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. The problem of the dynamic response of a structural-acoustic system in the midfrequency range is hereby considered. The system is initially modelled using finite elements, and is subsequently reduced using the Second Order Arnoldi Reduction method (SOAR) resulting in radical reduction of calculation times. The fully coupled system is modelled using a Statistical Energy Analysis like (SEA-like) approach, and the energetic characteristics for each subsystem are computed and compared to the direct FEM solution. The error with respect to the full FE solution is presented and the limits of the reliability of the reduction are explored. The loading applied to the model comprises typical random aeroacoustic excitations, such as a diffused sound field and a Turbulent Boundary Layer (TBL) excitation.

EFFICIENT CALCULATION OF THE RESPONSE OF A STRUCTURAL ACOUSTIC SYSTEM UNDER AERODYNAMIC EXCITATIONS