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Simulation of Wheel and Rail Profile Evolution: Wear Modelling and Validation
KTH, Tidigare Institutioner                               , Farkost- och flygteknik.ORCID-id: 0000-0002-3447-6686
2004 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Numerical procedures for reliable wheel and rail wearprediction are rare. Recent development of simulationtechniques and computer power together with tribologicalknowledge do however suggest computer aided wear prediction.The objective of the related research field at the RoyalInstitute of Technology (KTH) is to arrive at a numericalprocedure able to simulate profile evolution due to uniformwear to a degree of accuracy sufficient for application tovehicle dynamics simulation. Such a tool would be useful formaintenance planning as well as optimisation of the transportsystem and its components.

The research contribution accounted for in this thesisincludes, in addition to a literature review, refinement ofmethods applied to uniform wheel wear simulation by inclusionof braking and improvement of the contact model. Further atentative application to uniform rail wheel simulation has beenproposed and tested.

The first part addresses issues related to braking andwheel-rail contact conditions in the context of wheel wearsimulation. The KTH approach includes Archard’s wear modelwith associated wear maps, vehicle dynamics simulation andrailway network definition. In previous work at KTH certainvariations in operating conditions have been accounted forthrough empirically estimated average scaling factors. Theobjective of the current research is to be able to include suchvariations in the set of simulations. In particular theinfluence of disc braking and varying friction and lubricationconditions are investigated. Both environmental factors likemoist and contamination and deliberate lubrication need to beconsidered. As part of the associated contact analysis theinfluence of tangential elastic deformation of the contactingsurfaces on the sliding velocity has been separatelyinvestigated and found to be essential in case of partial slipcontact conditions.

In the second part validation of the improvements related towheel wear simulation is addressed. Disc braking has beenincluded in the simulation set and a wear map for moist contactconditions based on recent tribometer tests has been draftedand tested. It has been shown that the previously used brakingfactor accounts for the combination of the contributions fromsurface elasticity and braking. Good agreement withmeasurements from the Stockholm commuter service is achieved.It is concluded that the model improvements accounted for aresufficient for adequate simulation of tread wear but thatfurther development of the flange / gauge corner contactmodelling may be needed.

In the final part a procedure for simulation of rail wearand corresponding profile evolution has been formulated. Asimulation set is selected defining the vehicles running on thetrack to be investigated, their operating conditions, andcontact parameters. Several variations of input data may beincluded together with the corresponding occurrenceprobability. Trial calculations of four non-lubricated curveswith radii from 303 m to 802 m show qualitatively reasonableresults in terms of profile shape development and difference inwear mechanisms between gauge corner and rail head. The wearrates related to traffic tonnage are however overestimated. Itis believed that model refinements in terms of environmentalinfluence and contact stress calculation are useful to improvethe quantitative results.

sted, utgiver, år, opplag, sider
Stockholm: KTH , 2004. , s. x, 32
Serie
Trita-AVE, ISSN 1651-7660 ; 2004:19
Emneord [en]
contact, wear, wear prediction, wear model, wheel profile, rail profile, simulation vehicle-track interaction, multibody simulation, MBS
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-1754ISBN: 91-7283-806-X (tryckt)OAI: oai:DiVA.org:kth-1754DiVA, id: diva2:7737
Presentation
(engelsk)
Merknad
QC 20100531Tilgjengelig fra: 2004-06-30 Laget: 2004-06-30 Sist oppdatert: 2010-05-31bibliografisk kontrollert
Delarbeid
1. Simulation of railway wheel profile development due to wear: influence of disc braking and contact environment
Åpne denne publikasjonen i ny fane eller vindu >>Simulation of railway wheel profile development due to wear: influence of disc braking and contact environment
2005 (engelsk)Inngår i: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 258, nr 7-8, s. 1055-1063Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This paper addresses issues related to braking and wheel-rail contact conditions in the context of wheel wear simulation. The KTH approach to the topic includes Archard's wear model with associated wear maps, vehicle dynamics simulation and railway network definition. In previous work at KTH certain variations in operating conditions have been accounted for through empirically estimated average scaling factors. The objective of the current research is to be able to include such variations in the set of simulations. In particular the influence of disc braking as well as varying friction and lubrication conditions are investigated. Both environmental factors like moist and contamination and deliberate lubrication need to be considered. As part of the associated contact analysis the influence of local elastic deformation on the sliding velocity has been separately investigated.

sted, utgiver, år, opplag, sider
Elsevier, 2005
Emneord
railway wheel wear, wheel profile, simulation, disc braking
HSV kategori
Forskningsprogram
Järnvägsgruppen - Fordonsteknik
Identifikatorer
urn:nbn:se:kth:diva-6415 (URN)10.1016/j.wear.2004.03.055 (DOI)000227273800013 ()2-s2.0-13844269270 (Scopus ID)
Merknad

QC 20100531. 6th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems. GOTHENBURG, SWEDEN. JUN 10-13, 2003

Tilgjengelig fra: 2006-11-22 Laget: 2006-11-22 Sist oppdatert: 2017-12-14bibliografisk kontrollert
2. Wheel Wear Modelling Including Disc Braking and Contact Environment: Simulation of 18 Months of Commuter Service in Stockholm
Åpne denne publikasjonen i ny fane eller vindu >>Wheel Wear Modelling Including Disc Braking and Contact Environment: Simulation of 18 Months of Commuter Service in Stockholm
2004 (engelsk)Inngår i: Proceedings of the 14th International Wheelset Congress, 2004Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

This paper addresses some aspects of modelling and validation of wheel wear simulation. In previous work at KTH the influences of braking and lubrication have been accounted for through empirically estimated average scaling factors. The current research shows how to include those effects in the set of simulations instead. Disc braking has been included in the simulation set and a wear map for moist contact conditions based on recent tribometer tests has been drafted and tested. Good agreement with measurements from theStockholmcommuter service is achieved. It is concluded that the model improvements accounted for are sufficient for adequate simulation of tread wear but that further development of the flange / gauge corner contact modelling is needed.

HSV kategori
Forskningsprogram
Järnvägsgruppen - Fordonsteknik
Identifikatorer
urn:nbn:se:kth:diva-13144 (URN)
Eksternt samarbeid:
Konferanse
14th International Wheelset Congress, Orlando, October 17-22, 2004
Merknad

QC 20100531

Tilgjengelig fra: 2010-05-31 Laget: 2010-05-31 Sist oppdatert: 2016-09-02bibliografisk kontrollert
3. Tentative Formulation of Simulation of Rail Profile Evolution due to Uniform Wear
Åpne denne publikasjonen i ny fane eller vindu >>Tentative Formulation of Simulation of Rail Profile Evolution due to Uniform Wear
(engelsk)Artikkel i tidsskrift (Annet vitenskapelig) Submitted
HSV kategori
Forskningsprogram
Järnvägsgruppen - Fordonsteknik
Identifikatorer
urn:nbn:se:kth:diva-13146 (URN)
Merknad
QS 20120326Tilgjengelig fra: 2010-05-31 Laget: 2010-05-31 Sist oppdatert: 2012-03-26bibliografisk kontrollert

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