Full Content is available to subscribers

Subscribe/Learn More  >

Mathematical Simulation of Air Suspension Failure and Derailment

[+] Author Affiliations
Patricia Schreiber, Nicholas Wilson

Transportation Technology Center, Inc., Pueblo, CO

Paper No. RTDF2010-42016, pp. 79-90; 12 pages
  • ASME 2010 Rail Transportation Division Fall Technical Conference
  • ASME 2010 Rail Transportation Division Fall Technical Conference
  • Roanoke, Virginia, USA, October 12–13, 2010
  • Conference Sponsors: Rail Transportation Division
  • ISBN: 978-0-7918-4406-9 | eISBN: 978-0-7918-3889-1
  • Copyright © 2010 by ASME


Air suspensions are a commonly used component of modern transit and passenger vehicle suspensions. New vehicle performance specifications usually require testing and analyses with the air suspension inflated and also deflated. However, the tests and analyses usually do not include the dynamic effects that may occur at the instant of deflation. Transportation Technology Center, Inc. (TTCI) recently investigated a revenue service flange climb derailment for a large North American transit system. The derailment occurred on the diverging route of a No. 10 turnout. Initial investigation by the transit system did not identify any track or equipment that showed significant deviations from their normal practices; no obvious cause for the derailment was identified, although the air suspension had been deflated after the derailment. To assist in determining potential contributing factors for the derailment, TTCI conducted NUCARS® simulations of the car negotiating the turnout, using these parameters: • Vehicle dynamic response to local track geometry conditions, including motions of the air suspension; • Sudden deflation of the air suspension; • Wheel and rail profiles. This paper presents the methods used to represent sudden component failures in the NUCARS simulations, including the air suspension deflation. The simulation results show how the sudden deflation of the air suspension combined with local track geometry and wheel/rail contact conditions could contribute to a flange climb derailment.

Copyright © 2010 by ASME
Topics: Simulation , Failure



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In