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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 104
Edited by: J. Pombo
Paper 17

The Research of the Relation between Wheel Re-Profile and Wheel-Rail Dynamics for the Jing-Jin Inter-City High-Speed CRH3C EMU

X.Q. Dong1,2, Y.M. Wang2, Z.S. Ren1 and L.D. Wang2

1School of Mechanical, Electric and Control Engineering, Beijing JiaoTong University, Beijing, China
2Locomotive & Car Research Institute, China Academy of Railway Sciences, Beijing, China

Full Bibliographic Reference for this paper
X.Q. Dong, Y.M. Wang, Z.S. Ren, L.D. Wang, "The Research of the Relation between Wheel Re-Profile and Wheel-Rail Dynamics for the Jing-Jin Inter-City High-Speed CRH3C EMU", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 17, 2014. doi:10.4203/ccp.104.17
Keywords: wheel re-profiles, EMU, equivalent conicity, dynamic simulation, line test.

CRH3C electric multiple unit (EMU) is one of the main EMU types operating in the Jing-Jin inter-city high-speed railway, of which lateral car-body instability has arisen after some service wheels have been re-profiled. In order to search for the reason and solution, long-term measurement and research of the wheel-rail contact, and its influence to the dynamic behaviour of CRH3C EMU in Jing-Jin inter-city high-speed railway, was carried out. The research showed that too low wheel-rail equivalent conicity after wheel re-profileing lead to high oscillation in the carbody. One feasible solution is a new thin flange width wheel profile. Development and design of new thin flange wheel profile had been carried out. A series of a new thin flange wheel profiles are designed for CRH3C EMU of Jing-Jin inter-city railway after theoretical analysis and test certification. The wheel-rails relation simulation, dynamic simulation, try re-profile and operational line test show that the new series of profiles not only guaranteed the running performance by restoring the appropriate wheel-rail contact, but also effectively reduced the loss of the wheel diameter, extending the lifetime of wheels. Up to now, the new designed thin flange wheel profiles have been put in use for all CRH3C EMUs on the high-speed railway in China.

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