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Descripción
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| Somehigh-speedraillinesgothroughdesertzoneswheresandparticlestransportedbywindsmayfoultrackballastlayers.Thisfoulingcanbetroublesomesinceitincreasesthestiffnessofthelayerandreducesitscapacitytoabsorbvibrationsfromtherollingstock.Wearestudyingthisphenomenonthroughbothlaboratoryandnumericalexperiments.Inthelaboratory,weperformedtwokindsofexperiments:9inchestriaxialtestsandphysicalmodellingintheCEDEXTrackBoxtestingfacility.Thelatterisaunique1:1modelofrailwaytracksection(ofdimensions21m×5m×4m)thathasbeenbuilttomodelhigh-speedraillines(withpassengerandfreighttrainspassingatvelocitiesofupto400km/h).Thelaboratoryexperimentsallowedustomeasurethechangeofstiffnesswiththefoulinglevel(representedthroughthevoidcontaminantindex,VCI).NumericalsimulationsarebeingperformedwiththeDiscreteElementMethod,reproducingdrainedtriaxialtestconditions.Duetotheconsiderabledifferentsizeofrailwayballastandsandgrains,weareusingidealizedpackingsofsphericalparticlestostudythisphenomenon.WearepayingparticularattentiontothesamplesizeeffectsandareregisteringtheevolutionofthestiffnesswiththefoulingleveluptohighvalueofVCI.Theresultsobtainedfromtheseidealizedsystemswillbecontrastedtothelaboratoryexperimentscarriedoutwithrealrailwayballastandsand. | |
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Internacional
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Si |
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Nombre congreso
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VI International Conferenceon Particle-based Methods?Fundamental sand Applications PARTICLES 2019 |
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Tipo de participación
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960 |
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Lugar del congreso
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Barcelona |
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Revisores
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Si |
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ISBN o ISSN
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978-84-121101-1-1 |
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DOI
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Fecha inicio congreso
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28/10/2019 |
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Fecha fin congreso
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30/10/2019 |
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Desde la página
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250 |
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Hasta la página
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259 |
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Título de las actas
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Proceedings of the VI International Conference on Particle-Based Methods - Fundamentals and Applications |