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Double Rail Model and Turnout Simulation

[+] Author Affiliations
Xinggao Shu, Nicholas Wilson, David D. Davis

Transportation Technology Center, Inc., Pueblo, CO

Paper No. RTDF2013-4731, pp. V001T01A019; 9 pages
  • ASME 2013 Rail Transportation Division Fall Technical Conference
  • ASME 2013 Rail Transportation Division Fall Technical Conference
  • Altoona, Pennsylvania, USA, October 15–17, 2013
  • Conference Sponsors: Rail Transportation Division
  • ISBN: 978-0-7918-5611-6
  • Copyright © 2013 by ASME


Transportation Technology Center, Inc., a wholly owned subsidiary of the Association of American Railroads, has developed a double rail model for special trackwork simulation in the NUCARS® vehicle/track interaction multibody dynamic simulation program. The double rail model consists of a primary rail and a secondary rail on each side of the track. it It permits one wheel to contact two rails so that the effects of their relative movements on wheel/rail contact can be investigated. It also allows rail profile and track suspension stiffness and damping to vary on the track.

This paper presents simulation results of a freight car running on a No. 20 turnout. Simulation results showed that the double rail model improved the integration stability and simulation accuracy for high frequency wheel/rail (W/R) impacts by capturing the simultaneous multiple W/R contact point situations and transitions under various discontinuous track running surface conditions.

Parametric studies of W/R impacts on frog points showed the frog point geometry designs have conflicting requirements for dynamic performance for vehicles equipped with with new wheels and hollow-worn wheels; the NUCARS double rail model provides a useful tool for frog and switch point geometry optimization.

Copyright © 2013 by ASME
Topics: Simulation , Rails



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