橡胶隔振器高频动态特性的计算方法  

COMPUTATIONAL METHOD FOR THE DYNAMIC PROPERTIES OF RUBBER ISOLATORS

作　　者：唐安特 上官文斌[1] 潘孝勇 刘文帅 何青 AHMED Waizuddin TANG An-te;SHANGGUAN Wen-bin;PAN Xiao-yong;LIU Wen-shuai;HE Qing;AHMED Waizuddin(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510641,China;Ningbo Tuopu Group Co.,Ltd.,Ningbo 315800,China)

机构地区：[1]华南理工大学汽车工程学院,广州510641 [2]宁波拓普集团股份有限公司,宁波315800

出　　处：《工程力学》2020年第1期230-238,共9页Engineering Mechanics

摘　　要：该文采用一种由 Mooney-Rivlin 模型和多个 Maxwell 模型叠加组成的非线性粘弹性本构模型,用于计算橡胶隔振器的高频动态特性。该文给出了在时域和频域范围内拟合本构模型中粘弹性参数的方法,利用拟合得到的本构模型参数,对某款橡胶悬置跨点动态特性进行计算,并与实验结果进行对比。该文还建立了橡胶隔振器等效力学模型,分析了原点动刚度和跨点动刚度的区别,分析表明:使用跨点动态特性测试法可消除测试中附加惯性力的影响,适用于橡胶隔振器高频动特性的测试;同时,该文搭建了橡胶隔振器有限元模型,分别用于分析其跨点动刚度与原点动刚度,并将分析结果与实验结果进行对比,分析结果验证了有限元模型和力学模型的正确性。除此之外,该文还分析对比了时域(松弛、蠕变)和频域(简谐动态试验)拟合粘弹性参数方法的优缺点。To predict the dynamic properties of rubber isolators,a nonlinear viscoelastic model consisting of the Mooney-Rivlin model and multiple Maxwell models is proposed in this paper.The method of fitting the viscoelastic parameters in the time domain and frequency domain is given.Using the estimated model parameters and the developed finite element model,the dynamic characteristics of a rubber mount are calculated and compared with experimental results.In addition,we set up an equivalent mechanical model of the dynamic stiffness of rubber isolators and analyze the difference between the original point dynamic stiffness and the cross-point dynamic stiffness.The results show that the influence of the additional inertia force in the test can be eliminated by using the cross-point dynamic test method,which is suitable for the test of the dynamic characteristics of the rubber isolators.Meanwhile,a finite element model of rubber isolators is built to analyze the cross-point dynamic stiffness and original point dynamic stiffness.The analysis results are compared with the experimental results to verify the correctness of the finite element model and the mechanical model.The advantages and disadvantages of three methods for fitting the viscoelastic parameters in the time domain (relaxation and creep) and frequency domain (simple harmonic dynamic test) are analyzed.

关 键 词：橡胶隔振器 非线性本构模型 动态特性 参数拟合 跨点动特性 

分 类 号：TB535.1[理学—物理]