Doutres, Olivier et Dauchez, Nicolas.
2005.
« Modelling of the acoustic radiation of a structure covered by a porous layer ».
In Noise and Vibration : Emerging Methods (NOVEM) (St-Raphael, France, Apr., 2005)
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Résumé
To predict noise in enclosure containing treated vibrating panels, porous layer effect has to be taken into account. This study propose an analytical model of the effects of a porous layer on a vibrating plate by separating the acoustical and vibratory behaviours. This paper deals with acoustic coupling by means of surface impedance derived by a one-dimensional model using ”Biot-Allard” theory. It is shown that this impedance is different from that calculated when the porous is backed by an impervious rigid wall. The total radiation efficiency of a circular plate characterized by the surface impedance, clamped in a rigid infinite baffle, is computed and compared with experimental measurements. This model shows good agreement with experimental datas.
| Type de document: | Compte rendu de conférence |
|---|---|
| Professeur: | Professeur Doutres, Olivier |
| Affiliation: | Autres |
| Date de dépôt: | 29 oct. 2014 17:52 |
| Dernière modification: | 07 nov. 2017 18:48 |
| URI: | https://espace2.etsmtl.ca/id/eprint/8809 |
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