For the prediction problem of static acoustic scattering characteristics of propellers, a planar element method combining the layered medium acoustic propagation theory and the discrete surface element thickness information is used to establish a prediction method for the acoustic scattering characteristics of thin plate targets with variable thickness surfaces. The basic idea is to solve the reflection coefficients of all surface elements based on the thickness of surface elements and material property information, and then obtain the total scattered acoustic field of the target. Considering the computational efficiency, the scattered sound field of a complete propeller is predicted by means of mesh topology clone from a single propeller blade. The results show that the predicted values of the frequency response characteristics, angle-distance spectrum and spatial directivity of propeller target strength are in general agreement with the experimental results. This study may be useful for the prediction of acoustic scattering characteristics near the stern of underwater vehicles.
关键词
螺旋桨/板块元方法/声散射特性/目标强度
Key words
propeller/planar element method/acoustic scattering characteristic/target strength
维普
万方数据