双层圆柱壳舷间声通道对壳体声振性能的影响

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (23) : 165-170.

论文

楼京俊1，屈铎2，唐宇航3，张振海1

作者信息 +

Effects of double-layer cylindrical shell side to side sound channel on whole shell’s vibro-acoustic performance

LOU Jingjun1,QU Duo2,TANG Yuhang3,ZHANG Zhenhai1

Author information +

文章历史 +

摘要

针对水下航行器壳体辐射噪声问题较大的现状，将其简化为加肋双层圆柱壳结构，采用AML自动匹配声学辐射边界条件技术，考虑内外壳体与舷间/舷外流体之间的耦合，建立了含有舷间流体的双层圆柱壳模型，研究分析了有限元声振耦合法与附加质量法的差异，进而分析了舷间/舷外流体负载、舷间介质及托板对圆柱壳振声性能的影响规律。结果表明：基于AML技术的声振耦合方法对研究水下双层圆柱壳的声振性能更有效；舷间/舷外不同流体负载对结构声振性能影响较大，水的负载效果明显高于空气，低频段起到抑制振动、削减共振峰的效果，而高频段则加大了耦合作用，提高了结构振动响应及辐射效率；在150Hz以下的低频段，舷间为空气时的托板，对结构的振动和声辐射影响较大。

Abstract

Aiming at the present situation of larger underwater vehicle shell radiation noise, the vehicle shell was simplified into a ribbed double-layer cylindrical shell.Considering coupling between double shell layers and inter-board/outboard fluids, the automatic matching acoustic radiation boundary condition technique AML was employed to establish a double-layer cylindrical shell model containing inter-board fluid to study the difference between the finite element vibro-acoustic coupled method and the additional mass method.Effects of inter-board/outboard fluid load, inter-board medium and pallet on the whole shell’s vibro-acoustic performance were analyzed.The results showed that the vibro-acoustic coupled method based on AML technique is more effective to study the vibro-acoustic performance of underwater double-layer cylindrical shell; inter-board/outboard different fluid loads have greater effect on the shell’s vibro-acoustic performance; water’s load effect is obviously higher than air’s, water load has effects to suppress vibration and reduce resonance peaks in lower frequency range, while it increases vibro-acoustic coupled effect to raise structural vibration response and radiation efficiency in higher frequency range; when inter-board fluid is air, pallet has larger influence on the shell’s vibration and acoustic radiation.

导出引用

楼京俊1，屈铎2，唐宇航3，张振海1. 双层圆柱壳舷间声通道对壳体声振性能的影响[J]. 振动与冲击, 2019, 38(23): 165-170

LOU Jingjun1,QU Duo2,TANG Yuhang3,ZHANG Zhenhai1. Effects of double-layer cylindrical shell side to side sound channel on whole shell’s vibro-acoustic performance[J]. Journal of Vibration and Shock, 2019, 38(23): 165-170

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