Reduced symmetric models for modal analysis of internal structural-acoustic and hydroelastic-sloshing systems

Abstract

It is proposed to investigate several variational formulations for modal analysis of bounded fluid-structure systems, taking into account in particular compressibility effects in the fluid for internal vibroacoustic problems, either gravity effects, in the context of an incompressible fluid, for hydroelastic-sloshing interaction problems. Appropriate reduced symmetric matrix models are constructed using zero-frequency static solutions of the fluid. In this respect, attention is paid to the behaviour of the fluid-structure equations with regard to their validity for zero-frequency static limit. © 2001 Elsevier Science B.V. All rights reserved.