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L. Liu, B. Yi, "A gradient-based approach for wheel-rail contact point determination", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 21.3, 2022, doi:10.4203/ccc.1.21.3

Keywords: contact points, gradient-based approach, conformal contact, wheel profile.

Abstract

The mainstream of solving wheel-rail contact problem is employing geometry constraints to locate contact point with discrete steps, which is difficult to optimize wheel-rail contact behaviour in their lifecycle. This work shows the approach developed to determine wheel-rail contact point with gradient-based optimization model, which converts the discrete problem into a continuous one by introducing optimization pipeline including Helmholtz partial differential and step differential function for design variables filtering and projection, respective. The effectiveness of the proposed method is demonstrated with wheel profile under various service stages, which can be used for continuous optimization of the wheel-rail contact behaviour.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 1 PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 21.3 A gradient-based approach for wheel-rail contact point determination L. Liu and B. Yi School of Traffic and Transportation Engineering, Central South University Changsha, China doi:10.4203/ccc.1.21.3 Full Bibliographic Reference for this paper L. Liu, B. Yi, "A gradient-based approach for wheel-rail contact point determination", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 21.3, 2022, doi:10.4203/ccc.1.21.3 Keywords: contact points, gradient-based approach, conformal contact, wheel profile. Abstract The mainstream of solving wheel-rail contact problem is employing geometry constraints to locate contact point with discrete steps, which is difficult to optimize wheel-rail contact behaviour in their lifecycle. This work shows the approach developed to determine wheel-rail contact point with gradient-based optimization model, which converts the discrete problem into a continuous one by introducing optimization pipeline including Helmholtz partial differential and step differential function for design variables filtering and projection, respective. The effectiveness of the proposed method is demonstrated with wheel profile under various service stages, which can be used for continuous optimization of the wheel-rail contact behaviour. download the full-text of this paper (PDF, 5 pages, 471 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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