摘要
通过调研发现运行于某线的CRH6A城际动车组车轮存在磨耗异常现象和较多以非均衡速度通过曲线的情况。基于运行线路曲线半径及列车运行速度数据,通过建立车辆动力学计算模型和车轮磨耗预测模型研究曲线上列车运行速度对车轮磨耗的影响。结果表明,该城际动车线曲线半径主要为500~3500m,且运行于该线的城际动车组基本均以低于均衡速度的状态通过曲线。在均衡速度以下70%至均衡速度以上10%的范围内通过半径500m曲线,车轮整体磨耗受速度影响较小。在1500m及以上半径曲线上运行时,随速度降低磨耗功指标及磨耗深度指标均呈现增大趋势,尤其是轮缘磨耗指标明显增大。在实际运营过程中应该综合考虑运行安全性和磨耗性能,设定车辆通过曲线速度。总结而言,该城际动车组运营线路曲线半径相对较小且车辆基本低于均衡速度通过曲线导致其车轮磨耗严重,轮缘磨耗尤其严重。
Through research,it is found that the intercity EMU running on a certain line passes through the curve at non-equilibrium speed and abnormal wheel wear exists.Based on the radius of curve line and vehicle running speed,the vehicle dynamic models and the wear prediction model are built to study the effect of running speed on wheel wear.The results show that the curve radius is mainly between 500 m to 3500 m;and the intercity EMU mostly negotiates the curves at a lower speed than the equilibrium speed;In the range of positive 10%and negative 70%of the equilibrium speed,the overall wear and flange wear of the outer guiding wheel are affected by the speed on the curve of 500 m radius slightly.On the curve of 1500 m radius and above,when the vehicle runs at the speed of below the equilibrium speed,the wear power index and the wear depth index would increase with the decrease of speed,especially the flange wear index increases obviously.In the actual operation process,the speed of vehicle passing curve should be chosen under consideration of the running safety and wear performance.In summary,the curve radius of the intercity EMU line are relatively small and the vehicle negotiate the curve at a lower speed than the equilibrium speed,which results in serious wheel wear,especially the serious wheel flange wear.
作者
寇杰
张济民
周和超
王承萍
KOU Jie;ZHANG Jimin;ZHOU Hechao;WANG Chengping(Insitution of Rail Trainsit,Tongji University,Shanghai 201804)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2020年第16期137-146,共10页
Journal of Mechanical Engineering
基金
国家重点研发计划资助项目(2018YFB1201603-08)。
