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Dynamic Loads on the Undercarriage of Freight Cars

A description is presented of the procedure and the equipment used to study the dynamic loads acting on the undercarriages of freight cars. The results are presented from testing the four axle and eight axle gondolas and tank cars on the primary routes of the railroad network as part of operating...

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...