Railway Dynamics with Curved Contact Patch

Filipe Marques, Hugo Pacheco Magalhaes, Joao Pombo, Jorge Ambrósio, Paulo Flores

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The wheel-rail contact modeling is of paramount importance for the dynamics of railway vehicles since it represents the interaction between the vehicle and the track. Although, in most cases, the contact generated occurs between convex surfaces which results in planar contact areas, the contact might take place in concave surfaces when negotiation sharp curves or due to the wear of profiles. In that cases, the resulting contact area is not planar. This work proposes a methodology to determine the shape of the contact patch in a curved surface, where the normal direction varies along its lateral direction. This method is based on a semi-Hertzian approach and discretizes the contact into longitudinal strips. The normal pressure distribution is computed in each strip separately using a non-Hertzian contact model and it is summed in a vector form to obtain the total normal force magnitude. Regarding the tangential forces, a look up table approach is considered. Finally, a trailer vehicle negotiating a curve is used to demonstrate the effectiveness of this methodology.
Original languageEnglish
Title of host publicationMultibody Mechatronic Systems
Subtitle of host publicationMuSMe 2021
EditorsMartín Pucheta, Alberto Cardona, Sergio Preidikman, Rogelio Hecker
Place of PublicationCham
PublisherSpringer Nature Switzerland AG
Number of pages9
ISBN (Electronic)9783030887513
ISBN (Print)9783030887506, 9783030887537
Publication statusPublished - 14 Oct 2021
Event7th International Symposium on Multibody Systems and Mechatronics - Virtual, Online
Duration: 12 Oct 202115 Oct 2021
Conference number: 7

Publication series

NameMechanisms and Machine Science
PublisherSpringer Nature Switzerland AG
ISSN (Print)2211-0984
ISSN (Electronic)2211-0992


Conference7th International Symposium on Multibody Systems and Mechatronics
Abbreviated titleMuSMe 2021
CityVirtual, Online
Internet address


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