针对小几何尺度的无人航行器(Unmanned Underwater Vehicle，UUV)中减振技术的应用问题，建立尺度较小的SUBOFF无人航行器有限元模型。分析其在典型激励下的声振特性，探讨阻振、吸振技术在UUV上的应用，并且基于声学黑洞结构设计UUV舱段，分析其减振效果。研究结果表明:无人航行器结构振动和辐射噪声的峰值频率与整体和局部结构的模态频率关系较大。在推进电机基座、推力轴承基座等结构上应用阻振质量和动力吸振器可有效减小艇体振动，吸振器质量增加可改善吸振效果。设计声学黑洞(Acoustic Black Hole，ABH)舱段并应用于艇体的中部均匀部分，可有效减小结构振动由激励源向船艏的传递，体现该方案的减振效果。
Application Research of Vibration and Noise Reduction Technology for Unmanned Underwater Vehicles
Aiming at the application of vibration reduction technology in unmanned underwater vehicles (UUV) with small geometric scales,a finite element model of SUBOFF unmanned underwater vehicle with a small scale was established.The vibration and acoustic characteristics under typical excitation were analyzed,the application of vibration resistance and absorption technology in UUV was discussed,and the UUV module was designed based on the acoustic black hole structure,and its vibration reduction effect was analyzed.Results demonstrate that the peak frequency of structural vibration and radiat-ed noise of UUV has a great relationship with the modal frequency of the overall and local structures.Applying vibration re-sistance mass and power shock absorber at the propulsion motor base and thrust bearing base can effectively reduce the vi-bration of the hull.Increasing the mass of the shock absorber can improve the vibration absorption effect.The acoustic black hole cabin was designed and applied to the uniform part of the middle part of the hull,which can effectively reduce the trans-mission of structural vibration from the excitation source to the bow,reflecting the vibration reduction effect of the scheme.
acousticsunmanned underwater vehiclevibration and noise reduction technologyacoustic black holesvibration resistancevibration absorber
万方数据
维普
