elsevier
Popis:	This article presents a Lamb wave processing by using two methods: Fast Fourier Transform (FFT2D) and Continuous Wavelet Transform (CWT) using Morlet wavelet. This treatment is done for a structure of two aluminum-copper plates, which are in contact edge to edge of a perpendicular junction with a thickness “e” in the presence of a rectangular and symmetrical defect located on the surface of the junction with a depth “d”. The aim under this study is to calculate the transmission and reflection energy coefficients by the two methods. The results of simulation obtained by Comsol software of an incident wave S0 at F = 800 kHz indicate us a good coherence between the two methods (FFT2D and CWT).
Databáze:	OpenAIRE
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