Propagation number in periodic structures considering losses

Meresse, P.; Renou, Y.; Vasseur, Jerome O.; Audoly, C.; Hladky, Anne-Christine

Type de document :

Communication dans un congrès avec actes

DOI :

10.1088/1742-6596/581/1/012012

Titre :

Propagation number in periodic structures considering losses

Auteur(s) :

Meresse, P. []
Renou, Y. [Auteur]
Vasseur, Jerome O. [Auteur]
Audoly, C. [Auteur]
Hladky, Anne-Christine [Auteur]

Titre de la manifestation scientifique :

13th Anglo-French Physical Acoustics Conference (AFPAC) 2014

Ville :

Croydon

Pays :

Royaume-Uni

Date de début de la manifestation scientifique :

2014-01-15

Titre de l’ouvrage :

13th Anglo-French Physical Acoustics Conference (AFPAC) 2014

Éditeur :

IOP PUBLISHING LTD

Date de publication :

2015

Discipline(s) HAL :

Sciences de l'ingénieur [physics]

Résumé en anglais : [en]

The development of absorbing or reflecting panels is of interest for underwater acoustic stealth. Most of the time, losses are not considered in the structures studied, specifically in the propagation number determination, ...
Lire la suite >The development of absorbing or reflecting panels is of interest for underwater acoustic stealth. Most of the time, losses are not considered in the structures studied, specifically in the propagation number determination, despite the fact that most materials used, such as polymer matrices, have non negligible viscous losses. So, for a better understanding of the acoustic properties of these structures and to allow their optimization, simulations should consider the material properties, including losses. In order to obtain more realistic results from simulation, two numerical tools based on the finite element method (FEM) are proposed, with the help of the ATILA software. One is based on a differential method, the other on the transfer matrix. The two methods are first validated in the lossless case, then when losses are taken into account. Both methods give results in good agreement and give the propagation number where losses are taken into account.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL

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https://hal.archives-ouvertes.fr/hal-03300128/document
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https://doi.org/10.1088/1742-6596/581/1/012012
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https://doi.org/10.1088/1742-6596/581/1/012012
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