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。
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.
作者
楼京俊
屈铎
唐宇航
张振海
LOU Jingjun;QU Duo;TANG Yuhang;ZHANG Zhenhai(College of Naval Architecture and Ocean,Naval University of Engineering,Wuhan 430033,China;College of Power Engineering,Naval University of Engineering,Wuhan 430033,China;PLA Troop 92578,Beijing 100161,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2019年第23期165-170,共6页
Journal of Vibration and Shock
基金
国家自然科学基金(51679245)
国家自然科学基金青年基金(51509253)
关键词
双层圆柱壳
声振性能
流体负载
托板
double-layer cylindrical shell
vibro-acoustic performance
fluid load
pallet
