Technical Reports

Laboratory Tests of Two 100-Ton Covered Hopper Cars

  • 01
  • Dec
  • 1985
AUTHOR: George Kachadourian
SUBJECT: Safety Performance Measures
KEYWORDS: Harmonic Roll, Vibration Test Unit, VTU, Truck Properties, Safety Performance
ABSTRACT: The Federal Railroad Administration (FRA) and the Association of American Railroads (AAR) have jointly sponsored an experimental program to study the 100-ton covered hopper car with the end objective of improving its safety performance. The total program includes track and laboratory testing of two base vehicles and two prototype vehicles. This report presents the laboratory results of the two base vehicles. The laboratory tests consist of quasi static tests on each truck from both base vehicles and vibration tests of each vehicle on the Vibration Test Unit (VTU) at the Transportation Test Center (TTC) in Pueblo, Colorado. The dynamic properties of the test vehicles were measured including several configuration variations. The responses of the vehicles to simulated track conditions were measured with track conditions carried to the point of wheel lift. The objectives of the laboratory tests were to define the dynamic properties of the test vehicles and the effects of these properties on safety performance.