确定性激励时多阻尼介质耦合型非线性隔振器传递率特性研究  

STUDY OF CHARACTERISTICS OF THE CARRY-OVER FACTOR OF A MULIT-DAMPING-MEDIUM COUPLING NONLINEAR ISOLATOR UNDER DETERMINISTIC EXCITATION

作　　者：杨平[1,2] 钟毅芳[3] 周济[3] 

机构地区：[1]桂林电子工业学院电子机械系 [2]华中科技大学CAD工程中心武汉430074 [3]华中科技大学CAD工程中心

出　　处：《机械强度》2002年第2期202-205,共4页Journal of Mechanical Strength

基　　金：国防科技预研基金项目资助 (0 0J1 6 .2 .5 .DZ0 50 2 );广西自然科学基金项目资助 (0 1 4 1 0 4 2 )

摘　　要：基于抗大冲击并衰减振动的工程应用要求 ,提出一种多阻尼介质耦合型非线性隔振器的数学模型 ,该模型考虑了平方阻尼、线性阻尼、库伦阻尼及非线性弹性元件的耦合 ;通过无量纲变换并结合傅里叶变换和谐波平衡法对模型进行了理论上近似求解 ;具体讨论了非线性特性参数变化引起的传递率特性变化波动 ,分析结果表明多阻尼介质耦合型非线性隔振系统具有多变性态 ,特别是出现了共振前的低频减振特性 ,这些特性的呈现可能还与具体器件的其他初始物理条件有关 ,其应用和控制有待于进一步器件模拟和机理研究。A mathematical model of a multi damping medium coupling isolator is built for the demand of resisting violent impact and attenuating vibration based on actual applying. The coupling of quadratic damping, viscosity damping, Coulomb damping and nonlinear spring are introduced in the model. The approximate theoretical calculating formulae are deduced by combining non dimension transform, Fourier transform and harmonic balance method. Analytical results is illustrated to show that the multi damping medium coupling isolator has some multi change performance mode, especially, show low frequency attenuation characteristics before the resonance frequency. The present of these characteristics may be relative to the other original physical condition of the actual device, the applying of these characteristics depend on the study of the simulation of the device and physical mechanism.

关 键 词：多阻尼介质耦合隔振器 非线性 模型 传递率 

分 类 号：O328[理学—一般力学与力学基础] O322[理学—力学]