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An alternative to FASTSIM for tangential solution of the wheel-rail contact
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0003-2590-3698
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-3447-6686
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-2571-4662
2016 (English)In: The Dynamics of Vehicles on Roads and Tracks - Proceedings of the 24th Symposium of the International Association for Vehicle System, CRC Press, 2016, 1377-1385 p.Conference paper, Published paper (Refereed)
Abstract [en]

In most rail vehicle dynamics simulation packages, creep forces are estimated by means of Kalker's FASTSIM algorithm. While 5%-25% error is expected for force estimation the errors of shear stress distribution, needed for wheel/rail damage analysis, may rise above 30%. This is mainly due to the use of parabolic traction bound in FASTSIM. Thus, a novel algorithm called FaStrip is proposed as an alternative to FASTSIM. It is based on the strip theory in which elliptic traction bound is used. The comparison between the two algorithms, evaluated by CONTACT, shows that using FaStrip improves the accuracy of the estimated shear stress distribution while the creep force estimation in all studied cases is significantly improved as well. In one case, for instance, the error in force estimation reduces from 18% to less than 2%. Since FaStrip is as fast as FASTSIM, it can be an alternative for tangential solution of the wheel-rail contact in simulation packages.

Place, publisher, year, edition, pages
CRC Press, 2016. 1377-1385 p.
Keyword [en]
wheel-rail contact, FASTSIM, strip theory, rolling contact, vehicle dynamics, creep curve
National Category
Other Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-196647ISI: 000385792300143Scopus ID: 2-s2.0-84973598835ISBN: 978-1-4987-7702-5 (print)ISBN: 978-1-138-02885-2 (print)OAI: oai:DiVA.org:kth-196647DiVA: diva2:1049111
Conference
24th Symposium of the International Association for Vehicle System Dynamics, IAVSD 2015, Graz, Austria, 17 August 2015 through 21 August 2015
Note

QC 20161123

Available from: 2016-11-23 Created: 2016-11-17 Last updated: 2016-11-23Bibliographically approved

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