Uneven Wear of Running Wheel Tires of Straddle Monorail Train
QIU Chengqun1,2, LI Peirun3, CHEN Zhao1, LI Kaiqiang1
1. School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China; 2. Jiangsu Province Intelligent Optoelectronic Devices and Measurement-Control Engineering Research Center, Yancheng Teachers University, Yancheng 224007, China; 3. School of Mechanical Engineering, Yancheng Institute of Technology, Yancheng 224051, China
Abstract：Aiming at investigating the correlation between the parameters of a vehicle’s secondary suspension structure and the uneven wear of the running wheel tires, the goal of optimization was to improve the uneven wear performance of the running wheel tires and the design variables are the vehicle’s secondary suspension parameters. An indirect method of evaluating the running wheel wear was established from the analysis of a finite element model and by combining with evaluation indexes of the running wheel wear characteristics. This method minimizes the running wheel tire wear by exploring the effects of the slip angle and roll angle of the running wheel tires and their combination on the wear and uneven wear of the running wheel tires, and by optimizing the vehicle’s secondary suspension parameters. The results show that before optimization, the slip angles of the front and rear running wheels of the bogie (where the former bogie is taken as an example) are 0.5°, 0.3°, -0.4°, and -0.2°, respectively, and that the slip angles of the rear running wheel tires are 0.2°, 0.2°, -0.2°, and -0.2°, respectively. Among the vehicle structural parameters, the lateral stiffness of the secondary suspension and the vertical stiffness of the secondary suspension strongly affect the uneven wear of the running wheel tires, which can be reduced to a certain extent by selecting appropriate parameter values.
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