Computational Technology Resources - CCC

H. Magalhaes¹, F. Marques², J. Pombo^1,3,4 and J. Ambrosio¹

¹IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
²CMEMS-UMinho, Departamento de Engenharia Mecânica, Universidade do Minho, Guimarães, Portugal
³Institute of Railway Research, School of Computing and Engineering, University of Huddersfield, Huddersfield, United Kingdom
⁴ISEL, Instituto Politécnico de Lisboa, Lisboa, Portugal

doi:10.4203/ccc.1.21.12

H. Magalhaes, F. Marques, J. Pombo, J. Ambrosio, "On the surface parameterization of wheels and rails with defects for vehicle-track dynamic analysis", 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 21.12, 2022, doi:10.4203/ccc.1.21.12

Keywords: wheel-rail contact, wheel defect, rail defects, surface parameterization, experimental measurements.

Abstract

Wheel and rails develop localized defects on their surfaces that play a key role in the vehicle-track interaction. The impact of these defects on railway assets can be cheaply investigated by developing adequate multibody simulations. A series of measured profiles are required to model both wheel and rail, however, the accuracy of the wheel-rail contact forces depends not only on the number of measured profiles, but also on the robustness of the parameterization method of the wheel and rail surfaces. This paper aims to study wheel and rail surface parameterization methodologies that require minimum measurements for realistic vehicle-track interaction studies. A wheel with idealized defects on the tread and flange back is considered in this work from which the number of measured profiles is varied. In turn, different parameterization schemes are used, namely splines and shape preserving polynomials and parameterized and non-parameterized profiles are utilized. This work highlights the advantages and disadvantages of increasing the number of profiles, depending on the parameterization method.

download the full-text of this paper (PDF, 6 pages, 335 Kb)

go to the previous paper
go to the next paper
return to the table of contents
return to the volume description

	Computational & Technology Resources an online resource for computational, engineering & technology publications
	not logged in - login
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 21.12 On the surface parameterization of wheels and rails with defects for vehicle-track dynamic analysis H. Magalhaes¹, F. Marques², J. Pombo^1,3,4 and J. Ambrosio¹ ¹IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal ²CMEMS-UMinho, Departamento de Engenharia Mecânica, Universidade do Minho, Guimarães, Portugal ³Institute of Railway Research, School of Computing and Engineering, University of Huddersfield, Huddersfield, United Kingdom ⁴ISEL, Instituto Politécnico de Lisboa, Lisboa, Portugal doi:10.4203/ccc.1.21.12 Full Bibliographic Reference for this paper H. Magalhaes, F. Marques, J. Pombo, J. Ambrosio, "On the surface parameterization of wheels and rails with defects for vehicle-track dynamic analysis", 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 21.12, 2022, doi:10.4203/ccc.1.21.12 Keywords: wheel-rail contact, wheel defect, rail defects, surface parameterization, experimental measurements. Abstract Wheel and rails develop localized defects on their surfaces that play a key role in the vehicle-track interaction. The impact of these defects on railway assets can be cheaply investigated by developing adequate multibody simulations. A series of measured profiles are required to model both wheel and rail, however, the accuracy of the wheel-rail contact forces depends not only on the number of measured profiles, but also on the robustness of the parameterization method of the wheel and rail surfaces. This paper aims to study wheel and rail surface parameterization methodologies that require minimum measurements for realistic vehicle-track interaction studies. A wheel with idealized defects on the tread and flange back is considered in this work from which the number of measured profiles is varied. In turn, different parameterization schemes are used, namely splines and shape preserving polynomials and parameterized and non-parameterized profiles are utilized. This work highlights the advantages and disadvantages of increasing the number of profiles, depending on the parameterization method. download the full-text of this paper (PDF, 6 pages, 335 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
Back to top	©Civil-Comp Limited 2023 - terms & conditions