Technical Reports

Safety Aspects of New Trucks and Lightweight Cars, Car 2

  • 01
  • Mar
  • 1991
AUTHOR: Nicholas G. Wilson
REPORT NUMBER:
SUBJECT: Evaluation
KEYWORDS: Mini-Shaker Unit, Vehicle Dynamics, Suspension Characterization, Truck Characterization, Lightweight Cars, NUCARS, AAR Chapter XI tests
ABSTRACT: The Federal Railroad Administration (FRA) has sponsored a program to continue the validation of new techniques for testing and analysis that could be applied to the evaluation of the safety and track worthiness aspects of new freight car and suspension designs. The total program involves laboratory and on-track testing, and simulation of tests using a computer model. In partnership with the FRA, the Association of American Railroads (AAR) funded the development and first tests of a new suspension characterization facility for performing the laboratory tests. This report documents the results of the laboratory tests and the preliminary computer modeling performed prior to the on-track tests. The laboratory tests consisted of performing the suspension characterizations using the newly developed facility. The test results were used as input to a computer model of the test vehicle. The computer model was used to predict, prior to the on-track tests, the dynamic behavior of the test vehicle. Simulations were run for all the track test sections required by AAR Specification M-1001, Chapter XI. The vehicle was simulated in both empty and loaded condition.

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