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Statements

Subject Item
n2:RIV%2F49777513%3A23520%2F09%3A00501727%21RIV10-MSM-23520___
rdf:type
n14:Vysledek skos:Concept
dcterms:description
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 pressure which 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 of wave transmission losses on the geometry of the perforation. Examples of 3D perforation geometries were treated. 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 pressure which 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 of wave transmission losses on the geometry of the perforation. Examples of 3D perforation geometries were treated.
dcterms:title
Homogenization of transmission conditions for analysis of acoustic waves in domains with perforated barriers Homogenization of transmission conditions for analysis of acoustic waves in domains with perforated barriers
skos:prefLabel
Homogenization of transmission conditions for analysis of acoustic waves in domains with perforated barriers Homogenization of transmission conditions for analysis of acoustic waves in domains with perforated barriers
skos:notation
RIV/49777513:23520/09:00501727!RIV10-MSM-23520___
n3:aktivita
n4:P
n3:aktivity
P(1M06031), P(GA101/07/1471)
n3:cisloPeriodika
1
n3:dodaniDat
n10:2010
n3:domaciTvurceVysledku
n6:1351958 n6:5644828
n3:druhVysledku
n18:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n5:predkladatel
n3:idSjednocenehoVysledku
317730
n3:idVysledku
RIV/49777513:23520/09:00501727
n3:jazykVysledku
n11:eng
n3:klicovaSlova
acoustic transmission; homogenization; perforated interface
n3:klicoveSlovo
n8:perforated%20interface n8:homogenization n8:acoustic%20transmission
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[14270BCA2642]
n3:nazevZdroje
PAMM - Proceedings in Applied Mathematics and Mechanics
n3:obor
n16:BI
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
2
n3:projekt
n13:GA101%2F07%2F1471 n13:1M06031
n3:rokUplatneniVysledku
n10:2009
n3:svazekPeriodika
8
n3:tvurceVysledku
Rohan, Eduard Lukeš, Vladimír
s:issn
1617-7061
s:numberOfPages
2
n17:organizacniJednotka
23520