Volume 42 Issue 1
Feb.  2024
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LI Xue, WANG Yuexin, WANG Kaiyun. Influences of Wheel Rail Friction Coefficient on the Dynamic Response and Wheel Wear of Low Floor Light Rail[J]. Journal of Transport Information and Safety, 2024, 42(1): 41-48. doi: 10.3963/j.jssn.1674-4861.2024.01.005
Citation: LI Xue, WANG Yuexin, WANG Kaiyun. Influences of Wheel Rail Friction Coefficient on the Dynamic Response and Wheel Wear of Low Floor Light Rail[J]. Journal of Transport Information and Safety, 2024, 42(1): 41-48. doi: 10.3963/j.jssn.1674-4861.2024.01.005
shu

Influences of Wheel Rail Friction Coefficient on the Dynamic Response and Wheel Wear of Low Floor Light Rail

doi: 10.3963/j.jssn.1674-4861.2024.01.005
  • 1.

    School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou 7330070, China

  • 2.

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

  • Received Date: 2023-03-29
    Available Online: 2024-05-31
    Abstract
  • Taking a certain light rail line as the basis, a low-floor trams vehicle-track coupled dynamic model is established utilizing the multi-body dynamics software Universal Mechanism (UM). LM wear-type treads and R50 standard rails are selected, and the US VI irregularity track spectrum is used as the line excitation. Firstly, the vehicle's dynamic response and wheel wear is studied under five different friction coefficients, based on Hertz and simplified Kalker theories, as well as the Archard model. Then, the variation patterns of safety indicators under 96 groups of wheel wear profiles, corresponding to four different running mileage stages, are further analyzed. Finally the changes of the safety indicators of the vehicle passing through curves under different wheel wear profiles at four different mileage stages with the friction coefficient are studied. The results show that the derailment coefficient, lateral wheelset force, lateral wheel-rail force and lateral car-body acceleration are significantly influenced by the friction coefficient, whereas the wheel load reduction rate and vertical car-body acceleration are not sensitive to changes in the friction coefficient. The depth of wheel wear increases with mileage and friction coefficient, and the wear situation of independently rotating wheels is more severe under the same working conditions. After the vehicle has traveled 40 000 km, the lateral wheel-rail force, lateral wheelset force and derailment coefficient generally exhibit an increasing trend with mileage, while the wheel load reduction rate remains unaffected. Under the combined effects of different friction coefficients and operating mileages, the positions of peak values of the lateral wheel-rail force, lateral wheelset force and derailment coefficient occur at different locations, while the wheel load reduction rate remains relatively stable.

     

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