ENGLISH
La vitrine de diffusion des publications et contributions des chercheurs de l'ÉTS
RECHERCHER

A semi-empirical model to predict the acoustic behaviour of fully and partially reticulated polyurethane foams based on microstructure properties

Téléchargements

Téléchargements par mois depuis la dernière année

Plus de statistiques...

Doutres, Olivier et Atalla, N.. 2012. « A semi-empirical model to predict the acoustic behaviour of fully and partially reticulated polyurethane foams based on microstructure properties ». In Proceedings of the Acoustics 2012 Nantes Conference : 11th Congrès Français d'Acoustique : 2012 IOA annual meeting (Nantes, France, Apr. 23-27, 2014) pp. 1955-1960. Société Française d'Acoustique.

[thumbnail of Doutres O 2012 8805 A semi-empirical model to predict.pdf]
Prévisualisation
PDF
Doutres O 2012 8805 A semi-empirical model to predict.pdf - Version acceptée
Licence d'utilisation : Tous les droits réservés aux détenteurs du droit d'auteur.

Télécharger (542kB) | Prévisualisation

Résumé

This work investigates the links between the microstructure of polyurethane foams and their sound absorbing efficiency, and more specifically the effect of membranes closing the cells. In a previous work, the authors proposed a semi-empirical approach to link the foam microstructure properties, i.e. reticulation rate, strut length and thickness, with its non-acoustic parameters. The study was based on the complete characterization of 15 isotropic polyurethane foams with various cell sizes and reticulation rates (i.e. open pore content). This paper proposes a validation of this semi-empirical model using 3 new polyurethane foams, not used in the first characterization set. More importantly, a simplification is presented to account only for the foam cell size and reticulation rate. Non-acoustic parameters estimated by the micro/macro links are also compared to direct and indirect measurements. It is shown that the proposed expressions associated to the Johnson-Champoux-Allard porous model allow for a good estimation of the sound absorbing behaviour of all tested polyurethane foams, fully reticulated or not.

Type de document: Compte rendu de conférence
ISBN: 978-2-919340-01-9
Professeur:
Professeur
Doutres, Olivier
Affiliation: Autres
Date de dépôt: 29 oct. 2014 18:00
Dernière modification: 07 nov. 2017 18:52
URI: https://espace2.etsmtl.ca/id/eprint/8805

Actions (Authentification requise)

Dernière vérification avant le dépôt Dernière vérification avant le dépôt