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Predictions and measurements of sound transmission througha periodic array of elastic shells in air

Krynkin, Anton; Umnova, Olga; Chong, Alvin Yung Boon; Taherzadeh, Shahram and Attenborough, Keith (2010). Predictions and measurements of sound transmission througha periodic array of elastic shells in air. Journal of the Acoustical Society of America, 128(6) pp. 3496–3506.

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Analytical and numerical approaches have been made to the problems of (a) propagation through a doubly periodic array of elastic shells in air, (b) scattering by a single elastic shell in air, and (c) scattering by a finite periodic array of elastic shells in air. Using the Rayleigh identity and the Kirchhoff–Love approximations, a relationship is found between the elastic material parameters and the size of the bandgap below the first Bragg frequency, which results from the axisymmetric resonance of the shells in an array. Predictions and laboratory data confirm that use of a suitably “soft” non-vulcanized rubber results in substantial insertion loss peaks related to the resonances of the shells. Inclusion of viscoelasticity is found to improve the correspondence between predictions and data. In addition the possible influences of inhomogeneity due to the manufacturing of the elastic shells (i.e., the effects of gluing sheet edges together) and of departures from circular cylindrical cross-sections are considered by means of numerical methods.

Item Type: Journal Article
Copyright Holders: 2010 Acoustical Society of America
ISSN: 0001-4966
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetEPSRC (Engineering and Physical Sciences Research Council)
Academic Unit/Department: Mathematics, Computing and Technology > Engineering & Innovation
Item ID: 26819
Depositing User: Users 8259 not found.
Date Deposited: 20 Jan 2011 12:24
Last Modified: 25 Nov 2014 03:49
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