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Engineering and Systems   > Home   > Uncertainties and Reliability of Multiphysical Systems   > Optimization and Reliability   > Article

Numerical simulation of vibroacoustic problems by the modal synthesis

Simulation numérique d’un problème vibroacoustique par synthèse modale


Abdelkhalak El Hami
INSA Rouen

Bouchaïb Radi
LIMII FST
Settat - Maroc



Published on 21 February 2017   DOI : 10.21494/ISTE.OP.2017.0124

Abstract

Résumé

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In the vibroacoustic studies of coupled fluid-structure systems, reducing the size of the problem is important because we must add all the degrees of freedom of the fluid domain to those of the structure. We propose a modal synthesis method for solving this type of problem, coupling dynamic substructure of Craig and Bampton type and acoustic subdomain based on a pressure formulation. The application of the proposed method is performed on a boat propeller with four blades, in air and water. Our numerical results are confronted to some experimental study which allows validate jointly the calculation process and the proposed method.

In the vibroacoustic studies of coupled fluid-structure systems, reducing the size of the problem is important because we must add all the degrees of freedom of the fluid domain to those of the structure. We propose a modal synthesis method for solving this type of problem, coupling dynamic substructure of Craig and Bampton type and acoustic subdomain based on a pressure formulation. The application of the proposed method is performed on a boat propeller with four blades, in air and water. Our numerical results are confronted to some experimental study which allows validate jointly the calculation process and the proposed method.

Fluid-structure interaction reduction of model vibroacoustic modal synthesis

Fluid-structure interaction reduction of model vibroacoustic modal synthesis