Sensitivity analysis for acoustic waves propagating through homogenized thin perforated layer

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/49777513:23640/10:00503931

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Sensitivity analysis for acoustic waves propagating through homogenized thin perforated layer

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Sensitivity analysis for acoustic waves propagating through homogenized thin perforated layer

Popis výsledku anglicky

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.

Druh

O - Ostatní výsledky

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

<a href="/cs/project/GA101%2F07%2F1471" target="_blank" >GA101/07/1471: Modelování šíření vln v tělesech a heterogenních prostředí s uvažováním lineárních, nelinárních a víceškálových jevů metodou konečných prvků</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů