Overturning and Equilibrium Speeds and Speed Safety Margin—A Sensitivity Analysis

[+] Author and Article Information
Sudhir Kumar, D. L. Prasanna Rao

Railroad Engineering Laboratory, Illinois Institute of Technology, Chicago, Ill. 60616

J. Eng. Ind 107(4), 399-401 (Nov 01, 1985) (3 pages) doi:10.1115/1.3186017 History: Received April 16, 1985; Online July 30, 2009


Two critical speeds viz., the equilibrium speed and the overturning speed, are recognized to play an important role in defining operational and safety characteristics of railroads. An analysis of the sensitivity of the critical speeds to important operating parameters is presented. Two parameters called the ‘Speed Safety Margin’ and the ‘Speed Factor’ are defined to assist in evaluating the severity of a set of operating conditions. It is concluded that degree of curve has the most drastic effect on safety followed, in decreasing order of effect, by height of CG, superelevation, and track gage. Some comments are offered as a possible guide to safe and economical operation of railroads.

Copyright © 1985 by ASME
Your Session has timed out. Please sign back in to continue.





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 Journal Articles
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