Vibro-acoustic analysis of fluid-loaded structures using component mode synthesis

The work focuses on efficient vibro-acoustic analysis of fluid-loaded structures in the low to medium frequency range. A coupled finite element and boundary element formulation is used to describe the interaction between the structures and the fluid. Three component modal sets are proposed, including in-vacuo structural modes describing the free vibration of the structures, interface modes capturing the prominent dynamics of the fluid-structure interfaces, and adjoint modes representing the acoustic loadings from the fluid. Component mode synthesis is applied to the coupled systems to accelerate the prediction of the vibro-acoustic responses. The performance of the method is illustrated on a water-loaded stiffened plate.