小振幅谐波位移激励下橡胶减振元件动态特性计算方法的研究  

Calculation methods for the dynamic characteristics of rubber isolators under small amplitude harmonic displacement excitations

作　　者：潘孝勇[1,2] 柴国钟[1] 上官文斌[3] 徐驰 

机构地区：[1]浙江工业大学机械制造及自动化省部共建教育部重点实验室,杭州310014 [2]宁波拓普声学振动技术有限公司,宁波315800 [3]华南理工大学汽车工程学院,广州510641

出　　处：《振动与冲击》2009年第2期151-154,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50575073);汽车安全与节能国家重点实验室开放基金资助项目(KF2006-06)

摘　　要：对基于超弹性-粘弹性模型计算橡胶隔振器动态特性的方法进行了研究。阐述了频域粘弹性理论及材料粘弹性参数的获取方法。使用简单剪切动态实验获得了材料的粘弹性参数,结合原有的超弹性模型参数,建立橡胶的超弹性-粘弹性模型,并将该模型应用于简单剪切试件的动态特性计算,计算与实验的对比结果表明:经过静态误差系数修正后的简单剪切试件动态特性与实验值误差较小,且不受超弹性模型的影响。以一悬架橡胶衬套为例,针对不同衬套的缩径量,对橡胶衬套的静、动态特性进行了计算和比较。文中所述的方法将有助于橡胶减振产品的动态特性预测。The approach for calculating the dynamic characteristics of rubber isolators based on hyperelastic-viscoelastic model was investigated.The fundamental theory for frequency domain viscoelasticity was reviewed,and the experimental method for obtaining the viscoelastic parameters of rubber material was presented.A hyperelastic-viscoelastic model of rubber was proposed.The model parameters for viscoelastic model were obtained using dynamic simple shear tests,and the model parameters for hyperelastic model were estimated using uniaxial and planer tension tests.The dynamic properties of the simple shear specimens for obtaining model parameters were calculated with the proposed material model.The calculated results match well the measured data.It is shown that the proposed methods for obtaining model parameters are effective.Taking a suspension bushing as a studying example,the dynamic and static characteristics of the rubber bushing with different diameter-shrinking were calculated,and the results agree well with that of the experiment.The proposed methods for estimating dynamic performances of rubber isolators can be used for calculating the dynamic properties of elastomeric mounts and bushings in automotive industry.

关 键 词：简单剪切 橡胶减振元件 超弹性 粘弹性 有限元分析 缩径量 

分 类 号：TB535.1[理学—物理] TH703.63[理学—声学]