偶极子源与力激励作用下截顶锥形壳振动与声辐射研究

螺旋桨噪声是舰船辐射噪声的主要组成部分,采用有限长截顶锥形壳模拟潜艇艉部,根据螺旋桨噪声产生机理,对比分析了集中力激励与偶极子源激励下锥形壳产生的辐射噪声,并讨论了激励作用位置对壳体振动与辐射噪声的影响。结论显示力激励作用引起的壳体的振动与声辐射要大于偶极子源作用下的情况;当激励施加在锥形壳体截面的中心位置时,壳体在低频时的振动与声辐射要小于激励施加在截面非对称位置处的情况。

Sound and Vibration of a Truncated Conical Shell under Excitation of Dipole Source and Force

The noise generated by the propeller is the major contribution to the total noise of naval vessel.This paper uses a finite truncated conical shell to simulate the stern of submarine and analyzes the sound and vibration of a truncated conical shell under excitation of dipole source and force,Moreover,a discussion on the position of excitation is presented.The acquired conclusions show that the sound and vibration caused by the exciting force are larger than those by the dipole source.When the dipole source i...