General

Finite Element Analysis of Railway Track Support System Ballast and Foundation Materials Research Program - User's Manual

A computer program for the finite element analysis of conventional railway track support systems has been developed. This report details a User's Manual and a Program Listing of the computer program.

Fatigue Crack Propagation in Rail Steels

In order to establish safe inspection periods of railroad rails information on fatigue crack growth rates is required. These data should come from a sufficiently large sample of rails presently in service. The reported research consisted of the generation and analysis of fatigue crack growth data...

Evaluation of Improved Track Structural Components Under Sub-Arctic Conditions

One area of concern to railroads in the northern third of the United States is the effect of frost heave and subsidence on track geometry. The purpose of this study was to evaluate two methods of improving track geometry and reducing maintenance in sub-arctic environments. Test track sections were...

Embankment Support for Kansas Test Track- Analysis of Embankment Instrument Data

Static and dynamic data collected from the embankment instrumentation at the Kansas Test Track are summarized in this report. The static data included permanent horizontal and vertical deformation measurements, moisture contents, and temperatures taken at intervals between the end of embankment...

Design and Testing of a 12,000 KVA Linear Induction Motor and Power Converter

This report presents pertinent technical data on the design, development, fabrication, and testing of the linear induction motor propulsion system (LIMPS). The LIMPS is designed to convert constant-voltage, constant-frequency, 3-phase, 60-Hz, 8250-V, wayside electrical power to a variable-voltage,...

Design and Analysis of a Track Compliance Measurement System

This report covers the design of a vehicle for measuring the static and dynamic compliance of railroad track. The static compliance system uses the rail deflections due to different axle loads to calculate the track compliance. The static compliance measurements are taken continuously as the...

Describing Function Techniques for the Non-Linear Analysis of the Dynamics of a Rail Vehicle Wheelset

The describing function method of analysis is applied to investigate the influence of parametric variations on wheelset critical velocity. In addition, the relationship between the amplitude of sustained lateral oscillations and critical speed is derived. The non-linearities in the model include...

Cost Effectivieness of Research and Development Related to Railroad Electrification in the United States

The object of this report is to determine the impact of research and development on railroad electrification in the United States. It is presumed that electrification is economically viable and that a prior commitment has been made to· electrifying the high density mainlines. Research and...

Correlation of Statistical Representations of Track Geometry with Physical Appearance

Railway track has previously been represented as a random process with certain parameters that relate to the quality of the track. This report helps to make these parameters more meaningful by correlating the random process and its parameters with more familiar descriptions of the track. The...

Comparative Analysis of Dynamics of Freight and Passenger Rail Vehicles

During the course of this contract, analytical studies have been conducted on several different rail vehicles typical of North American railroad operations mathematical models, and computer codes for the mechanization of these models have been generated under this contract to provide a predictive...

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General