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Keywords: wheel/rail contact, friction coefficient, experimental results, test bench, railway dynamics.

Abstract

The importance of the wheel/rail contact problem in railway dynamics problems has led to the publication of many different mathematical methods. This paper summarizes the most important ones, underlining the assumptions made and their implication in the accuracy of the results. From this analysis, one of the main conclusions is that most of them tackle the wheel/rail contact problem mainly from a purely theoretical point of view, and that a theoretical/experimental comparison is required in order to analyse the influence of certain parameters not taken into account in the mathematical developments. Because of this, the second part of this paper summarizes the most important steps followed in building a scaled test-bench to experimentally characterize the wheel/rail contact problem. The results of the longitudinal contact force as a function of the longitudinal creepage are obtained under different conditions; clean and dry, friction modifier, cutting fluid and sand. In addition, the divergences, with respect to Kalker's Simplified Theory, are analyzed.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	International Journal of Railway Technology ISSN 2049-5358 IJRT, Volume 2, Issue 4, 2013 Wheel Rail Contact: Theoretical and Experimental Analysis A. Alonso^1,2, A. Guiral^1,2 and J.G. Gimenez² ¹CEIT, University of Navarra, San Sebastián, Spain ²TECNUN, University of Navarra, San Sebastián, Spain doi:10.4203/ijrt.2.4.2 purchase the full-text of this paper Full Bibliographic Reference for this paper A. Alonso, A. Guiral, J.G. Gimenez, "Wheel Rail Contact: Theoretical and Experimental Analysis", International Journal of Railway Technology, 2(4), 15-32, 2013. doi:10.4203/ijrt.2.4.2 Keywords: wheel/rail contact, friction coefficient, experimental results, test bench, railway dynamics. Abstract The importance of the wheel/rail contact problem in railway dynamics problems has led to the publication of many different mathematical methods. This paper summarizes the most important ones, underlining the assumptions made and their implication in the accuracy of the results. From this analysis, one of the main conclusions is that most of them tackle the wheel/rail contact problem mainly from a purely theoretical point of view, and that a theoretical/experimental comparison is required in order to analyse the influence of certain parameters not taken into account in the mathematical developments. Because of this, the second part of this paper summarizes the most important steps followed in building a scaled test-bench to experimentally characterize the wheel/rail contact problem. The results of the longitudinal contact force as a function of the longitudinal creepage are obtained under different conditions; clean and dry, friction modifier, cutting fluid and sand. In addition, the divergences, with respect to Kalker's Simplified Theory, are analyzed. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to IJRT purchase this issue (price £70 +P&P)
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