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VSS Demonstration Program Part 1: System Performance Evaluation

The Vertical Shaker System (VSS) is the initial test program to be conducted at the Rail Dynamics Laboratory. The Objectives of this program are to demonstrate the performance and capabilities of the VSS and to accumulate test data to be used in checking the validity of analytical models. The...

Validation of FRATE, Freight Car Response Analysis and Test Evaluation

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...

Users' Manual for Kalker's "Exact" Nonlinear Creep Theory

The conversion of the computer program, "A Programme for Three-Dimensional Steady State Rolling" developed by Professor J. J. Kalker, from the original Algol language to FORTRAN is considered. This program determines the resultant creep forces and moment for steady state rolling of two bodies of...

Ultrasonic Pulse Propagation in the Cold-Worked Layer of Railroad Rail

Ultrasonic pulses propagating along the rolling surface of used railroad rail were observed to have two distinct arrivals. One arrival corresponded to the expected Rayleigh wave. The other, travelling just ahead of the Rayleigh wave, could not be identified as either a pure shear or dilatational...