000022321 001__ 22321
000022321 005__ 20170622150007.0
000022321 04107 $$aeng
000022321 046__ $$k2015-05-25
000022321 100__ $$aCastro, Francisco José Brito
000022321 24500 $$aDISPERSION ANALYSIS OF ACOUSTIC WAVES IN FLUID MEDIA DISCRETIZED BY ENERGY-ORTHOGONAL FINITE ELEMENTS

000022321 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022321 260__ $$bNational Technical University of Athens, 2015
000022321 506__ $$arestricted
000022321 520__ $$2eng$$aThis paper studies the dispersion of acoustic waves in fluid media discretized by the finite element method. The element stiffness matrix is split into basic and higher order components which are respectively related to the mean and deviatoric components of the gradient of acoustic pressure. This decomposition is applied to the kinetic energy. The dispersion analysis yields a correlation between the higher order kinetic energy and the kinetic energy error. The use of this correlation as a reference to apply the higher order energy as an error indicator for the acoustic cavity modes computed by the finite element method is explored.

000022321 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022321 653__ $$aenergy-orthogonal stiffness, numerical dispersion, acoustic waves.

000022321 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022321 720__ $$aCastro, Francisco José Brito
000022321 8560_ $$ffischerc@itam.cas.cz
000022321 8564_ $$s711186$$uhttps://invenio.itam.cas.cz/record/22321/files/C461.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022321 962__ $$r22030
000022321 980__ $$aPAPER