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Effects of Independently Rolling Wheels on Flange Climb Derailment

[+] Author Affiliations
Nicholas Wilson, Xinggao Shu, Ken Kramp

Transportation Technology Center, Inc.

Paper No. IMECE2004-60293, pp. 21-27; 7 pages
doi:10.1115/IMECE2004-60293
From:
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Rail Transportation
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Rail Transportation Division
  • ISBN: 0-7918-4719-5 | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME

abstract

The effects of independently rolling wheels (IRW) on flange climb derailment have been investigated through simulations using Transportation Technology Center, Inc. (TTCI)’s *NUCARSTM dynamic modeling software. Simulations of single wheelsets and hypothetcal light rail vehicles equipped with IRWs show that flange angle and flange length parameters play an important role in preventing derailments. That role is especially critical for independent rolling wheels due to their lack of self-steering capability. The speed contour concept was proposed for engineers to adopt the flange angle and flange length in a logical way for wheel profile design in new vehicles and wheel profile maintenance. It is also shown that the sensitivity of IRW to flange climb is also very dependent on particular vehicle designs.

Copyright © 2004 by ASME
Topics: Flanges , Wheels

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