Acoustic Radiation Using FEM and BEM

In this paper, the acoustic pressure distribution on the surface of a threedimensional structure and the total acoustic power radiated by the structure resulting from a known surface velocity distribution has been obtained by FEM and BEM. The pressure distribution is computed by Helmholtz Boundary Integral Equation. The sound radiation power of structure can be expressed as a positive definite quadratic form of the Hermitian by impedance matrix. Finally, taking two problems as simulation examples, the analytical results and experimental results show the validity and accuracy of the presented method for calculating the acoustic radiation.