基于轮对磨耗数据的CRH2A型动车经济镟修策略研究

为提高镟修策略的经济性,基于轮对磨耗数据,进行CRH2A型动车经济镟修策略研究。在描述动车轮对磨耗的规律时,分别以二次拟合和数理统计的方式建立轮缘厚度的磨耗规律和轮径月磨耗量的规律,其中,轮径分布拟合的优劣采用卡方拟合优度来衡量,轮缘厚度磨耗函数拟合结果使用拟合度来评价。在轮缘厚度磨耗速率模型和轮径磨耗数理统计模型的基础上,采用蒙特卡罗仿真方法模拟动车轮对运行的实际情况,得到121种镟修策略的仿真结果,并选出最优策略。通过实验结果对比分析,该最优策略较现役的固定镟修方案,提高了动车轮对的使用时间,降低了动车运行成本,提高了经济效益。

Economic reprofiling strategy of CRH2A EMU based on wheelset wear data

In order to improve the economy of the reprofiling strategy, based on the wheelset wear data, this paper studied the economic reprofiling strategy of CRH2A EMU. When describing the wear regular pattern of EMU wheelset, the paper established the wear regular pattern of rim thickness and the monthly wear regular pattern of wheel diameter by means of quadratic fitting and mathematical statistics respectively. Among them, the advantages and disadvantages of fitting wheel diameter distribution were measured by the goodness of Chi-square fitting, and the fitting result of wheel rim thickness wear function was evaluated by fitting degree. Based on the wheel flange thickness wear rate model and the mathematical statistics model of wheel diameter wear, the paper used Monte Carlo simulation method to simulate the actual situation of EMU wheelset operation, obtained the simulation results of 121 kinds of reprofiling strategies, and selected the optimal strategy. Through the comparative analysis of the experimental results, and compared with the existing fixed reprofiling scheme, the optimal strategy improves the service time of the EMU wheelset, reduces the operation cost of the EMU and improves the economic benefit.