| DOI | Trouver le DOI : https://doi.org/10.1121/10.0027550 |
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| Auteur | Rechercher : Laly, Zacharie; Rechercher : Mechefske, Chris; Rechercher : Ghinet, Sebastian1; Rechercher : Kone, Tenon Charly1; Rechercher : Atalla, Noureddine; Rechercher : Ashrafi, Behnam1Identifiant ORCID : https://orcid.org/0000-0002-8227-3170 |
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| Affiliation | - Conseil national de recherches du Canada. Aérospatiale
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| Format | Texte, Article |
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| Conférence | Joint Meeting 186th Meeting of the Acoustical Society of America and the Canadian Acoustical Association, May 13-17, 2024, Ottawa, Ontario, Canada |
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| Résumé | In this study, a double layer sandwich panels made of micro-perforated plate and perforated plate with extended necks is proposed and its acoustic attenuation is studied using the finite element method. The top panel of the structure is micro-perforated and is connected to a first honeycomb structure cells. The internal panel is perforated, and a neck is connected to each perforation and extends into each cell cavity of the second honeycomb structure. The proposed material design is made of 33 micro-perforations and 33 extended necks and has excellent mechanical stiffness due to the honeycomb structure performance. This study shows how to design the parameters of the necks and the micro-perforations to widen the sound absorption frequency band. With identical micro-perforation diameters and identical necks, the sound absorption coefficient presents two resonance peaks where the surface impedance is close to the impedance of air. The number of the sound absorption peaks increases when different micro-perforation diameters and different necks are used while the sound absorption of conventional double layer sandwich structure is zero over the entire frequency range. The proposed material design can be used to attenuate the noise in various engineering fields that require good bending stiffness. |
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| Date de publication | 2024-03-01 |
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| Maison d’édition | Acoustical Society of America |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 6dc2950a-46e3-426c-984a-9663b03c9ea7 |
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| Enregistrement créé | 2024-12-16 |
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| Enregistrement modifié | 2024-12-16 |
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