Effect of variability in micro-geometry of polyurethane foams on the double wall transmission loss

Gholami, Mohammad Sadegh, Doutres, Olivier et Atalla, Noureddine. 2016. « Effect of variability in micro-geometry of polyurethane foams on the double wall transmission loss ». [Conference paper]. Canadian Acoustics = Acoustique Canadienne, vol. 44, nº 3. pp. 178-179.

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Abstract

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 isotropic materials 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, 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 TL of double wall system.

Item Type:	Peer reviewed article published in a journal
Additional Information:	Thématique : Proceedings of the Acoustics Week in Canada
Professor:	Professor Doutres, Olivier
Affiliation:	Génie mécanique
Date Deposited:	04 Jan 2017 17:15
Last Modified:	24 Aug 2017 19:43
URI:	https://espace2.etsmtl.ca/id/eprint/14211

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