Technical Reports

A Comparison of Model and Field Test Dynamic Performance Data for a Two-Axle Freight Car

  • 01
  • Jan
  • 1989
AUTHOR: D. N. Wormley, J. R. Bailey
SUBJECT: Evaluation
KEYWORDS: Rail Vehicle Dynamics, Rail Vehicle Safety, Comparison
ABSTRACT: A microcomputer based simulation has been developed for predicting the safety related dynamic performance of rail cars. The simulation has been implemented specifically for a two-axle rail vehicle. Model data for test scenarios prescribed by the Association of American Railroads' (AAR) Chapter XI requirements have been compared with experimental test data obtained for the vehicle in hunting, steady-state curving vertically perturbed track, laterally perturbed track, and dynamic curving, tests. The simulation model and test data are in excellent agreement for vehicle response to vertical track perturbations. In the response to lateral perturbations and in curving, the general trends of the model and test data are similar. The test and model data are in good agreement in identification of operating conditions approaching safety limits.