Technical Reports

Review and Summary of Computer Programs for Railway Vehicle Dynamics

  • 01
  • Feb
  • 1981
AUTHOR: Walter D. Pilkey
OFFICE: RPD
REPORT NUMBER: FRA/OR&D-81/17
SUBJECT: Track/Train Interactions
KEYWORDS: Wheel/Rail Contact, Lateral Stability, Curving Dynamics, Computer Models
ABSTRACT: To assess the state of development of computer programs which apply to the dynamics of rail vehicles, reviews were prepared of programs in six different categories: lateral stability, curving dynamics, wheel/rail contact, freight vehicle dynamics, analog hybrid simulation, and train dynamics. In addition, a number of European programs were summarized. A survey of users of the programs was also undertaken. The great majority of available programs are not widely used; some were developed for specific purposes and are not suitable for general use. The three programs which are most frequently applied are Train Operations Simulator (TOS), Quasi-Static Lateral Stability Model (QSLTS), and Nonlinear Flexible Car Body Vehicle Model (FVEH). These codes appear to be the best choices for further improvement and verification. Other areas in which users believe computer programs could be profitably employed are wear, fatigue, fracture, inelastic behavior, and impact. The principal drawback in applying existing codes seems to be the difficulty in obtaining accurate input data, such as damping constants, moments of inertia, stiffnesses, and locations of mass centers.

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