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A finite element approach for the acoustic modelling of perforated dissipative mufflers with non-homogeneous properties

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A finite element approach for the acoustic modelling of perforated dissipative mufflers with non-homogeneous properties

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dc.contributor.author Antebas, A. es_ES
dc.contributor.author Denia Guzmán, Francisco David es_ES
dc.contributor.author Pedrosa Sanchez, Ana Maria es_ES
dc.contributor.author Fuenmayor Fernández, Francisco Javier es_ES
dc.date.accessioned 2015-02-27T12:01:46Z
dc.date.available 2015-02-27T12:01:46Z
dc.date.issued 2013-04
dc.identifier.issn 0895-7177
dc.identifier.uri http://hdl.handle.net/10251/47565
dc.description.abstract [EN] In this work, a finite element approach is presented for modeling sound propagation in perforated dissipative mufflers with non-homogeneous properties. The spatial variations of the acoustic properties can arise, for example, from uneven filling processes during manufacture and degradation associated with the flow of soot particles within the absorbent material. First, the finite element method is applied to the wave equation for a propagation medium with variable properties (outer chamber with absorbent material) and a homogeneous medium (central passage). For the case of a dissipative muffler, the characterization of the absorbent material is carried out by means of its equivalent complex density and speed of sound. To account for the spatial variations of these properties, a coordinate-dependent function is proposed for the filling density of the absorbent material. The coupling between the outer chamber and the central passage is achieved by using the acoustic impedance of the perforated central pipe, that relates the acoustic pressure jump and the normal velocity through the perforations. The acoustic impedance of the perforated central duct includes the influence of the absorbent material and therefore a spatial variation of the impedance is also taken into account. A detailed study is then presented to assess the influence of the heterogeneous properties and the perforated duct porosity on the acoustic attenuation performance of the muffler. es_ES
dc.description.sponsorship The authors gratefully acknowledge the financial support of Ministerio de Ciencia e Innovacion and the European Regional Development Fund by means of the projects DPI2007-62635 and DPI2010-15412. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation MICINN/DPI2007-62635 es_ES
dc.relation MICINN/DPI2010-15412 es_ES
dc.relation.ispartof Mathematical and Computer Modelling es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Heterogeneous absorbent material es_ES
dc.subject Muffler es_ES
dc.subject Finite element approach es_ES
dc.subject Variable filling density es_ES
dc.subject.classification INGENIERIA MECANICA es_ES
dc.title A finite element approach for the acoustic modelling of perforated dissipative mufflers with non-homogeneous properties es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.mcm.2012.01.021
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Centro de Investigación en Tecnología de Vehículos - Centre d'Investigació en Tecnologia de Vehicles es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Mecánica y de Materiales - Departament d'Enginyeria Mecànica i de Materials es_ES
dc.description.bibliographicCitation Antebas, A.; Denia Guzmán, FD.; Pedrosa Sanchez, AM.; Fuenmayor Fernández, FJ. (2013). A finite element approach for the acoustic modelling of perforated dissipative mufflers with non-homogeneous properties. Mathematical and Computer Modelling. 57(7):1970-1978. https://doi.org/10.1016/j.mcm.2012.01.021 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.mcm.2012.01.021 es_ES
dc.description.upvformatpinicio 1970 es_ES
dc.description.upvformatpfin 1978 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 57 es_ES
dc.description.issue 7 es_ES
dc.relation.senia 207044
dc.contributor.funder Ministerio de Ciencia e Innovación


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