Viscoelastic Parameter Identification based Structure-Thermal Analysis of Rubber Bushing
Rubber bushing, working as flexible connection parts or vibration isolators, is widely used in commercial vehicles, airplane, and off-highway transportation. The appropriate mathematical modeling of it in proper vehicle simulation is becoming more and more demanding recently. This paper focuses on viscoelastic parameter identification based structure-thermal analysis of rubber bushing so that credible predictions of mechanical behaviors and thermal effects of rubber bushing during service can be made. The dynamic mechanical property is characterized as frequency-dependent and the corresponding parameters’ identifications are carried out through experiment on DMA. A novel approach to estimating the hysteresis damping is proposed on the basis of interaction between carbon black and molecular chain. The quasi-static harmonic excitation tests are carried out to catch the amplitude-dependent hysteresis damping. FEA simulation is employed to predict the rubber’s dynamic response and thermal effect under harmonic excitation with the collected parameters demonstrating mechanical properties.
