CRH380B动车组轮对高级修轮缘厚限值优化的可行性研究

Feasibility Study of CRH380B EMU Wheel Set Advanced-reprofiling on the Optimization of the Limit of Flange Thickness

为了优化CRH380B动车组轮缘厚高级修镟修限值,基于不同轮缘厚条件下的轮对磨耗规律和车辆动力学性能分析,采用多体动力学软件和Archard磨耗理论联合仿真求解的方式,利用非线性磨耗模型对车轮磨损进行预测,并使用多体并行仿真方法实时更新状态参数和接触力。结合仿真计算分析结果,并与实测数据对比,可发现当车辆运行速度低于350 km/h时,轮缘厚度对轮径磨耗量无明显影响;当车轮发生磨耗后,设置不同轮缘厚车轮的动车组均保持良好的动力学性能。因此,在保证车辆运行品质和安全性的基础上可以将高级修轮缘厚镟修限值降低至28 mm,提高车轮使用寿命,降低动车组运营成本。

In order to optimize the limit value of CRH380B EMU flange thickness based on the wear law of wheelset and vehicle dynamics performance under different flange thickness,the numerical solution method combined with the multibody kinetic software and Archard wear theory were used.The nonlinear wear equation was used to predict the wheel wear and the multi-body parallel simulation method was used to update the state parameters and contact forces in real time.Combined with the simulation analysis and the comparison of measured data,the results show that the thickness of the flange has no significant influence on the wheel wear when the running speed of the vehicle is lower than 350 km/h.At the same time,after the occurrence of wheel wear,the vehicle sets with different flange thickness still maintain good dynamic performance.Therefore,on the basis of ensuring the running quality and safety of the vehicle,the limit value of the flange thickness can be reduced to 28 mm to improve the service life of the wheels and reduce the operating cost of EMU.