Other Reports

Validation of FRATE, Freight Car Response Analysis and Test Evaluation

  • 01
  • Dec
  • 1978
AUTHOR: George Kachadourian, Nathan E. Sussman
SUBJECT: Evaluation
KEYWORDS: TOFC, Computer Program, Rail Dynamics
ABSTRACT: A nonlinear computer program for Freight Car Response Analysis and Test Evaluation (FRATE) has been developed under the sponsorship of the Federal Railroad Administration. This computer program incorporates a model of a Trailer on Flatcar (TOFC) configuration. Validation of the FRATE/TOFC program is accomplished through comparison of analysis results to the results of vibration tests performed on a TOFC configuration at the Rail Dynamics Laboratory in Pueblo, Colorado. Validation criteria include resonant frequencies, deflection shape at resonance and amplification of input motions. This paper presents a brief review of the FRATE/TOFC computer program, a summary of TOFC vibration test results and comparisons of test and analysis results. Procedures followed to achieve acceptable agreement between test and analysis are reviewed. Pre-and Post-validation versions of FRATE/TOFC are presented. Limitations of the validated program are reviewed.
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