关键词: 地铁, 曲线钢轨打磨, 车辆运行平稳性, 维修质量, 相关性分析, 改善系数

Abstract: Curve rail grinding for metros can effectively reduce the lateral and vertical vibration acceleration of the vehicle, thereby improving the running stability of vehicles. Using the running stability measurement of vehicles, the paper proposes a vibration evaluation index to evaluate the vibration response degree of the vehicle body passing through a curve and to assess the quality of the curve equipment. To comprehensively evaluate the immediate effect and the ongoing effect of the maintenance quality, a recovery coeffi  cient of the rail grinding operation is proposed. Furthermore, a correlation analysis model between vehicle body vibration response and the quality of the curve rail grinding operation is established. The actual data of Zhengzhou Metro Line 1  is used to verify the 
proposed model. The calculation results show that the model can eff ectively analyze the correlation between the vehicle body vibration response and the quality of rail grinding operations, and play a major role in guiding the track maintenance.

Key words: urban rail transit, curve rail grinding, running stability of vehicles, maintenance quality,  , correlation analysis, recovery coe? , cient