Abstract

In this paper, a fully coupled vibro-acoustic finite element model (FEM) is developed to characterize the structural and acoustic coupling of a flexible thin shell by a cylinder-like cavity. The combined integral-modal approach is used to handle the acoustic pressure inside the cavity. Based on the modal proposed, the impact excitation effect on the vibro-acoustic behavior of the coupled system is investigated using the modal radiation efficiency at particular frequencies. Simulations are conduced to examine the effect on acoustic natural frequencies, acoustic pressure and structural responses using ANSYS and SYSNOISE software.

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