000013080 001__ 13080
000013080 005__ 20161114160326.0
000013080 04107 $$aeng
000013080 046__ $$k2009-06-22
000013080 100__ $$aBesset, S.
000013080 24500 $$aA simplified energy method for acoustic sources identification

000013080 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013080 260__ $$bNational Technical University of Athens, 2009
000013080 506__ $$arestricted
000013080 520__ $$2eng$$aThis paper deals with the behavior of acoustic cavities in the mid-high frequency range. An energy method called Simplified Energy Method (MES) has already been proposed to predict energy level in acoustic cavities. MES can also be applied to structures to determine energy densities. This paper proposes to use this energy method to solve inverse problems (structural and acoustics). Internal and boundary acoustic sources are detected thanks to the inverse formulation of the method (IMES). An example concerning a 3D acoustic cavity is proposed. The issue of determining the right input power is then discussed. MES is based on the superposition of direct and reverberated fields, and the lack of accuracy of the method comes from the bad evaluation of the directivity of the direct field. A mixed BEM / Energy method is proposed to improve the calculation of the direct field. This approach is called HMES (Hybrid Simplified Energy Method).

000013080 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013080 653__ $$aEnergy method, source identification, BEM Abstract. This paper deals with the behavior of acoustic cavities in the mid-high frequency range. An energy method called Simplified Energy Method (MES) has already been proposed to predict energy level in acoustic cavities. MES can also be applied to structures to determine energy densities. This paper proposes to use this energy method to solve inverse problems (structural and acoustics). Internal and boundary acoustic sources are detected thanks to the inverse formulation of the method (IMES). An example concerning a 3D acoustic cavity is proposed. The issue of determining the right input power is then discussed. MES is based on the superposition of direct and reverberated fields, and the lack of accuracy of the method comes from the bad evaluation of the directivity of the direct field. A mixed BEM / Energy method is proposed to improve the calculation of the direct field. This approach is called HMES (Hybrid Simplified Energy Method).

000013080 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013080 720__ $$aBesset, S.$$iIchchou, M.$$iChabchoub, M.$$iJezequel, L.
000013080 8560_ $$ffischerc@itam.cas.cz
000013080 8564_ $$s479392$$uhttps://invenio.itam.cas.cz/record/13080/files/CD106.pdf$$yOriginal version of the author's contribution as presented on CD, section: Identification methods in structural dynamics - iii - (MS).
000013080 962__ $$r13074
000013080 980__ $$aPAPER