Study On Simulation And Testing Technologies Of The Engine Rubber Mounts’ Nonlinear Characteristics

The vibration level of vehicle is one of the most important indexes for evaluating thelevels of comfort performance and design. Moreover, it will influence the durability and thewhole structural performance of the vehicle. The static and dynamic characteristics of anengine rubber mount are very important to isolation performance. So, the study of enginerubber mount is more and more important. On the basis of the introduction of the rubbermaterials’ nonlinear constitutive theory, the characteristics of the rubber mount of a passengercar engine has been carried on using the finite element simulation and experimental research.First of all, the nonlinear properties of rubber materials are introduced, and the keytechnology of the finite element method analysis is expounded in this paper; Secondly,Nonlinear constitutive model of rubber material is studied, and the Mooney-Rivlin mode ischosen to describe the constitutive model of rubber material combining with the rubber mountresearched in this paper. The material uniaxial compression test of the rubber is carried onAccording to GB/T528-528, by processing of the experimental data, we can determine thematerial parameters of rubber material; Thirdly, this paper establish the CAD model of therubber mount with Catia, which is a kind of the CAD software, then, import the CAD mode toHypermesh to establish finite element model of rubber mount, the static and dynamiccharacteristics of this model is analyzed by Ansys, and the static/dynamic stiffness andhysteresis Angle of the rubber mount. At last, this paper has designed the testing system andexperiment scheme to do experiments on the rubber mount, and the test results has beencompared with the finite element simulation results to come to the conclusion that the finiteelement model is correct.