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

Effect of variability in microgeometry of polyurethane foams on their macroscopic acoustic performance

Téléchargements

Téléchargements par mois depuis la dernière année

Plus de statistiques...

Gholami, Mohammad Sadegh, Doutres, Olivier et Atalla, Noureddine. 2016. « Effect of variability in microgeometry of polyurethane foams on their macroscopic acoustic performance ». In INTER-NOISE and NOISE-CON Congress and Conference Proceedings (NoiseCon16) (Rhodes Island, Greece, June 13-15, 2016) pp. 1086-1094. Institute of Noise Control Engineering.

[thumbnail of Doutres O 2016 14399 Effect of variability in microgeometry.pdf]
Prévisualisation
PDF
Doutres O 2016 14399 Effect of variability in microgeometry.pdf - Version acceptée
Licence d'utilisation : Tous les droits réservés aux détenteurs du droit d'auteur.

Télécharger (1MB) | Prévisualisation

Résumé

The numerical formulations used for the modeling and design of sound absorbing materials are constructed based on a set of physical parameters, known as the Biot's parameters (for isotropicmaterials these are comprised of 5 non-acoustical parameters and 4 mechanical parameters). These parameters are inter-correlated and are microstructure-dependent. There is in consequence a need for the development of links between the cellular structure of the foams and the Biot's parameters before realistically using these models for material-level optimization. In this sense, a microstructure-based model has been developed by Doutres et al. [J. Appl. Phys. 110, 064901 (2011)] to link the microstructure (thickness and length of struts and the closed windows content) of polyurethane (PU) foams to their non-acoustical parameters. In this study, this model is first extended to add the link between the microstructure and the mechanical properties of the foam. Next, a global sensitivity analysis using Fourier Amplitude Sensitivity Test (FAST) is performed to investigate the impact of the variability, associated with the irregularities in microstructure, on the sound absorption and transmission loss (TL) of the foam when combined with an elastic structure.

Type de document: Compte rendu de conférence
Professeur:
Professeur
Doutres, Olivier
Affiliation: Génie mécanique
Date de dépôt: 23 janv. 2017 16:34
Dernière modification: 23 nov. 2017 17:46
URI: https://espace2.etsmtl.ca/id/eprint/14399

Actions (Authentification requise)

Dernière vérification avant le dépôt Dernière vérification avant le dépôt