Modal analysis of fluid-structure systems: reduced models accuracy and experimental validation

It is proposed to investigate appropriate reduced formulations for modal analysis of a coupled system constituted by a structure containing an inviscid liquid. Experimental results on a simple structure will validate an analytical method. This method will then be used as a reference for results obtained with reduced models. We will show that the utilization, in addition to the usual acoustic modes in rigid motionless cavity, of a static potential displacement, accelerate the convergence of the method which is usually poor for slightly compressible fluid such as a liquid.