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

2.50
Hdl Handle:
http://hdl.handle.net/2436/620911
Title:
Development of a 3D finite element acoustic model to predict the sound reduction index of stud based double-leaf walls
Authors:
Arjunan, A.; Wang, C.J.; Yahiaoui, K.; Mynors, D.J.; Morgan, T.; Nguyen, V.B.; English, M.
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.
Citation:
Development of a 3D finite element acoustic model to predict the sound reduction index of stud based double-leaf walls 2014, 333 (23):6140 Journal of Sound and Vibration
Publisher:
Elsevier
Journal:
Journal of Sound and Vibration
Issue Date:
Nov-2014
URI:
http://hdl.handle.net/2436/620911
DOI:
10.1016/j.jsv.2014.06.032
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0022460X14005380
Type:
Article
Language:
en
ISSN:
0022460X
Sponsors:
University of Wolverhampton
Appears in Collections:
Engineering and Technology

Full metadata record

DC FieldValue Language
dc.contributor.authorArjunan, A.en
dc.contributor.authorWang, C.J.en
dc.contributor.authorYahiaoui, K.en
dc.contributor.authorMynors, D.J.en
dc.contributor.authorMorgan, T.en
dc.contributor.authorNguyen, V.B.en
dc.contributor.authorEnglish, M.en
dc.date.accessioned2017-11-28T15:43:46Z-
dc.date.available2017-11-28T15:43:46Z-
dc.date.issued2014-11-
dc.identifier.citationDevelopment of a 3D finite element acoustic model to predict the sound reduction index of stud based double-leaf walls 2014, 333 (23):6140 Journal of Sound and Vibrationen
dc.identifier.issn0022460X-
dc.identifier.doi10.1016/j.jsv.2014.06.032-
dc.identifier.urihttp://hdl.handle.net/2436/620911-
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.sponsorshipUniversity of Wolverhamptonen
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0022460X14005380en
dc.rightsArchived with thanks to Journal of Sound and Vibrationen
dc.subjectFEAen
dc.subjectAcousticen
dc.subjectdouble-leaf wallen
dc.subjectsound transmission lossen
dc.subjectfluid structure interactionen
dc.subjectexperimental testen
dc.subjectfinite element methoden
dc.subjectbuildingen
dc.titleDevelopment of a 3D finite element acoustic model to predict the sound reduction index of stud based double-leaf wallsen
dc.typeArticleen
dc.identifier.journalJournal of Sound and Vibrationen
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