EFFECT OF VARIABILITY IN MICRO-GEOMETRY OF POLYURETHANE FOAMS ON THE DOUBLE WALL TRANSMISSION LOSS

Authors

  • Mohammad Sadegh Gholami <p>Université de Sherbrooke</p>
  • Olivier Doutres <span>École de technologie supérieure</span>
  • Noureddine Atalla Professeur

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.

Author Biographies

Mohammad Sadegh Gholami, <p>Université de Sherbrooke</p>

Mechanical engineering department,Ph.D. candidate

Olivier Doutres, <span>École de technologie supérieure</span>

Professeur

Noureddine Atalla, Professeur

Université de Sherbrooke

Additional Files

Published

2016-08-24

How to Cite

1.
Gholami MS, Doutres O, Atalla N. EFFECT OF VARIABILITY IN MICRO-GEOMETRY OF POLYURETHANE FOAMS ON THE DOUBLE WALL TRANSMISSION LOSS. Canadian Acoustics [Internet]. 2016 Aug. 24 [cited 2024 Dec. 2];44(3). Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2921

Issue

Vol. 44 No. 3 (2016)

Section

Proceedings of the Acoustics Week in Canada

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