Study on Wheel Profile Evolution for Dynamic Curve Passing Performance of Heavy Haul Locomotive
Based on the vehicle-rail coupling dynamics theory,Kik-Piotrowski algorithm and Archard wear model,the predic-tion model of heavy-haul locomotive dynamics and wheel wear was established with UM software.The influence of wheel profile evolution on the passing performance of curves with different radius was analyzed,and the accuracy of the model was verified by comparing with the measured data.The dynamic indexes and wheel/rail wear parameters under different radius curves were stud-ied.The simulation results show that the derailment coefficient and wheel load reduction rate increase obviously in the early stage of wheel profile evolution,which is not conducive to the safe passage of the locomotive curve.The minimum values of wheel load reduction rate and body lateral acceleration are obtained at the radius of 900m,and the wheel/rail wear index decreases the most at the radius of(300～600)m,in which the wear index is 66.5%.It is recommended that the radius of the design curve be avoided from 300 to 600m,and 900m is the best.
NETL
NSTL
万方数据
维普
