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IMPEDANCE PREDICTION FOR SEVERAL POROUS LAYERS ON A MOVING PLATE: APPLICATION TO A PLATE COUPLED TO AN AIR CAVITY

X. SAGARTZAZU

Ikerlan Technological Research Center; Po J. M. Arizmendiarreta, 20500 Arrasate-Mondragón, Gipuzkoa, Spain

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and

L. HERVELLA-NIETO

Departamento de Matemáticas, Universidade da Coruña, 15071, A Coruña, Spain

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https://doi.org/10.1142/S0218396X11004468Cited by:5 (Source: Crossref)

Abstract

This paper presents the problem of modeling poroelastic material on a moving structure. It presents the ambiguity of using estimated or measured surface impedance on a rigid structure as opposed to transfer impedance, which takes into account the movement of the structure to which a porous material is fixed. Biot's model for prediction of surface impedance is presented, and the transfer impedance is defined on the basis of this model. A case where several layers of porous material are fixed to a moving wall is also studied. Finally, it presents the level of agreement with experimental measurements in a coupled fluid–structure problem when an impedance considering a fixed structure and an impedance considering a moving structure are used.

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