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

被引：0
|
作者：
Lou J. [1 ]
Qu D. [2 ]
Tang Y. [3 ]
Zhang Z. [1 ]
机构：
[1] College of Naval Architecture and Ocean, Naval University of Engineering, Wuhan
[2] College of Power Engineering, Naval University of Engineering, Wuhan
[3] PLA Troop 92578, Beijing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2019年 / 38卷 / 23期
关键词：
Double-layer cylindrical shell; Fluid load; Pallet; Vibro-acoustic performance;
D O I：
10.13465/j.cnki.jvs.2019.23.024
中图分类号：
学科分类号：
摘要：
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. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：165 / 170
页数：5
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