The Interior Acoustic-Structure Coupled Problem

Abstract

The goal of this effort is to solve the acoustic-structural coupling problem. To account for the inner acoustic cavity in the structural response, an expression for the acoustic pressure produced by the motion of the external structure is derived in this effort. To this end, the acoustic mode shapes and natural frequencies of the inner cavity are computed. The eigenproperties are then used to solve for the Green’s functions, which allows to compute the acoustic pressure due to the structural motion. The modeling of the acoustic cavity is included in the structural. The structural model is evaluated numerically and validated by comparison to experimental results from the open literature. It is shown in this work that the acoustic cavity dynamics effect results in a sharp increase of the response around the shell cavity resonance.