A transient rolling contact finite element model using ANSYS/LS-DYNA was developed based on the parameters of the wheel-rail rolling behavior(WRRB)test rig,in order to study the rolling contact and wear characteristics of scaled wheel-ring rail.The elastic creepage solving program and Ty wear model were integrated in the model,and the model was verified by experiment.The wheel-rail force,creepage,contact stress and rail wear depth were investigated,and the influences of wheel driving torque and speed were analyzed.The results showed that,the vertical wheel-rail force fluctuation was caused by the high frequency elastic vibration of the scaled wheel-ring rail structure.The longitudinal dynamic behavior and rail wear depth change trend were consistent with those of in-service wheel-rail under proportional load.Due to the small curve radius of the ring rail,the creep force and rate,the spin creepage and the rail wear depth under free rolling condition were large,and the peak value of tangential contact stress appeared on both sides behind the contact patch.The influence rules of wheel driving torque and speed can be fitted into a set of empirical formulas.The research can provide a theoretical basis for the design and application of this kind of test rig.
关键词
缩尺车轮-环轨/显式有限元法/瞬态滚动接触/蠕滑/磨耗
Key words
scaled wheel-ring rail/explicit finite element method/transient rolling contact/creep/wear
维普
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