Spectrogram analysis of circumferential modes propagating around the cicular cylindrical shell immersed in water

Auteurs-es

  • M. Laaboubi
  • A. Dliou
  • R. Latif
  • E. Aassif
  • G. Maze

Résumé

Dans ce travail, nous exposons la possibilité de mettre œuvre la caractérisation d'un tube élastique à partir de la fréquence de coupure des ondes circonférentielles et des vitesses des ondes propageant dans le matériau constituant le tube. La représentation temps-fréquence de Spectrogramme est appliquée à un signal acoustique rétrodiffusé par un tube d’Aluminium afin de pouvoir identifier les ondes circonférentielle. La fréquence de coupure de chaque mode d'onde circonférentielle tels que : A1, A2 (modes antisymétriques) et S1 (mode symétrique) sont estimées à partir des images temps-fréquence de Spectrogramme puis elles sont comparées avec celles calculées par la théorie des modes propres. Les vitesses transversales et longitudinales du matériau en Aluminium, déterminées à partir des images temps-fréquence, sont en bon accord avec celles données dans la littérature scientifique.

Fichiers supplémentaires

Publié-e

2012-12-01

Comment citer

1.
Laaboubi M, Dliou A, Latif R, Aassif E, Maze G. Spectrogram analysis of circumferential modes propagating around the cicular cylindrical shell immersed in water. Canadian Acoustics [Internet]. 1 déc. 2012 [cité 14 juill. 2024];40(4):13-22. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2578

Numéro

Vol. 40 No. 4 (2012)

Rubrique

Articles techniques

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