Technical Reports

An Analytical and Experimental Determination of Nonlinear Wheel/Rail Geometric Constraints

  • 30
  • Dec
  • 1975
AUTHOR: N.K. Cooperrider, E.H. Law, R. Hull, P.S. Kadala, J.M. Tuten
OFFICE: RPD
REPORT NUMBER: FRA-OR&D 76-244
SUBJECT: Track/Train Interactions
KEYWORDS: Wheel/Rail kinematics, Wheel/rail geometry, wheelset
ABSTRACT: Wheel/rail geometric constraint relationships, such as the effective conicity and gravitational stiffness, strongly influence the lateral dynamics of railway vehicles. In general, these geometric constraints are nonlinear functions of the wheelset lateral displacement. This report describes the development and validation of an analytical procedure to determine these nonlinear functions for arbitrary wheel and rail profiles. Data for validation of this analysis was obtained experimentally. Experimental and analytical data for three validation cases is presented. Results of a limited parametric study are also reported. The computer program for the analytical procedure is described and documented.

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