Investigation on the intermittent braking strategy of high-speed train

Abstract

In this article, an intermittent braking strategy (IBS) was proposed to improve the thermal-mechanical performance of the brake system under emergency braking, and its feasibility was performed by the thermal-mechanical-wear coupling analysis model validated with experiment results. According to the simulation results, the maximum thermal stress of brake disk for the conventional continuous braking strategy is about 879 MPa at initial brake speed of 350 km/h, which has exceeded the material property limits, yet the intermittent braking strategies can alleviate it obviously with a decrease of 139 MPa. Furthermore, the maximum temperature and thermal stress of the optimal IBS can be decreased by 18% and 40%, respectively, which shows the significance and validity of the proposed IBS.

Keywords:

• Brake friction pair
• high-speed train
• intermittent braking strategy
• thermo-mechanical-wear coupling analysis

Additional information

Funding

We appreciate the support of National Natural Science Foundation of China (Grant No. 51775386) and Natural Science Foundation of Shanghai (Grant No. 16ZR1438700).