Development of a 3D finite element acoustic model to predict the sound reduction index of stud based double-leaf walls

Hdl Handle:
http://hdl.handle.net/10545/621445
Title:
Development of a 3D finite element acoustic model to predict the sound reduction index of stud based double-leaf walls
Authors:
Nguyen, Van Bac; Arjunan, Arun; Wang, Chang; Mynors, Diane; Morgan, Tertia; English, Martin
Abstract:
Building standards incorporating quantitative acoustical criteria to ensure adequate sound insulation are now being implemented. Engineers are making great efforts to design acoustically efficient double-wall structures. Accordingly, efficient simulation models to predict the acoustic insulation of double-leaf wall structures are needed. This paper presents the development of a numerical tool that can predict the frequency dependent sound reduction index R of stud based double-leaf walls at one-third-octave band frequency range. A fully vibro-acoustic 3D model consisting of two rooms partitioned using a double-leaf wall, considering the structure and acoustic fluid coupling incorporating the existing fluid and structural solvers are presented. The validity of the finite element (FE) model is assessed by comparison with experimental test results carried out in a certified laboratory. Accurate representation of the structural damping matrix to effectively predict the R values are studied. The possibilities of minimising the simulation time using a frequency dependent mesh model was also investigated. The FEA model presented in this work is capable of predicting the weighted sound reduction index Rw along with A-weighted pink noise C and A-weighted urban noise Ctr within an error of 1 dB. The model developed can also be used to analyse the acoustically induced frequency dependent geometrical behaviour of the double-leaf wall components to optimise them for best acoustic performance. The FE modelling procedure reported in this paper can be extended to other building components undergoing fluid–structure interaction (FSI) to evaluate their acoustic insulation.
Affiliation:
University of Wolverhampton; Hadley Industries plc; University of Sussex
Citation:
Nguyen, Van Bac et al. (2014) 'Development of a 3D finite element acoustic model to predict the sound reduction index of stud based double-leaf walls', Journal of Sound and Vibration, 333(23) pp. 6140–6155.
Publisher:
Elsevier
Journal:
Journal of Sound and Vibration
Issue Date:
Nov-2014
URI:
http://hdl.handle.net/10545/621445
DOI:
10.1016/j.jsv.2014.06.032
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0022460X14005380
Type:
Article
Language:
en
ISSN:
0022460X
Sponsors:
N/A
Appears in Collections:
Department of Mechanical Engineering & the Built Environment

Full metadata record

DC FieldValue Language
dc.contributor.authorNguyen, Van Bacen
dc.contributor.authorArjunan, Arunen
dc.contributor.authorWang, Changen
dc.contributor.authorMynors, Dianeen
dc.contributor.authorMorgan, Tertiaen
dc.contributor.authorEnglish, Martinen
dc.date.accessioned2017-02-21T15:12:20Z-
dc.date.available2017-02-21T15:12:20Z-
dc.date.issued2014-11-
dc.identifier.citationNguyen, Van Bac et al. (2014) 'Development of a 3D finite element acoustic model to predict the sound reduction index of stud based double-leaf walls', Journal of Sound and Vibration, 333(23) pp. 6140–6155.en
dc.identifier.issn0022460X-
dc.identifier.doi10.1016/j.jsv.2014.06.032-
dc.identifier.urihttp://hdl.handle.net/10545/621445-
dc.description.abstractBuilding standards incorporating quantitative acoustical criteria to ensure adequate sound insulation are now being implemented. Engineers are making great efforts to design acoustically efficient double-wall structures. Accordingly, efficient simulation models to predict the acoustic insulation of double-leaf wall structures are needed. This paper presents the development of a numerical tool that can predict the frequency dependent sound reduction index R of stud based double-leaf walls at one-third-octave band frequency range. A fully vibro-acoustic 3D model consisting of two rooms partitioned using a double-leaf wall, considering the structure and acoustic fluid coupling incorporating the existing fluid and structural solvers are presented. The validity of the finite element (FE) model is assessed by comparison with experimental test results carried out in a certified laboratory. Accurate representation of the structural damping matrix to effectively predict the R values are studied. The possibilities of minimising the simulation time using a frequency dependent mesh model was also investigated. The FEA model presented in this work is capable of predicting the weighted sound reduction index Rw along with A-weighted pink noise C and A-weighted urban noise Ctr within an error of 1 dB. The model developed can also be used to analyse the acoustically induced frequency dependent geometrical behaviour of the double-leaf wall components to optimise them for best acoustic performance. The FE modelling procedure reported in this paper can be extended to other building components undergoing fluid–structure interaction (FSI) to evaluate their acoustic insulation.en
dc.description.sponsorshipN/Aen
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0022460X14005380en
dc.subjectAcousticsen
dc.subjectSound reduction indexen
dc.subjectPartition wallen
dc.subjectFinite Element analysisen
dc.titleDevelopment of a 3D finite element acoustic model to predict the sound reduction index of stud based double-leaf wallsen
dc.typeArticleen
dc.contributor.departmentUniversity of Wolverhamptonen
dc.contributor.departmentHadley Industries plcen
dc.contributor.departmentUniversity of Sussexen
dc.identifier.journalJournal of Sound and Vibrationen
All Items in UDORA are protected by copyright, with all rights reserved, unless otherwise indicated.