Wheelset climb derailment criteria for evaluation of railway vehicle running safety

CENG Jing; GUAN Qing-hua

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CENG Jing, GUAN Qing-hua. Wheelset climb derailment criteria for evaluation of railway vehicle running safety[J]. Journal of Traffic and Transportation Engineering, 2007, 7(6): 1-5.

Citation:

CENG Jing, GUAN Qing-hua. Wheelset climb derailment criteria for evaluation of railway vehicle running safety[J]. Journal of Traffic and Transportation Engineering, 2007, 7(6): 1-5.

CENG Jing, GUAN Qing-hua. Wheelset climb derailment criteria for evaluation of railway vehicle running safety[J]. Journal of Traffic and Transportation Engineering, 2007, 7(6): 1-5.

Citation:

CENG Jing, GUAN Qing-hua. Wheelset climb derailment criteria for evaluation of railway vehicle running safety[J]. Journal of Traffic and Transportation Engineering, 2007, 7(6): 1-5.

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Wheelset climb derailment criteria for evaluation of railway vehicle running safety

Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

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Author Bio:
Zeng Jing(1963-), male, EngD, professor, + 86-28-86466021, vehicle@home.swjtu.edu.cn
Received Date: 2007-06-05
Publish Date: 2007-12-25

Abstract

Abstract

In order to understand the mechanism and the main factors that cause vehicle climb derailment, the forces exerted on wheelset in 3D space were analyzed, the general ratio formulae of wheel/rail lateral force to vertical force were derived.It was assumed that wheelset reached the critical state of derailment when flange contact occurred, full friction sliding between wheel and rail appeared, 2D evaluation derailment criterion of wheelset without considering wheelset yaw angle was derived, and 3D criterion with taking into account wheelset yaw angle and the effect of wheel/rail creepages was given.The concept of wheelset derailment coefficient was defined, and the combination of wheelset derailment coefficient and wheel load reduction rate was utilized to evaluate derailment.Simulation result shows that 2D criterion is more conservative for derailment evaluation compared with 3D criterion; smaller and negative yaw angles can mitigate derailment possibility, the critical derailment curve of 3D criterion tends to the situation of 2D criterion at larger wheelset yaw angles; the reduction of friction coefficient and the increase of flange angle are advantageous for preventing derailment.
- vehicle engineering,
- wheelset,
- climb derailment criteria,
- wheelset derailment coefficient,
- wheel load reduction rate

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References(13)

References

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