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    Stochastic Analysis of the Wheel-Rail Contact Friction Using the Polynomial Chaos Theory

    Source: Journal of Tribology:;2012:;volume( 134 ):;issue: 003::page 31601
    Author:
    HyunWook Lee
    ,
    Corina Sandu
    ,
    Carvel Holton
    DOI: 10.1115/1.4004877
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The coefficient of friction (CoF) is a very important factor for designing, operating, and maintaining the wheel-rail system. In the real world, accurate estimation of the CoF at the wheel-rail interface is difficult due to the effects of various uncertain parameters, e.g., wheel and rail materials, rail roughness, contact patch size, and so on. In this study, a stochastic analysis using polynomial chaos (poly-chaos) theory is performed with the newly developed 3D dry CoF model at the wheel-rail contact. The wheel-rail system is modeled as a mass-spring-damper system. Stochastic analyses with one uncertainty, combinations of two uncertainties, and a combination of three uncertainties are performed. The probability density function (PDF) results for stick CoF, slip CoF, and combined (total) CoF are presented. The stochastic analysis results show that the total CoF PDF before 1 s is dominantly affected by the stick phenomenon, whereas the slip dominantly influences the total CoF PDF after 1 s. The CoF PDFs obtained from simulations with combinations of two and three uncertain parameters have wider PDF ranges than those obtained for only one uncertain parameter. The current work demonstrates that the CoF is strongly affected by the stochastic variation of dynamic parameters. Thus, the PDF distribution of the CoF could play a very important role in the design of the wheel-rail system.
    keyword(s): Rails , Wheels , Friction , Polynomials , Displacement , Design , Surface roughness AND Chaos ,
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      Stochastic Analysis of the Wheel-Rail Contact Friction Using the Polynomial Chaos Theory

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    contributor authorHyunWook Lee
    contributor authorCorina Sandu
    contributor authorCarvel Holton
    date accessioned2017-05-09T00:54:39Z
    date available2017-05-09T00:54:39Z
    date copyrightJuly, 2012
    date issued2012
    identifier issn0742-4787
    identifier otherJOTRE9-28794#031601_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/150332
    description abstractThe coefficient of friction (CoF) is a very important factor for designing, operating, and maintaining the wheel-rail system. In the real world, accurate estimation of the CoF at the wheel-rail interface is difficult due to the effects of various uncertain parameters, e.g., wheel and rail materials, rail roughness, contact patch size, and so on. In this study, a stochastic analysis using polynomial chaos (poly-chaos) theory is performed with the newly developed 3D dry CoF model at the wheel-rail contact. The wheel-rail system is modeled as a mass-spring-damper system. Stochastic analyses with one uncertainty, combinations of two uncertainties, and a combination of three uncertainties are performed. The probability density function (PDF) results for stick CoF, slip CoF, and combined (total) CoF are presented. The stochastic analysis results show that the total CoF PDF before 1 s is dominantly affected by the stick phenomenon, whereas the slip dominantly influences the total CoF PDF after 1 s. The CoF PDFs obtained from simulations with combinations of two and three uncertain parameters have wider PDF ranges than those obtained for only one uncertain parameter. The current work demonstrates that the CoF is strongly affected by the stochastic variation of dynamic parameters. Thus, the PDF distribution of the CoF could play a very important role in the design of the wheel-rail system.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleStochastic Analysis of the Wheel-Rail Contact Friction Using the Polynomial Chaos Theory
    typeJournal Paper
    journal volume134
    journal issue3
    journal titleJournal of Tribology
    identifier doi10.1115/1.4004877
    journal fristpage31601
    identifier eissn1528-8897
    keywordsRails
    keywordsWheels
    keywordsFriction
    keywordsPolynomials
    keywordsDisplacement
    keywordsDesign
    keywordsSurface roughness AND Chaos
    treeJournal of Tribology:;2012:;volume( 134 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian