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A finite element model of perforated panel absorbers including viscothermal effects

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A finite element model of perforated panel absorbers including viscothermal effects

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dc.contributor.author Carbajo San Martín, Jesús es_ES
dc.contributor.author Ramis Soriano, Jaime es_ES
dc.contributor.author Godinho, Luis es_ES
dc.contributor.author Amado-Mendes, Paulo es_ES
dc.contributor.author Alba Fernández, Jesús es_ES
dc.date.accessioned 2016-09-05T14:15:36Z
dc.date.available 2016-09-05T14:15:36Z
dc.date.issued 2015-04-01
dc.identifier.issn 0003-682X
dc.identifier.uri http://hdl.handle.net/10251/68752
dc.description.abstract Most of the analytical models devoted to determine the acoustic properties of a rigid perforated panel consider the acoustic impedance of a single hole and then use the porosity to determine the impedance for the whole panel. However, in the case of not homogeneous hole distribution or more complex configurations this approach is no longer valid. This work explores some of these limitations and proposes a finite element methodology that implements the linearized Navier Stokes equations in the frequency domain to analyse the acoustic performance under normal incidence of perforated panel absorbers. Some preliminary results for a homogenous perforated panel show that the sound absorption coefficient derived from the Maa analytical model does not match those from the simulations. These differences are mainly attributed to the finite geometry effect and to the spatial distribution of the perforations for the numerical case. In order to confirm these statements, the acoustic field in the vicinities of the perforations is analysed for a more complex configuration of perforated panel. Additionally, experimental studies are carried out in an impedance tube for the same configuration and then compared to previous methods. The proposed methodology is shown to be in better agreement with the laboratorial measurements than the analytical approach. (C) 2014 Elsevier Ltd. All rights reserved. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Applied Acoustics es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Perforated panels es_ES
dc.subject Sound absorption es_ES
dc.subject Navier-Stokes equations es_ES
dc.subject FEM es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.title A finite element model of perforated panel absorbers including viscothermal effects es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.apacoust.2014.10.013
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Física Aplicada - Departament de Física Aplicada es_ES
dc.contributor.affiliation Universitat Politècnica de València. Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica - Centre de Tecnologies Físiques: Acústica, Materials i Astrofísica es_ES
dc.description.bibliographicCitation Carbajo San Martín, J.; Ramis Soriano, J.; Godinho, L.; Amado-Mendes, P.; Alba Fernández, J. (2015). A finite element model of perforated panel absorbers including viscothermal effects. Applied Acoustics. 90:1-8. doi:10.1016/j.apacoust.2014.10.013 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.apacoust.2014.10.013 es_ES
dc.description.upvformatpinicio 1 es_ES
dc.description.upvformatpfin 8 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 90 es_ES
dc.relation.senia 298356 es_ES
dc.identifier.eissn 1872-910X


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