Technical Reports

Stub Sill Tank Car Research Project: Full-Scale Damage Tolerance Test

In 1992, the National Transportation Safety Board recommended that tank car structures be designed using a damage-tolerant philosophy similar to that utilized by the aircraft industry. Toward that end, the Southwest Research Institute was engaged to assist in the development and implementation of a...

The Application of Quasi-Linearization Techniques to Rail Vehicle Dynamic Analyses

The objective of the work reported here was to define methods for applying the describing function technique to realistic models of nonlinear rail cars. The describing function method offers a compromise between the accuracy of nonlinear digital simulation and the computational efficiency of...

Steady State Curving and Wheel/Rail Wear Properties of a Transit Vehicle on the Tight Turn Loop

This report describes the results of a test series carried out on the Tight Turn Loop at the Transportation Test Center to assess the curving and wheel/rail wear performance of a transit vehicle negotiating a very tight turn. Tests were performed on unlubricated rail to ensure constant coefficients...

Development and Deployment of a Vehicle Tracking System at the Transportation Technology Center

A vehicle tracking system (VTS) was installed and deployed at the Federal Railroad Administration's Transportation Technology Center (TTC) in November 2002. The fundamental goal of this program was to enhance the already high level of safety for TTC personnel in a spread out field test environment...

Roll Dynamics Unit Dynamometer Evaluation Test Using a GP4-02 Locomotive

This report describes evaluative testing of the Roll Dynamics Unit (RDU) at the Transportation Test Center near Pueblo, Colorado. Previous uses of the RDU had been limited to short braking tests, truck stability tests and the transient absorption of power from a transit car. The Dynamometer tests...

Review of Available Vehicle Tracking Systems for Use at the Transportation Technology Center

Transportation Technology Center, Inc. (TTCI), a subsidiary of the Association of American Railroads (AAR), performed a review of currently available Vehicle Tracking System (VTS) technologies and their applicability to operations at the Federal Railroad Administration's Transportation Technology...

Review and Evaluation of Track Designs for Joint High Speed Rail and Heavy Freight Operations

An increasing number of railway track segments in the U. S. will soon be required to carry both high-speed passenger and heavy freight traffic. In some cases, conventional track structures (i.e., ballasted crosstie tracks) may not be adequate for both types of service. They may not be capable of...

Recommended Practices for Rail Transit Intra-System Electromagnetic Compatibility of Vehicular Electrical Power and Track Circuit Signaling Subsystems : Volume I: Inductive Recommended Practices

Methods for detecting and quantifying the levels of inductive electromagnetic interference produced by solid state rapid transit propulsion equipment and the susceptibility of audio-frequency signaling systems to these emissions are presented. These methods include procedures for taking...

Rapid Transit Noise Abatement and Cost Requirements (MBTA Pilot Study)

A methodology is described, based on a study conducted on the Massachusetts Bay Transit Authority Blue, Red and Orange Lines, to assess the acoustic noise climate of an urban rail transit system and the appropriate technology to cost - effectively reduce that climate to acceptable levels. The...

Railroad Electromagnetic Compatibility: Locomotive- Volume III : Summary of AEM-7 Electromagnetic Emission Measurements

Results of electromagnetic emission measurements performed on an AEM-7 at the Transportation Test Center near Pueblo, Colorado, are presented. A brief description of teh measurements and methodology employed is included.

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Technical Reports