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On the generation of enhanced lookup tables for wheel-rail contact models

2019-09-15Journal article Restricted access
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dc.contributor.authorMarques, Filipe
dc.contributor.authorMagalhães, Hugo
dc.contributor.authorLiu, Binbin
dc.contributor.authorPombo, João
dc.contributor.authorFlores, Paulo
dc.contributor.authorAmbrosio, Jorge
dc.contributor.authorPiotrowski, Jerzy
dc.contributor.authorBruni, Stefano
dc.date.accessioned2019-09-09T08:39:14Z
dc.date.available2019-09-09T08:39:14Z
dc.date.issued2019-09-15
dc.description.abstractIn railway dynamics, the interpolation of lookup tables (LUTs) is a procedure utilized to reduce the computational effort when computing the wheel-rail contact forces. However, the generation of LUTs with multiple inputs and multiple outputs is a challenging task for which aspects such as their minimal size and uniform accuracy over the LUT domain have not been systematically addressed in the literature. Thus, this work presents a comprehensive methodology for a detailed analysis of general LUTs, and identifies ways to improve them. For that, an analysis of the variation of the input parameters is made and the interpolation error is assessed on the cells and edges of the original table, then, based on this analysis, two enhanced LUTs are proposed. The first one is approximately 5 times smaller than the original but holds similar accuracy. The second table exhibits half of the maximum interpolation error of the original LUT but holds an identical size. The methodology is demonstrated here using the recently published Kalker Book of Tables for Non-Hertzian contact (KBTNH) but it can be used by any other LUT approach in order to improve accuracy and/or to reduce size.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMARQUES, Filipe; [et al] – On the generation of enhanced lookup tables for wheel-rail contact models. Wear. ISSN 0043-1648. Vols. 434-435 (2019), pp. 1-13pt_PT
dc.identifier.doihttps://doi.org/10.1016/j.wear.2019.202993pt_PT
dc.identifier.issn0043-1648
dc.identifier.urihttp://hdl.handle.net/10400.21/10480
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPD/BD/114154/2016 - FCTpt_PT
dc.relationDevelopment of Advanced Multidisciplinary Methods for Railway Dynamics Applications
dc.relationUID/EMS/50022/2019 - IDMEC, under LAETApt_PT
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dc.subjectWheel-rail contactpt_PT
dc.subjectLookup tablespt_PT
dc.subjectAccuracypt_PT
dc.subjectEfficiencypt_PT
dc.subjectNon-hertzian contactpt_PT
dc.titleOn the generation of enhanced lookup tables for wheel-rail contact modelspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleDevelopment of Advanced Multidisciplinary Methods for Railway Dynamics Applications
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F96695%2F2013/PT
oaire.citation.endPage13pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleWearpt_PT
oaire.citation.volume434-435pt_PT
person.familyNameMarques
person.familyNameMagalhães
person.familyNamePombo
person.familyNameFlores
person.familyNameAmbrosio
person.givenNameFilipe
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person.givenNameJoão
person.givenNamePaulo
person.givenNameJorge
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person.identifier.orcid0000-0001-6681-5657
person.identifier.ridI-8895-2016
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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