Technical Reports

Amtrak/Knorr Disc Brake Study : Volume II - Appendices A through I

This volume contains the following appendices to Volume I, Final Report: Appendix A - Wheel Condition Effects Appendix B - Effects of Cyclic Loads on Pin Wear Appendix C - Over-the-Road Test Acceleration Data from the Boston Run Appendix D - Over-the-Road Test Acceleration Data from the...

Brake System Design Optimization- Volume II: Supplemental Data

This report presents supplemental data which support Volume I, A Survey and Assessment, DOT-TSC-FRA-78-1,I,FRA/ORD-78/20,I, dated June 1978, 140 pages. A detailed description of the functional performance of each freight car air brake system component is provided. This is followed by a discussion...

Wheel Failure Mechanisms of Railroad Cars-- Final Report - Volume 1 (Summary Report)

This report summarizes an extensive research program into the causes of wheel thermal failure. Results of material property tests, review of failure data, dynamometer tests, roll dynamics unit, track tests, and theoretical and experimental stress analysis show that heat-treated wheels of designs...

Wheel Unloading of Rail Vehicles Due to Track Twist

An analysis is presented describing the effect that track twist has on the loads carried by the wheels of a rail car. Wheel unloading is determined as a function of the difference in cross level between the truck centers of the car. The different vehicle characteristics that affect a car's reaction...

Laboratory Study to Determine the Effects of Tie Pad Stiffness on the Attenuation of Impact Loads in Concrete Railway Ties

The effect of tie pad stiffness on the bending moments produced by impact loading of concrete railroad ties was investigated in laboratory tests. Controlled impact loads were applied to a one-tie test arrangement in which the pads were interchanged. Beginning with a rigid plastic pad currently in...

Maglev Cost Estimation: Annual Operating & Maintenance Cost Elements

This report describes a proposed cost estimating approach and presents annual operating & maintenance (O&M) cost factors for use in conjunction with VNTSC's Scenario Assessment Models for planning and evaluating super-speed (250-33mph) magnetic levitation (maglev) transportation systems...

High-Speed Non-Electric Locomotive Noise Measurements

This report summarizes the methods and results of train noise measurement carried out on August 30, 2001 at the Transportation Test Center in Pueblo, Colorado. The measurements were performed by Harris Miller Miller & Hanson, Inc on behalf of the Federa lRialroad Administration, under...

The Sound Environment in Locomotive Cabs

Measurements of the sound environment in locomotive cabs including audible warnings perceived by crew members are described. Data was collected during two different test runs under diverse conditions, one on the Long Island R.R. and the other on the St. Louis-San Francisco Railway. The crew's...

Flywheel Energy Storage Switcher

An indepth study of the application of flywheel energy storage to the railroad switchyard locomotive was conducted to determine the practicality and viability of such a system. The system, as originally conceived, required the use of separately excited fraction motors, and a major task of the study...

An Assessment of Railroad Locomotive Noise

Measurements of the noise generated by an SD40-2 diesel electric locomotive are described. The noise was measured in three types of moving tests: the first with the locomotive passing a 6-microphone array while under maximum power acceleration, the second with the locomotive simulating the...

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Technical Reports