Homogenization of transmission conditions for analysis of acoustic waves in domains with perforated barriers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F09%3A00501727" target="_blank" >RIV/49777513:23520/09:00501727 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Homogenization of transmission conditions for analysis of acoustic waves in domains with perforated barriers

Popis výsledku v původním jazyce

We consider structures like the mufer of the engine exhaust, where the acoustic waves propagate through periodically perforated barriers. Recently we proposed a homogenized model of the acoustic transmission through the layer with embedded rigid obstacles of arbitrary shapes, which represent the perforation. The homogenized model describes relationship between jump of the acoustic pressures at the discontinuity interface and the transverse acoustic velocity, on introducing an in-layer acoustic pressurewhich describes wave propagation along the interface. The coupling between the transversely and the tangential acoustic velocities may become important for certain types of perforations. A sensitivity study was done which reveals remarkable dependence ofwave transmission losses on the geometry of the perforation. Examples of 3D perforation geometries were treated.

Název v anglickém jazyce

Homogenization of transmission conditions for analysis of acoustic waves in domains with perforated barriers

Popis výsledku anglicky

We consider structures like the mufer of the engine exhaust, where the acoustic waves propagate through periodically perforated barriers. Recently we proposed a homogenized model of the acoustic transmission through the layer with embedded rigid obstacles of arbitrary shapes, which represent the perforation. The homogenized model describes relationship between jump of the acoustic pressures at the discontinuity interface and the transverse acoustic velocity, on introducing an in-layer acoustic pressurewhich describes wave propagation along the interface. The coupling between the transversely and the tangential acoustic velocities may become important for certain types of perforations. A sensitivity study was done which reveals remarkable dependence ofwave transmission losses on the geometry of the perforation. Examples of 3D perforation geometries were treated.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BI - Akustika a kmity

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název periodika

PAMM - Proceedings in Applied Mathematics and Mechanics

ISSN

1617-7061

e-ISSN

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Svazek periodika

8

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

2

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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