Sensitivity analysis for acoustic waves propagating through homogenized thin perforated layer

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F10%3A00503931" target="_blank" >RIV/49777513:23520/10:00503931 - isvavai.cz</a>
Alternative codes found
RIV/49777513:23640/10:00503931
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Sensitivity analysis for acoustic waves propagating through homogenized thin perforated layer
Original language description
We consider the acoustic transmission through thin perforated plane separating two halfspaces occupied by the acoustic medium. On this interface the homogenized transmission conditions are imposed; these were obtained recently as the two-scale homogenization limit of the standard acoustic problem imposed in the layer with an immersed sieve-like obstacle designed as a periodic structure. For such a two-scale model of the acoustic transmission we develop the sensitivity of the homogenized parameters withrespect to the perforation design. Then we consider the acoustic waves propagating in a duct which is equipped with the perforated interface. Using the adjoined variable technique the sensitivity of the general objective function involving the global acoustic pressure eld w.r.t. the acoustic transmission parameters is computed. We demonstrate using 2D and 3D examples, how the perforation geometry inuences the acoustic transmission.
Czech name
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Czech description
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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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