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M.Sh. Sichani¹, R. Enblom^1,2 and M. Berg¹

¹KTH Royal Institute of Technology, Department of Aeronautical and Vehicle Engineering, Rail Vehicles, Stockholm, Sweden
²Bombardier Transportation, Mainline and Metros Division, Västerås, Sweden

Keywords: non-elliptic rolling contact, wheel-rail contact, virtual penetration, creep curve, dynamics simulation.

Abstract

An approximate rolling contact model is introduced for fast evaluation of the contact patch and stress distribution in the wheel-rail interface, capable of being used on-line with dynamics simulations. The normal part of the model is based on a novel approach in which the surface deformations are approximated, resulting in accurate patch and pressure estimation. The tangential part is based on an adaptation of the FASTSIM algorithm to non-elliptic patches. The new model is compared to the approximate model of Kik and Piotrowski [1] and the results are evaluated using Kalker's CONTACT code. The comparison clearly shows that the new model is more accurate than Kik and Piotrowski's in terms of contact patch and stress distribution as well as creep force estimation.

References

[1]: W. Kik, J. Piotrowski, "A fast approximate method to calculate normal load at contact between wheel and rail and creep forces during rolling", Proceedings of 2nd Mini-Conference on Contact Mechanics and Wear of Rail/Wheel Systems, 338-340, 1996.

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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 3, Issue 3, 2014 Non-Elliptic Wheel-Rail Contact Modelling in Vehicle Dynamics Simulation M.Sh. Sichani¹, R. Enblom^1,2 and M. Berg¹ ¹KTH Royal Institute of Technology, Department of Aeronautical and Vehicle Engineering, Rail Vehicles, Stockholm, Sweden ²Bombardier Transportation, Mainline and Metros Division, Västerås, Sweden doi:10.4203/ijrt.3.3.5 purchase the full-text of this paper Full Bibliographic Reference for this paper M.Sh. Sichani, R. Enblom, M. Berg, "Non-Elliptic Wheel-Rail Contact Modelling in Vehicle Dynamics Simulation", International Journal of Railway Technology, 3(3), 77-96, 2014. doi:10.4203/ijrt.3.3.5 Keywords: non-elliptic rolling contact, wheel-rail contact, virtual penetration, creep curve, dynamics simulation. Abstract An approximate rolling contact model is introduced for fast evaluation of the contact patch and stress distribution in the wheel-rail interface, capable of being used on-line with dynamics simulations. The normal part of the model is based on a novel approach in which the surface deformations are approximated, resulting in accurate patch and pressure estimation. The tangential part is based on an adaptation of the FASTSIM algorithm to non-elliptic patches. The new model is compared to the approximate model of Kik and Piotrowski [1] and the results are evaluated using Kalker's CONTACT code. The comparison clearly shows that the new model is more accurate than Kik and Piotrowski's in terms of contact patch and stress distribution as well as creep force estimation. References [1] W. Kik, J. Piotrowski, "A fast approximate method to calculate normal load at contact between wheel and rail and creep forces during rolling", Proceedings of 2nd Mini-Conference on Contact Mechanics and Wear of Rail/Wheel Systems, 338-340, 1996. purchase the full-text of this paper (price £20) go to the previous paper return to the table of contents return to IJRT purchase this issue (price £70 +P&P)
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