钢轨廓形周期性变化下地铁车辆运行速度对车辆平稳性的影响研究

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中图分类号：U270 文献标志码：A doi：10.3969/j.issn.1006-0316.2025.11.004

文章编号：1006-0316（2025）11-0023-08

Abstract ∵ In response to the vehicle body swaying phenomenon observed during high-speed operation， field measurements of vehicle ride stabilityand rail profile data were conducted.A vehicle system dynamics model was developed while both constant and periodic variations in rail profiles were taken into consideration.The study investigated the impact of running speed on metro vehicle stability when operating on tracks with different rail profile conditions.The research reveals that the metro vehicles primarily experience swaying during high-speed operation. When such swaying occurs，the lateral ride stability of the vehicles registers high values， exceding the standard threshold of3.0，whilethe vertical ride stabilityremains relativelylow.Whenthe vehicle traverses a track segment with a consistently uniform CN6O standard rail profile at varying operational speeds， the lateral ride stability exhibits a pronounced upward trend with increasing velocity，peaking at a value of 2.95. Meanwhile，the lateral vibration acceleration of the carbody fluctuates within a range of -0.15g to 0.14g. reflecting the dynamic response characteristics under these conditions.When the rail profile exhibits periodic variationsalong the track，the lateral ride stabilityofthevehicle at diferent operating speeds consistently exceed those measured under uniform rail profile conditions.Moreover，the indices increase more sharply with rising speed，reaching a maximum value of 3.44.The lateral vibration acceleration of the carbody fluctuates within a range of -0.17g to 0.26g ，asignificant increase compared to the case with constant rail profiles.Notably， the dominant peak frequencies of the vibration acceleration align with the track excitation passing frequencies，and the amplitudes at these peak frequencies escalate continuously as the vehicle speed increases.

Key words ： metro vehicle ;rail profile i periodic change ; speed ; ride stability

地铁以其能耗低、载客量大以及运行安全性高等显著优势，逐渐成为大型城市公共交通系统的核心组成部分[1]。（剩余7301字）