Wave Superposition Method Applied To Calculate the Radiation Sound Power of a Stiffened Plate

Abstract

Abstract An indirect boundary element method using discrete sound field of virtual sound source is used to calculate the acoustic and vibration coupling response of the stiffened plate in water. In this paper, the relationship between the structural vibration mode coefficient and the virtual sound source intensity is established by using the superposition principle through Fourier transform using structural dynamics equations and boundary compatibility condition satisfying the function of virtual sound source intensity. Once the virtual sound source intensity is obtained, the radiation power can be determined. Taking the simply supported rectangular thin plate as an example, the sound radiation power is calculated on the condition that surface velocity is unknown, and the results are compared with the results of the analytical method, which shows that the method has high accuracy.