On the Use of Inter Modal Radiation Impedances in Plate-Ground Coupling - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Acta Acustica united with Acustica Année : 2016

On the Use of Inter Modal Radiation Impedances in Plate-Ground Coupling

Résumé

A new kind of inter modal impedance has recently been developed taking into account plate-ground interaction. This impedance is called the ground inter modal impedance. The inter modal impedance allows to understand the transfer of energy from a structure to the surrounding medium. The aim of this paper is to compare two types of inter modal impedance in different cases of plate/medium coupling on the top surface. The two types of impedance are acoustical inter modal impedance and the recently developed ground inter modal impedance. An extension of the usual coupling case with fluid will be introduced for a finite simply supported plate coupled with a semi-infinite ground medium. Inter modal impedance can be used to adapt the interpretation made in the acoustical case for the ground case, and to exhibit differences between acoustical and ground media. The paper points out major differences at the origin of the flat plate velocity response when coupled with a ground medium, principally due to the excitation of the shear wave in the ground medium which do not exist in the acoustic medium. The influence of the plate surface on the RMS plate velocity is presented as well as the influence of the ground stratification
Fichier non déposé

Dates et versions

hal-01282588 , version 1 (03-03-2016)

Identifiants

Citer

Loïc Grau, Bernard Laulagnet. On the Use of Inter Modal Radiation Impedances in Plate-Ground Coupling. Acta Acustica united with Acustica, 2016, 102 (2), pp.347-360. ⟨10.3813/AAA.918951⟩. ⟨hal-01282588⟩
62 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More