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

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    Authors
    Arjunan, Arun cc
    Wang, C.J.
    Yahiaoui, K.
    Mynors, D.J.
    Morgan, T.
    Nguyen, V.B.
    English, M.
    Issue Date
    2014-07-26
    
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    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
    Arjunan, A. Wang, C. J., Yahiaoui, K., Mynors, D. J. 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. doi: 10.1016/j.jsv.2014.06.032
    Publisher
    Elsevier
    Journal
    Journal of Sound and Vibration
    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
    Journal article
    Language
    en
    ISSN
    0022460X
    Sponsors
    University of Wolverhampton
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jsv.2014.06.032
    Scopus Count
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    Faculty of Science and Engineering

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