Research on Wear Law and Prediction of Urban Rail Train Wheelset
In order to actualizing the prediction for wheel diameter and flange thickness,this article focuses on the numerical method to compute wheelset wear prediction urban rail train.Taking the data of wheel set size from a metro line,this study col-lects four characteristic parameters:wheel diameter,wheel flange thickness,wheel diameter difference and wheel position,and analyzes the influence regular pattern of characteristic parameters on the wear rate of wheelset.With XGBoost method,this study establishes a simulation model of wear rate of wheel diameter and flange thickness based on these four characteristic parameters.The error of the result calculated with the model is within the allowable range,which shows that this model has a good effect when calculating wear rate.Further more,we establish a prediction model of wheel diameter and flange thickness,and carry out practical verification on prediction model with measured data which comes from eitht wheels of a carriage in half a year.The com-parison result shows that the predicting results are agreeable with the measured data.The average prediction errors of the wheel di-ameter and flange thickness are less than0.175mmand0.3125mmrespectively at the running mileage of80000km.
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