Comparison of thermal dissipation performances between carbon-ceramic and cast steel brake discs for high-speed train

ZUO Jian-yong; ZHENG Shi-ze; WANG Tian-yi; DING Jing-xian

doi:10.19818/j.cnki.1671-1637.2025.03.016

Volume 25 Issue 3

Jun. 2025

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ZUO Jian-yong, ZHENG Shi-ze, WANG Tian-yi, DING Jing-xian. Comparison of thermal dissipation performances between carbon-ceramic and cast steel brake discs for high-speed train[J]. Journal of Traffic and Transportation Engineering, 2025, 25(3): 242-255. doi: 10.19818/j.cnki.1671-1637.2025.03.016

Citation:

ZUO Jian-yong, ZHENG Shi-ze, WANG Tian-yi, DING Jing-xian. Comparison of thermal dissipation performances between carbon-ceramic and cast steel brake discs for high-speed train[J]. Journal of Traffic and Transportation Engineering, 2025, 25(3): 242-255. doi: 10.19818/j.cnki.1671-1637.2025.03.016

Citation:

ZUO Jian-yong, ZHENG Shi-ze, WANG Tian-yi, DING Jing-xian. Comparison of thermal dissipation performances between carbon-ceramic and cast steel brake discs for high-speed train[J]. Journal of Traffic and Transportation Engineering, 2025, 25(3): 242-255. doi: 10.19818/j.cnki.1671-1637.2025.03.016

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Comparison of thermal dissipation performances between carbon-ceramic and cast steel brake discs for high-speed train

doi: 10.19818/j.cnki.1671-1637.2025.03.016

1.
College of Transportation, Tongji University, Shanghai 201804, China
2.
Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety, Tongji University, Shanghai 201804, China
3.
Postdoctoral Station of Mechanical Engineering, Tongji University, Shanghai 201804, China

Funds:

National Natural Science Foundation of China 62273258

Science and Technology Research and Development Program of China State Railway Group Co., Ltd. N2024J012

More Information

Corresponding author: DING Jing-xian (1994-), male, postdoctoral, PhD, djxdec@163.com
Received Date: 2024-07-15
Accepted Date: 2025-04-06
Rev Recd Date: 2025-02-17
Publish Date: 2025-06-28

Abstract

Abstract

To investigate the braking thermal dissipation performance of traditional cast steel brake discs and new carbon-ceramic brake discs used for high-speed trains at an initial braking speed of 400 km·h^-1, complex front head models of high-speed trains containing carbon-ceramic brake discs and cast steel brake discs were established. An air domain was constructed around the front model. A fluid-solid-thermal coupling simulation method was used to analyze and compare the temperature changes of carbon-ceramic brake discs and cast steel brake discs under emergency braking conditions and their effects on the surrounding air domain. Temperature-related bench tests were also conducted for carbon-ceramic brake discs and cast steel brake discs to verify the accuracy of the simulation. Simulation results show that under an initial braking speed of 400 km·h^-1, the friction surface temperature of the carbon-ceramic brake disc reaches a peak of 1 098.56 K at 86.3 s after braking starts. The overall temperature change trend of the cast steel brake disc is similar to that of the carbon-ceramic brake disc, and their peak friction surface temperature reaches 1 019.26 K at 73 s after braking starts. However, the carbon-ceramic brake disc has a greater impact on the temperature changes in the surrounding air domain, which may pose thermal safety risks in the bogie area of high-speed trains, and the maximum temperature difference between the two air domains can reach 210 K. Compared with the cast steel brake disc, the material and structure of the carbon-ceramic brake disc allow for a faster internal heat conduction rate, a more uniform temperature distribution on the friction surface, and a smaller temperature gradient between different radial areas, resulting in better thermal performance. However, the carbon-ceramic brake disc has a greater impact on the temperature changes in the surrounding air domain, which may pose thermal safety risks in the bogie area of high-speed trains. The comparative results of the bench tests show that the fluid-solid-thermal coupling simulation model of the high-speed train front containing brake discs can accurately predict the trend of temperature changes during braking and can generate detailed temperature change cloud maps.
- vehicle engineering,
- high-speed train,
- fluid-solid-thermal coupling,
- carbon-ceramic brake disc,
- cast steel brake disc,
- thermal dissipation

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References(44)

References

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Comparison of thermal dissipation performances between carbon-ceramic and cast steel brake discs for high-speed train

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