Technical Reports

Results of Laboratory Quasi-Static Jacking Tests on Three Vehicles

  • 01
  • Aug
  • 1998
AUTHOR: Huimin Wu
SUBJECT: Facilities & Test Equipment
KEYWORDS: Cross Level Difference, Torsional Stiffness, Twisted Track
ABSTRACT: Laboratory quasi-static jacking tests were performed on three vehicles at the Transportation Technology Center, Pueblo, Colorado. Results indicate vehicle wheel unloading that occurred during the tests varied with cross level difference, car body torsional stiffness, truck spacing, and vehicle weight. Transportation Technology Center, Inc., a subsidiary of the Association of American Railroads, conducted the tests in conjunction with the Volpe National Transportation Systems Center (VNTSC). Tests results show that unloaded vehicles with torsionally stiff bodies are more likely to experience a high percentage of wheel unloading on twisted track. This working paper is a supplement to Federal Railroad Administration report “Effect of Track Twist on Vehicle Dynamic Performance” (to be published).