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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 104
Edited by: J. Pombo
Paper 15

Impact of Rail Cant on the Wheel-Rail Contact Geometry Relationship of Worn Tread

F. Gan and H. Dai

Traction Power State Key Laboratory, Southwest Jiaotong University, China

Full Bibliographic Reference for this paper
F. Gan, H. Dai, "Impact of Rail Cant on the Wheel-Rail Contact Geometry Relationship of Worn Tread", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 15, 2014. doi:10.4203/ccp.104.15
Keywords: rail cant, equivalent conicity, contact bandwidth, contact bandwidth change rate, tread, LMA, S1002CN.

In order to analyse the impact of rail cant on the wheel-rail contact geometry relationship, the calculation methods of some wheel-rail contact relationship index are given, such as equivalent conicity, contact bandwidth and contact bandwidth change rate. The change regulation of the wheel-rail contact relationship indexes for LMA and S1002CN tread have been analysed for the range of rail cant from 1/10 to 1/80, including wheel diameter difference, equivalent conicity, wheel tread contact angle, contact bandwidth and contact bandwidth change rate. In addition, wheel-rail contact point distributions in different rail cant have been drawn. Calculation results show that standard LMA tread has better adaptability to different rail cant than standard S1002CN tread, that is a result of the index of equivalent conicity and the contact bandwidth change rate of the S1002CN tread that have some fluctuation around the rail cant of 1/33. Worn profiles of LMA and S1002CN tread have been measured, and their change in wheel-rail contact relationship index also have been analysed. Comparing the analysis results, equivalent conicity and contact bandwidth change rate are more sensitive to rail cant for standard or worn tread. Calculation results in this paper provide a reference for rail cant design of a real line.

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