锥-柱组合壳体声辐射影响因素研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (22) : 167-171.

论文

锥-柱组合壳体声辐射影响因素研究

魏应三1, 王永生1

作者信息 +

Study of the Effect Factors on Acoustical Characteristics of Coupled Cylindrical-conical Shell

WEI Ying-san 1, WANG Yong-sheng1

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文章历史 +

摘要

在原有的简单锥-柱壳体的基础上，以肋骨、舱壁加强的锥-柱组合壳体来模拟潜艇典型尾部结构，采用有限元(FEM)和快速多极边界元(FM-BEM)方法，研究了壳体的舱壁布置形式、激振力方向、流体介质、锥壳段刚度、壳体阻尼对其声学性能的影响。在验证了原模型的干模态基础上，分别计算了各因素对新模型辐射声功率的影响，结果表明：（1）分布轴向力作用下，采用球舱壁加强的组合壳体水下辐射声功率及效率最小；（2）由于径向力更易激起壳体的周向模态，其激起的水声要强于轴向力，但轴向力的作用也不可忽视；（3）施加径向力时，壳体在水中的轴向位移小于在空气中，而法向位移大于在空气中；（4）锥壳段刚度对降噪无明显作用，而适当增加壳体阻尼可降低声辐射。本文的研究结论可为潜艇尾部声学优化设计提供参考。

Abstract

Coupled cylindrical-conical Shells, submarine, sound radiation, effect factors.
Based on the simple coupled cylindrical-conical shell, a new modal stiffened by ribs and bulkhead was used to simulate the typical submarine afterbody. Adopting FEM and FM-BEM, the effects of bulkhead configuration, excitation direction, fluid effects, the conical shell stiffness and hull damp factors on the shell acoustic radiation were researched. First the dry modes of the initial shell were verified, and then the sound power of the new modal under each case was calculated. Results show that: (1) under distributed axial excitation, the spherical bulkhead stiffened shell radiates minimum sound power and radiation efficiency; (2) as the radial force can easily excites circumferential modes of the shell, so it excited stronger sound than axial force, but the effect of axial force cannot be neglected; (3) under radial excitation, smaller axial displacement and stronger radial displacement of the shell in water were discovered than that of in air; (4) the conical shell stiffness has minor effect on the sound suppression, while the damp can well suppress the sound radiation. The obtained conclusion can afford some suggestions to the optimum acoustic design of the sub-marine afterbody.

导出引用

魏应三; 王永生. 锥-柱组合壳体声辐射影响因素研究[J]. 振动与冲击, 2012, 31(22): 167-171

WEI Ying-san;WANG Yong-sheng. Study of the Effect Factors on Acoustical Characteristics of Coupled Cylindrical-conical Shell[J]. Journal of Vibration and Shock, 2012, 31(22): 167-171