Dynamic characteristics of rubber rely on amplitudes and frequencies of external excitation.In order to reflect the real physical properties of the rubbers in railway vehicles and balance the precision and calculation time of the dynamic simulation,a dynamic rubber model is established based on the elastic-plastic theory.The friction forces and viscous forces are used to represent the amplitude-dependence and frequency-dependence of the rubber respectively.The equivalence stiffness and damper of the rubber element are calculated and analyzed under the harmonic excitation.By combining the rubber model and the vehicle-track coupled model,dynamic characteristics of the primary rubber joint are studied in curve negotiation.The results show that equivalence stiffness provided by the friction forces decreases with the increase of the excitation amplitudes,while the damper increases with the increase of the excitation amplitudes.The equivalence stiffness and damper provided by the viscous forcesl both increase with the increase of the excitation frequencies,and in the different phases of curve negotiation,the rubber reflects different dynamic properties.
关键词
机车车辆/橡胶元件/动态特性建模/曲线通过/车辆-轨道耦合动力学
Key words
locomotive/rubber element/modelling of dynamic characteristics/curve negotiation/vehicle-track coupled dynamic
维普
万方数据