Homogenization of the acoustic transmission through perforated layer

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F10%3A00503312" target="_blank" >RIV/49777513:23520/10:00503312 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Homogenization of the acoustic transmission through perforated layer
Original language description
The paper deals with homogenized transmission conditions imposed on the interface plane separating two halfspaces occupied by the acoustic medium. The conditions are obtained as the two-scale homogenization limit of the standard acoustic problem imposedin the layer perforated by a sieve-like obstacle with periodic structure. Both the characteristic scale of the perforations and the layer thickness are described by a small parameter. The limit model involving some homogenized coefficients governs the interface discontinuity of the acoustic pressure associated with the two halfspaces and the magnitude of the transverse acoustic velocity. This novel approach allows for treatment of complicated designs of perforations and presents an alternative to the usual description of the acoustic impedance, which relies on a rough averaging the quasi-experimental data.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BI - Acoustics and oscillation
OECD FORD branch
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Project
<a href="/en/project/GA101%2F07%2F1471" target="_blank" >GA101/07/1471: Finite element modelling of linear, non-linear and multiscale effects in wave propagation in solids and heterogeneous media</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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