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Friction-Slip Curves - The Pathway From Twin-Disc Tribo Measurements To Full-Scale Locomotive Multibody Simulations
Cent Queensland Univ, Ctr Railway Engn, Rockhampton, Qld, Australia..
Cent Queensland Univ, Ctr Railway Engn, Rockhampton, Qld, Australia..
KTH, School of Engineering Sciences (SCI), Centres, The KTH Railway Group. KTH, School of Engineering Sciences (SCI), Engineering Mechanics.ORCID iD: 0000-0002-8237-5847
Politecnico Torino, Dept Mech & Aerosp Engn, Turin, Italy..
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2022 (English)In: PROCEEDINGS OF 2022 JOINT RAIL CONFERENCE (JRC2022), AMER SOC MECHANICAL ENGINEERS , 2022, article id V001T07A005Conference paper, Published paper (Refereed)
Abstract [en]

Locomotive multibody simulations are commonly used as a cost-effective tool to study, energy efficiency, wheel-rail wear, rolling contact fatigue, etc. The accuracy of the wheel-rail contact forces from multibody simulations depends on the correct modelling of the friction conditions. The friction coefficient is a function of the slip velocity, and it is influenced by several tribological parameters including, for example, material mechanical properties, environmental conditions and the presence of third body layers that vary spatially and temporally along the track. In most cases, generic friction-slip curves obtained from publications and public reports are used as inputs to the wheel-rail contact model in the locomotive simulations, as direct friction measurements using full-scale experimental set-ups are generally cost-prohibitive. A pathway to produce friction-slip curves from tribo-machine friction measurements is proposed in this paper. The pathway involves manufacturing discs from actual wheel and rail material samples to measure the traction coefficient at a spectrum of slip set points using a twin-disc tribo-machine. The tribo-machine results are scaled to be used in a locomotive multibody model that uses the modified Fastsim and a traction system co-simulation approach. Two friction curves for wet and dry conditions are processed and exemplified in a dynamic model.

Place, publisher, year, edition, pages
AMER SOC MECHANICAL ENGINEERS , 2022. article id V001T07A005
Keywords [en]
Friction, slip, tribo-machine, scale experiment, locomotive, traction, multibody model, numerical analysis, modified Fastsim
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-325256DOI: 10.1115/JRC2022-84111ISI: 000949318600029Scopus ID: 2-s2.0-85134306256OAI: oai:DiVA.org:kth-325256DiVA, id: diva2:1748698
Conference
Joint Rail Conference (JRC) on Kicking Off the Next 100 Years of Rail Innovation, APR 20-21, 2022, ELECTR NETWORK
Note

QC 20230404

Available from: 2023-04-04 Created: 2023-04-04 Last updated: 2023-06-08Bibliographically approved

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Stichel, Sebastian

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