Technical Reports

Aerodynamic Forces on Various Configurations of Railroad Cars and Carrying Trailers and Containers

Toward improving the energy efficiency of rail intermodal service, the aerodynamic characteristics of the rolling stock offer a significant opportunity for betterment. At speeds above 45 miles per hour more than half of the resistance of an intermodal train is caused by the aerodynamic drag of the...

Urban Rapid Rail Vehicle and Systems Program Engineering Test of ACT-1 Vehicle at Transportation Test Center

This document contains a description of the ACT vehicles as delivered to UMTA, including major changes incorporated during testing at the Transit Test Center (TTC), Pueblo, Colorado, and the rationale for these changes. The test program is described in detail and results are presented for...

ACT-1 Advanced Concept Train Development Program, Phase II: Design, Fabrication, and Functional Test

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Analysis of Data from the First Wheel Experiment at the Facility for Accelerated Service Testing

The Facility for Accelerated Service Testing (FAST), located at the Transportation Test Center near Pueblo, Colorado, is a joint government/ industry program for accelerated life cycle testing of railroad track and mechanical components. The facility consists of a 4.8-mile loop around which a...

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...

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...

Thermal Buckling of Straight Tracks: Fundamentals, Analyses, and Preventive Measures

This report, written mainly for the practicing railroad engineer, explains the phenomenon of thermal buckling of straight tracks, shows how to analyze it, and describes measures for preventing it. Following an introductory discussion of track buckling problems caused by a temperature increase in...

Technical Documentation, Locomotive Response Model

This report represents the technical manual documentation for the Locomotive Response Model, a mathematical model, for analyzing the dynamic response of a six-axle locomotive on tangent track, and is developed using a numerical integration technique. The locomotive is represented by a thirty-nine (...

Self-Synchronous Propulsion System for Rapid Transit Railcars: Advanced Subsystem Development Program Volume I - Program Synthesis

Development of the Self-Synchronous Propulsion System was conducted under the Advanced Subsystem Development Program (ASDP) , which is a part of the Urban Rapid Rail Vehicle and Systems (URRV&S) Program sponsored by the Urban Mass Transportation Administration. The Self-Synchronous Propulsion...

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