• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2020, Vol. 56 ›› Issue (8): 172-181.doi: 10.3901/JME.2020.08.172

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Simulation of Temperature Field of Train Axle-mounted Disk Braking Based on Rotating Heat Flux Method and Uniformly Distributed Heat Flux Method

ZHANG Jinyu, YU Dalian, LIU Shaoqing, TIAN Aiqin   

  1. National Research Center of High-speed EMU Assembly Engineering Technology, CRRC Qingdao Sifang Co., Ltd., Qingdao 266111
  • Received:2019-04-10 Revised:2019-07-30 Online:2020-04-20 Published:2020-05-28

Abstract: Aiming at the insufficient research of the influence of the frictional heat flux loading method on the braking temperature field of the train axle-mounted disk, the variation law and differences of the temperature field of the brake disc calculated by the two frictional heat flux loading methods (rotating heat flux method and uniformly distributed heat flux method) under different braking conditions are systematically investigated. The calculation results show that under different braking conditions, for the maximum temperature point on the disk surface, the calculated temperature and its change characteristics based on the two heat flux loading methods are quite different. At the same time, the differences are closely related to the conditions of the pad-disk contact area, the initial braking speed, the braking deceleration and the wheel weight. With the increase of the distance below the disk surface, the differences between the temperature and its change characteristics calculated by the two frictional heat flux loading methods decrease rapidly, and for the point of 2 mm below the disk surface, the differences can be approximately ignored. In addition, under the condition of continuous braking, the calculated differences between the temperature and its change characteristics based on the two heat flux loading methods in a certain braking are not related to the previous braking. Based on this rule, a fast algorithm for the maximum temperature value of the brake disc is proposed. Theoretical basis is provided for the selection of the frictional heat flux loading method in the calculation of the braking temperature field of the train axle-mounted disk.

Key words: axle-mounted disk braking, rotating heat flux method, uniformly distributed heat flux method

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