一种基于黏性流体介质的微振动隔振器机理研究  

The mechanism study of a micro-vibration isolator based on viscous fluid

作　　者：王杰[1] 赵寿根[1] 吴大方[1] 罗敏[2] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191 [2]中国空间技术研究院,北京100086

出　　处：《振动工程学报》2015年第2期237-247,共11页Journal of Vibration Engineering

基　　金：国防基础科研计划资助项目(A0820132001);国家自然科学基金资助项目(11432002)

摘　　要：隔振是一种航天器振动控制的重要方法,隔振器内部机理的理论研究是设计隔振器的重要基础。针对航天新型黏性流体微振动隔振器内部阻尼部件,基于其工作原理和变形模式,提出一种理论分析模型。利用固体、流体力学基本原理对其阻尼产生机理及刚度特性进行推导,得到阻尼特性参数和刚度特性参数的理论表达式,并建立了由物理设计参数所表示的振动参数块模型。应用机械阻抗等效理论将隔振器五参数模型转化为便于分析的三参数模型,得到了隔振器的性能目标参数。采用单一变量法分析和研究了隔振器性能目标参数随各设计参数的变化规律,并进行了实验验证。所提的分析理论和方法可为该类型黏性流体微振动隔振器的设计及工程应用提供理论依据和参考。Isolation is one of important methods of spacecraft vibration control,and the theoretical study of isolators′internal mechanism is the foundation to design vibration isolators.In this paper,the internal damping component of a new type of space micro-vibration isolator with viscous fluid is studied.Based on its working principle and deformation mode,a theoretical analy-sis model is proposed.By using the theory of solid and fluid mechanics,the damping generation mechanism and stiffness char-acteristics are derived.Thus,the theoretical expressions of damping and stiffness characteristic parameters are obtained,and then a vibration lumped parameter model which is represented by physical design parameters is established.Through the appli-cation of equivalent theory of mechanical impedance,a simplified three-parameter model is transformed from the five-parameter model of isolator,and in this way,the performance target parameters of this vibration isolator are obtained.The single variable method is used to analyze and study how these performance target parameters vary with each design parameter,and then vali-date them with experiments.The presented analysis theory and method could also provide a reference and theoretical basis for the design and engineering application of viscous fluid micro-vibration isolators.

关 键 词：航天器 微振动隔振器 隔振机理 机械阻抗 参数化研究 

分 类 号：V414.33[航空宇航科学与技术—航空宇航推进理论与工程] O328[理学—一般力学与力学基础]