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Keywords: train-track dynamics, corrugation, surface initiated, rolling contact fatigue, fatigue models, traction forces.

Summary

The influence of rail and wheel corrugation on vertical and tractive forces is studied, in this paper, for high-speed trains with the aim of evaluating the risk for surface initiated rolling contact fatigue (RCF). A train-track interaction model for vertical dynamics, which accounts for a prescribed torque on the wheelset and for the high-frequency content of the induced force spectrum, is employed. Corrugation distributions according to ISO 3095 (smooth rail) and as obtained from field measurements (corrugated rail) are considered. A parametric study is carried out in which level of corrugation, tractive effort and vehicle speed are varied. Also the influences of axle load and unsprung mass are investigated. The results are interpreted in terms of rolling contact fatigue impact spectra and by using the T-gamma energy model. If is found that the two models give similar tendencies regarding the surface initiated RCF impact. As expected, the traction effort will dominate the development of RCF, but significant influences are also found for corrugation, speed, axle load and unsprung mass.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 110 PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 178 The Influence of Corrugation on Frictional Stress at the Rail-Wheel Interface R. Lundén¹, J.C.O. Nielsen^1,2 and A. Ekberg¹ ¹Chalmers Railway Mechanics, Chalmers University of Technology, Gothenburg, Sweden ²ÅF Industry AB, Gothenburg, Sweden doi:10.4203/ccp.110.178 purchase the full-text of this paper Full Bibliographic Reference for this paper , "The Influence of Corrugation on Frictional Stress at the Rail-Wheel Interface", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 178, 2016. doi:10.4203/ccp.110.178 Keywords: train-track dynamics, corrugation, surface initiated, rolling contact fatigue, fatigue models, traction forces. Summary The influence of rail and wheel corrugation on vertical and tractive forces is studied, in this paper, for high-speed trains with the aim of evaluating the risk for surface initiated rolling contact fatigue (RCF). A train-track interaction model for vertical dynamics, which accounts for a prescribed torque on the wheelset and for the high-frequency content of the induced force spectrum, is employed. Corrugation distributions according to ISO 3095 (smooth rail) and as obtained from field measurements (corrugated rail) are considered. A parametric study is carried out in which level of corrugation, tractive effort and vehicle speed are varied. Also the influences of axle load and unsprung mass are investigated. The results are interpreted in terms of rolling contact fatigue impact spectra and by using the T-gamma energy model. If is found that the two models give similar tendencies regarding the surface initiated RCF impact. As expected, the traction effort will dominate the development of RCF, but significant influences are also found for corrugation, speed, axle load and unsprung mass. purchase the full-text of this paper (price £22) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £85 +P&P)
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