Distributed source energy boundary point method for solving high-frequency acoustic radiation

摘要

According to the restriction to the mesh size that FEM and BEM needs, the high frequency acoustic radiation analysis is hardly available; the statistical energy analysis method (SEA) can be used to calculate the multi-system structure high frequency acoustic radiation, but it can not be able to calculate the single structure object or the external radiation acoustic field. A new distributed source energy boundary point method (DSEBPM) is proposed here for solving the high frequency exterior (interior) acoustic radiation, the transfer matrices of acoustic energy and the sound intensity are acquired by the particular matrices constructed by the virtual energy sources in (out) the structure, and the acoustic energy and intensity in the acoustic field can easily be calculated. The DSEBPM can not only avoid the mesh grid in FEM and BEM, but also cover the shortage of SEA for solving high frequency acoustic radiation. The validity and effectiveness are verified by the numerical simulation of a pulsating sphere and a vibrating box.