Influence of track irregularity and wheel-rail profile compatibility on metro vehicle sway

doi:10.3785/j.issn.1008-973X.2022.09.010

Journal of ZheJiang University (Engineering Science)

2022, Vol. 56

Issue (9): 1772-1779 DOI: 10.3785/j.issn.1008-973X.2022.09.010

Influence of track irregularity and wheel-rail profile compatibility on metro vehicle sway

Bin ZHANG(

),Qing-hua GUAN*(

),Wei LI,Ya-bo ZHOU,Ze-feng WEN

State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China

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Abstract

In order to comprehensively analyze the influence mechanism of track irregularity and wheel-rail profile compatibility on metro vehicle sway, a combination of dynamic test and numerical simulation was used to study. The lateral vibration acceleration of swaying vehicle, wheel-rail profile and track irregularity were tested. The characteristics of vehicle sway and differences in wheel-rail profile compatibility were revealed. The influence of track irregularity and wheel-rail profile compatibility on vehicle sway were analyzed. Results show that the ride quality will be seriously affected when there is periodic irregularity on the metro operation lines. The difference in the proximity of bogie hunting frequency due to wheel-rail profile compatibility, track excitation frequency and carbody sway modal frequency is the cause of the difference of vehicle ride quality. Measures should be taken in time to treat periodic irregularities on the lines. Meanwhile, reasonable control of the equivalent conicity of wheel-rail profile compatibility can effectively improve the running quality of metro vehicle.

Key words： metro vehicle sway wheel–rail profile compatibility track irregularity coupling resonance

Received: 18 October 2021 Published: 28 September 2022

CLC:

U 270.1

Fund: 国家自然科学基金资助项目(51305360)；广西科技计划项目(2020AC15009)；牵引动力国家重点实验室自主研究课题(2020TPL-T02)

Corresponding Authors: Qing-hua GUAN E-mail: 15191092547@163.com;guan_qh@163.com

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Cite this article:

Bin ZHANG,Qing-hua GUAN,Wei LI,Ya-bo ZHOU,Ze-feng WEN. Influence of track irregularity and wheel-rail profile compatibility on metro vehicle sway. Journal of ZheJiang University (Engineering Science), 2022, 56(9): 1772-1779.

URL:

https://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2022.09.010 OR https://www.zjujournals.com/eng/Y2022/V56/I9/1772

轨道不平顺与轮轨匹配对地铁车辆晃动的影响

为了综合分析轨道不平顺与轮轨匹配对地铁车辆晃动的影响机理，采用动力学试验与数值仿真相结合的方法展开研究. 测试车辆晃动的横向振动加速度、轮轨廓形及轨道不平顺，掌握车辆晃动、不同轮轨匹配特征，分析轨道不平顺及轮轨匹配对车辆晃动的影响. 结果表明：当地铁运行线路存在周期性轨道不平顺时，将严重影响车辆平稳性；不同轮轨型面匹配引起的转向架蛇行运动频率与轨道激励频率、车体滚摆模态频率的接近程度不同，是导致车辆平稳性存在差异的原因. 及时处理轨道周期性不平顺，合理控制轮轨型面匹配的等效锥度能够有效改善地铁车辆的运行品质.

关键词： 地铁车辆, 晃动, 轮轨匹配, 轨道不平顺, 耦合共振

Fig.1 Layout diagram of carbody vibration acceleration measuring points

Fig.2 Characteristic analysis of carbody lateral vibration acceleration

Fig.3 Lateral Sperling index of vehicles with different mileages after wheel re-profiling

Fig.4 Profiles and wear distribution of wheels with different mileages after re-profiling

Fig.5 Measured rail profiles and vertical deviation

Fig.6 Contact point pair distribution of wheel rail

Fig.7 Equivalent conicity with different wheel-rail profile compatibilities

Fig.8 Dynamic model of metro vehicle

Tab.1 Design parameters of metro vehicle

Fig.9 Contour map of lateral Sperling index of vehicle

Fig.10 Frequencies and damping ratios of bogie hunting motion and carbody suspension modes

Fig.11 Modal frequency with different equivalent conicities

Fig.12 Lateral Sperling index in different excitation conditions

Tab.2 Comparison of equivalent conicity with different wheel-rail profile compatibilities

Tab.3 Comparison of calculation results of vehicle lateral Sperling index with different wheel-rail profile compatibilities


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