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The influence of surface roughness on the contact stiffness and the contact filter effect in nonlinear wheel-track interaction
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0002-2683-1553
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design. Eindhoven Univ Technol, Netherlands.ORCID iD: 0000-0002-3609-3005
2016 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 366, 429-446 p.Article in journal (Refereed) PublishedText
Abstract [en]

A state-dependent contact model including nonlinear contact stiffness and nonlinear contact filtering is used to calculate contact forces and rail vibrations with a time-domain wheel-track interaction model. In the proposed method, the full three-dimensional contact geometry is reduced to a point contact in order to lower the computational cost and to reduce the amount of required input roughness-data. Green's functions including the linear dynamics of the wheel and the track are coupled with a point contact model, leading to a numerically efficient model for the wheel-track interaction. Nonlinear effects due to the shape and roughness of the wheel and the rail surfaces are included in the point contact model by pre-calculation of functions for the contact stiffness and contact filters. Numerical results are compared to field measurements of rail vibrations for passenger trains running at 200 kph on a ballast track. Moreover, the influence of vehicle pre-load and different degrees of roughness excitation on the resulting wheel-track interaction is studied by means of numerical predictions.

Place, publisher, year, edition, pages
Academic Press, 2016. Vol. 366, 429-446 p.
Keyword [en]
Wheel-rail contact, Rolling noise excitation, Roughness, Surface topography, Contact filter effect, Contact stiffness
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-182140DOI: 10.1016/j.jsv.2015.12.026ISI: 000368560800023ScopusID: 2-s2.0-84957430254OAI: oai:DiVA.org:kth-182140DiVA: diva2:904975
Note

QC 20160220

Available from: 2016-02-20 Created: 2016-02-16 Last updated: 2016-02-20Bibliographically approved

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Lundberg, Oskar E.Arteaga, Ines Lopez
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Marcus Wallenberg Laboratory MWLVinnExcellence Center for ECO2 Vehicle design
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