Technical Reports

Preliminary Evaluation of Rail Vibration Techniques for Rail Force Measurements

It has been postulated that the vibrational response of a railroad rail, subjected to a sharp mechanical impact, should vary according to the magnitude of the internal longitudinal force. In order to test this hypothesis, a series of tests were conducted at the A.A.R.'s Track Research Laboratory in...

Plate Instrumented Wheelsets for Measurement of Wheel/Rail Forces

Strain gauge instrumented wheelsets are an important research tool in experimental rail vehicle testing. This report expounds the principle of operation of the instrumented plate type of wheelset which is constructed by the scientifically exact application of strain gauges on the plate region of...

Performance of a Single-Sided Linear Induction Motor with Solid Back Iron and with Various Misalignments - Volume I

A test facility was designed and built to measure all aspects of the performance of a single-sided high-speed linear induction motor with solid back iron over a wide range of frequency, speed, and excitation. The facility was equipped and instrumented to measure all the usual performance parameters...

Performance of a Linear Synchronous Motor with Laminated Track Poles and with Various Misalignments

A test facility was designed and built to measure the performance of a single-sided high speed homopolar Linear Synchronous Motor with laminated pole pieces over a wide range of frequency and excitation levels. The facility was instrumented to measure performance at the machine terminals, flux...

Northeast Corridor Improvement Project Task 205: Cab Signal/Automatic Train Control/Train Performance Recorder General Specification

This document defines the standards and general specifications for the cab signal/automatic train control/train performance recorder system to be installed on vehicles to be operated on the improved Northeast Corridor. The specification indicates the features, performance, and other basic...

Nondestructive Techniques for Measuring the Longitudinal Force in Rails: Proceedings of a Joint Government-Industry Conference held in Washington, D. C., Februrary 26-27, 1979

The Conference on Nondestructive Techniques for Measuring the Longitudinal Force in Rails consisted of an introductory session followed by three major sessions on ultrasonic techniques, Barkhausen and sonic techniques, and X-ray diffraction techniques. This report is made up of the technical papers...

Metroliner Truck Improvement Program

This report summarizes the results of design and ride testing procedures followed in developing a Metroliner Truck Improvement Program. The Metroliner cars had been used in high speed Corridor service for nearly ten years and upgrading the truck suspension to modern standards for improved passenger...

Measurements of Wheel/Rail Loads on Class 5 Track

Measurements have been made on two tangent test sections and a curved test section to characterize the wheel/rail load environment on Class 5 track. The tangent-track test sections included a 3-mile length of bolted-joint rail under a 3-mile length of continuous welded rail. Wayside measurements...

Measurement of Wheel/Rail Forces at the Washington Metropolitan Area Transit Authority

Under the direction of the Urban Mass Transportation Authority (UMTA) measurements of wheel/rail forces were made in August 1979 by the Transportation Systems Center (TSC) with the assistance of Battelle Columbus Laboratories to determine the causes of excessive wheel/rail wear experienced by the...

Mathematical Modeling of DODX Railcars

This report presents the results of a project conducted to determine the roll stability characteristics of large capacity freight cars, 100 to 200 ton, loaded with high center of gravity containers. The model, obtained from AAR, is a 22 degree-of-freedom, non-linear, time domain model of railcars...

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Technical Reports