Vibro-acoustic behaviour of low- to high-density anisotropic cellular foams

Mao, Huina (författare): KTH,Marcus Wallenberg Laboratoriet MWL,VinnExcellence Center for ECO2 Vehicle design

Gaborit, Mathieu (författare): KTH,Marcus Wallenberg Laboratoriet MWL,VinnExcellence Center for ECO2 Vehicle design,Laboratoire d’Acoustique de l’Université du Mans (LAUM), UMR 6613, Institut d’Acoustique - Graduate School (IA-GS), CNRS, Le Mans Université, France

Rumpler, Romain, 1983- (författare): KTH,Marcus Wallenberg Laboratoriet MWL,VinnExcellence Center for ECO2 Vehicle design

Göransson, Peter, 1959- (författare): KTH,Marcus Wallenberg Laboratoriet MWL,VinnExcellence Center for ECO2 Vehicle design

(creator_code:org_t)

KATHOLIEKE UNIV LEUVEN, DEPT WERKTUIGKUNDE, 2020
2020
Engelska.
Ingår i: PROCEEDINGS OF INTERNATIONAL CONFERENCE ON NOISE AND VIBRATION ENGINEERING (ISMA2020) / INTERNATIONAL CONFERENCE ON UNCERTAINTY IN STRUCTURAL DYNAMICS (USD2020). - : KATHOLIEKE UNIV LEUVEN, DEPT WERKTUIGKUNDE. ; , s. 451-461

Abstract Ämnesord

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The paper discusses the vibro-acoustic behaviour of a recently proposed novel anisotropic cellular foam geometry derived from the basic symmetric Kelvin cell geometry. The associated equivalent elastic material properties are estimated based on a recently developed inversion method, in terms of the 21 elastic constants of the Hooke's tensor. The dynamic behaviour of the cellular material configuration and its homogeneous model by applying the equivalent material properties are studied under arbitrary excitation. The correlation between the vibro-acoustic behaviour, foam density, and material anisotropy is studied based on finite element simulations. High correlations of eigenfrequency and eigenmode shapes between the target cellular foam model and the equivalent solid model are found. A set of empirical relations are proposed, linking the micro-structure in low to high relative density for the anisotropic cellular geometries investigated. Potential applications in vibro-acoustic of the proposed anisotropic foam are discussed

Av författaren/redakt...: Mao, Huina; Gaborit, Mathieu; Rumpler, Romain, ...; Göransson, Peter ...

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