Study on the Effects of Curve Geometry Parameters and Braking Conditions on the Dynamic Characteristics of Train Axle-box Bearing

doi:10.3901/JME.2025.01.187

Abstract

Abstract: The axle-box bearing is a key component of the high-speed train bogie frame. Its dynamic characteristics are crucial for the reliable and safe operation of the vehicle. When a vehicle brakes on a curve track, the dynamic characteristics of the axle-box bearing are extremely complex and unclear. Therefore, a rigid-flexible coupled dynamics model of a high-speed train trailer is established by considering axle-box bearing and braking systems. Then the vibration, dynamic load, and internal contact characteristics of the axle-box bearing under different curve geometric parameters and braking condition are systematically simulated and analyzed when the train passes through a curve track. The results show that when the vehicle drives along a curve track without braking, the lateral acceleration of the axle-box bearing first decreases and then increases with the increase of the super elevation value, and the vertical loads of the axle-box bearings on the left and right sides of the first wheel-set are the same at an equilibrium super elevation value. When the super elevation value is less than the equilibrium super elevation value by about 20 mm, the axial load of the axle-box bearing can be ignored. When the vehicle drives along curve track with braking, the lateral vibration of the axle box bearing becomes more severe if the super elevation value is less than 140 mmm, the vertical load of the axle-box bearing on the first wheel-set decreases, and the axial load located in the outer track direction increases compared with that without braking, causing a significantly increase in difference in the roller-raceway maximum contact stress between two rows.

Key words: axle box bearing, high-speed train, curve radius, super elevation, braking system

CLC Number:

TH113
U271

CHU Ming, YANG Linchuan, WANG Zhiwei, JIANG Zhiwei, WANG Quan, MO Jiliang. Study on the Effects of Curve Geometry Parameters and Braking Conditions on the Dynamic Characteristics of Train Axle-box Bearing[J]. Journal of Mechanical Engineering, 2025, 61(1): 187-198.

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