A fast non-elliptic contact model for application to rail vehicle dynamics simulation

M. Sh Sichani, Roger Enblom, Mats Berg

Research output: Contribution to journalArticle

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 and the results are evaluated using the rigorous solution of Kalker's CONTACT code. The comparison clearly shows the new model to be more accurate than Kik-Piotrowski's in terms of contact patch and stress distribution as well as creep force estimation.

LanguageEnglish
Article number266
JournalCivil-Comp Proceedings
Volume104
Publication statusPublished - 2014
Externally publishedYes

Fingerprint

Rails
Computer simulation
Stress concentration
Wheels
Creep

Cite this

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title = "A fast non-elliptic contact model for application to rail vehicle 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 and the results are evaluated using the rigorous solution of Kalker's CONTACT code. The comparison clearly shows the new model to be more accurate than Kik-Piotrowski's in terms of contact patch and stress distribution as well as creep force estimation.",
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A fast non-elliptic contact model for application to rail vehicle dynamics simulation. / Sichani, M. Sh; Enblom, Roger; Berg, Mats.

In: Civil-Comp Proceedings, Vol. 104, 266, 2014.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A fast non-elliptic contact model for application to rail vehicle dynamics simulation

AU - Sichani, M. Sh

AU - Enblom, Roger

AU - Berg, Mats

N1 - No full text in Eprints. HN 21/11/2017

PY - 2014

Y1 - 2014

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AB - 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 and the results are evaluated using the rigorous solution of Kalker's CONTACT code. The comparison clearly shows the new model to be more accurate than Kik-Piotrowski's in terms of contact patch and stress distribution as well as creep force estimation.

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