000009223 001__ 9223
000009223 005__ 20141204092419.0
000009223 04107 $$aeng
000009223 046__ $$k12/05/2014
000009223 100__ $$aLukeš, V.
000009223 24500 $$aComputational homogenization of acoustic problem in perforated plates

000009223 24630 $$n18.$$pEngineering Mechanics 2012
000009223 260__ $$bInstitute of Theoretical and Applied Mechanics, AS CR, Prague
000009223 506__ $$arestricted
000009223 520__ $$2eng$$aWe consider acoustic wave propagation described by Helmholtz equation and involving homogenized transmission conditions imposed along a thin perforated interface separating two halfspaces occupied by the acoustic medium. The homogenized transmission conditions are imposed on this perforated interface. The transmission conditions were obtained as the two-scale homogenization limit of the standard acoustic problem imposed in the layer perforated by a sieve-like obstacle with periodic structure. By using the sensitivity analysis we can solve the problem of an optimal design of the perforation to minimize the transmission loss in a domain embedding the interface. The perforated periodic structure is represented by a reference computational cell, whereby its geometry is controlled by the spline functions.

000009223 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009223 653__ $$alinear acoustics, homogenization, sensitivity analysis, transmission condition

000009223 7112_ $$aEngineering Mechanics 2012$$cSvratka (CZ)$$d12/05/2014 - 15/05/2014$$gEM2012
000009223 720__ $$aLukeš, V.$$iRohan, E.
000009223 8560_ $$ffischerc@itam.cas.cz
000009223 8564_ $$s362794$$uhttps://invenio.itam.cas.cz/record/9223/files/179_Lukes_V-FT.pdf$$yOriginal version of the author's contribution as presented on CD, paper (No. 179).
000009223 962__ $$r8924
000009223 980__ $$aPAPER