Theo Cavalieri, Jean Boulvert, Gwénaël Gabard, Vicente Romero-Garcia, Marie Escouflaire, Josselin Regnard et Jean-Philippe Groby
Article de revue (2020)
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Libre accès au plein texte de ce document Version officielle de l'éditeur Conditions d'utilisation: Creative Commons: Attribution (CC BY) Télécharger (2MB) |
Abstract
The design of graded and anisotropic materials has been of significant interest, especially for sound absorption purposes. Together with the rise of additive manufacturing techniques, new possibilities are emerging from engineered porous micro-structures. In this work, we present a theoretical and numerical study of graded and anisotropic porous materials, for optimal broadband and angular absorption. Through a parametric study, the effective acoustic and geometric parameters of homogenized anisotropic unit cells constitute a database in which the optimal anisotropic and graded material will be searched for. We develop an optimization technique based on the simplex method that is relying on this database. The concepts of average absorption and diffuse field absorption coefficients are introduced and used to maximize angular acoustic absorption. Numerical results present the optimized absorption of the designed anisotropic and graded porous materials for different acoustic targets. The designed materials have anisotropic and graded effective properties, which enhance its sound absorption capabilities. While the anisotropy largely enhances the diffuse field absorbing when optimized at a single frequency, graded properties appear to be crucial for optimal broadband diffuse field absorption.
Mots clés
anisotropic materials; optimized absorption; diffuse field; graded properties
Sujet(s): | 2100 Génie mécanique > 2100 Génie mécanique |
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Département: | Département de génie mécanique |
Centre de recherche: | LAVA - Laboratoire d'analyse vibratoire et acoustique |
Organismes subventionnaires: | ANR Chaire industrielle MACIA |
Numéro de subvention: | ANR-16-CHIN-0002 |
URL de PolyPublie: | https://publications.polymtl.ca/9402/ |
Titre de la revue: | Materials (vol. 13, no 20) |
Maison d'édition: | MDPI |
DOI: | 10.3390/ma13204605 |
URL officielle: | https://doi.org/10.3390/ma13204605 |
Date du dépôt: | 16 août 2023 13:23 |
Dernière modification: | 09 avr. 2024 05:01 |
Citer en APA 7: | Cavalieri, T., Boulvert, J., Gabard, G., Romero-Garcia, V., Escouflaire, M., Regnard, J., & Groby, J.-P. (2020). Graded and anisotropic porous materials for broadband and angular maximal acoustic absorption. Materials, 13(20), 19 pages. https://doi.org/10.3390/ma13204605 |
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