Non-linearity of non-steady rolling contact mechanics under the half-space assumption

L. Ren, G. Xie, S. D. Iwnicki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This paper presents an investigation into the non-steady rolling contact mechanics within the context of railway wheel-rail contact. The focus is on the relationship between the creep force and non-steady parameters, and the purpose is to examine whether a linear system exists for these non-steady cases. The non-steady contact parameters under investigation are contact geometry, normal force, and creepage. Both the normal and tangential contact problems were solved using previously developed time-domain models based on Kalker's [Three-Dimensional Elastic Bodies in Rolling Contact, Kluwer Academic Publishers, Dordrecht, The Netherlands, 1990] numerical theory for half-space contact with prescribed, mainly sinusoidal, load histories. The resultant creep forces were then analysed with a system identification method in order to find a possible transfer function to provide linear representations of the non-steady contact behaviour. It was found that although linear models can be identified in some cases, a general, simple linear model cannot be realised in practice and the non-steady rolling contact mechanics is generally non-linear. 
Original languageEnglish
Pages (from-to)1771-1790
Number of pages20
JournalVehicle System Dynamics
Volume49
Issue number11
Early online date24 Jun 2011
DOIs
Publication statusPublished - Nov 2011
Externally publishedYes

Fingerprint

Mechanics
Creep
Transfer functions
Linear systems
Rails
Identification (control systems)
Wheels
Geometry

Cite this

@article{2ab82c345b2942879b6d609c9a625704,
title = "Non-linearity of non-steady rolling contact mechanics under the half-space assumption",
abstract = "This paper presents an investigation into the non-steady rolling contact mechanics within the context of railway wheel-rail contact. The focus is on the relationship between the creep force and non-steady parameters, and the purpose is to examine whether a linear system exists for these non-steady cases. The non-steady contact parameters under investigation are contact geometry, normal force, and creepage. Both the normal and tangential contact problems were solved using previously developed time-domain models based on Kalker's [Three-Dimensional Elastic Bodies in Rolling Contact, Kluwer Academic Publishers, Dordrecht, The Netherlands, 1990] numerical theory for half-space contact with prescribed, mainly sinusoidal, load histories. The resultant creep forces were then analysed with a system identification method in order to find a possible transfer function to provide linear representations of the non-steady contact behaviour. It was found that although linear models can be identified in some cases, a general, simple linear model cannot be realised in practice and the non-steady rolling contact mechanics is generally non-linear. ",
keywords = "corrugation, creep force, non-linearity, non-steady rolling contact",
author = "L. Ren and G. Xie and Iwnicki, {S. D.}",
year = "2011",
month = "11",
doi = "10.1080/00423114.2010.539238",
language = "English",
volume = "49",
pages = "1771--1790",
journal = "Vehicle System Dynamics",
issn = "0042-3114",
publisher = "Taylor and Francis Ltd.",
number = "11",

}

Non-linearity of non-steady rolling contact mechanics under the half-space assumption. / Ren, L.; Xie, G.; Iwnicki, S. D.

In: Vehicle System Dynamics, Vol. 49, No. 11, 11.2011, p. 1771-1790.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Non-linearity of non-steady rolling contact mechanics under the half-space assumption

AU - Ren, L.

AU - Xie, G.

AU - Iwnicki, S. D.

PY - 2011/11

Y1 - 2011/11

N2 - This paper presents an investigation into the non-steady rolling contact mechanics within the context of railway wheel-rail contact. The focus is on the relationship between the creep force and non-steady parameters, and the purpose is to examine whether a linear system exists for these non-steady cases. The non-steady contact parameters under investigation are contact geometry, normal force, and creepage. Both the normal and tangential contact problems were solved using previously developed time-domain models based on Kalker's [Three-Dimensional Elastic Bodies in Rolling Contact, Kluwer Academic Publishers, Dordrecht, The Netherlands, 1990] numerical theory for half-space contact with prescribed, mainly sinusoidal, load histories. The resultant creep forces were then analysed with a system identification method in order to find a possible transfer function to provide linear representations of the non-steady contact behaviour. It was found that although linear models can be identified in some cases, a general, simple linear model cannot be realised in practice and the non-steady rolling contact mechanics is generally non-linear. 

AB - This paper presents an investigation into the non-steady rolling contact mechanics within the context of railway wheel-rail contact. The focus is on the relationship between the creep force and non-steady parameters, and the purpose is to examine whether a linear system exists for these non-steady cases. The non-steady contact parameters under investigation are contact geometry, normal force, and creepage. Both the normal and tangential contact problems were solved using previously developed time-domain models based on Kalker's [Three-Dimensional Elastic Bodies in Rolling Contact, Kluwer Academic Publishers, Dordrecht, The Netherlands, 1990] numerical theory for half-space contact with prescribed, mainly sinusoidal, load histories. The resultant creep forces were then analysed with a system identification method in order to find a possible transfer function to provide linear representations of the non-steady contact behaviour. It was found that although linear models can be identified in some cases, a general, simple linear model cannot be realised in practice and the non-steady rolling contact mechanics is generally non-linear. 

KW - corrugation

KW - creep force

KW - non-linearity

KW - non-steady rolling contact

UR - http://www.scopus.com/inward/record.url?scp=80053517245&partnerID=8YFLogxK

U2 - 10.1080/00423114.2010.539238

DO - 10.1080/00423114.2010.539238

M3 - Article

VL - 49

SP - 1771

EP - 1790

JO - Vehicle System Dynamics

JF - Vehicle System Dynamics

SN - 0042-3114

IS - 11

ER -