Technical Reports

Users' Manual for Linear Freight Car Forced Lateral Response Analysis Computer Program

  • 01
  • Dec
  • 1980
AUTHOR: Neil K. Cooperrider, E. Harry Law
OFFICE: RPD
REPORT NUMBER: FRA/ORD-80/85
SUBJECT: Evaluation
KEYWORDS: Rail Vehicle Dynamics, Modeling, Computer Simulation
ABSTRACT: This manual documents a FORTRAN IV computer program that solves for the forced lateral sinusoidal and random response of a linear, 9 degree-of freedom freight car. The vehicle model represents the lateral dynamics of typical North American freight cars equipped with three piece trucks. Responses to both roadbed center-line alignment and cross level irregularities are computed. The response is calculated using frequency domain techniques. The steady state sinusoidal transfer functions are computed, response power spectral densities obtained and R.M.S. values found by integration of the power spectra. Plots of selected output power spectra are prepared. The manual briefly describes the vehicle and roadbed model and the solution technique. The program description, a sample run and a complete program listing are included.
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