Technical Reports

Methods for Joining of Rails: Survey Report

The performance of track structures depends greatly on the integrity of the connections between rail sections. Because the majority of service and detected rail failures occur at joints, particularly conventional bolted joints, this survey was conducted to review existing practices, examine...

Methodology for Evaluation the Cost and Benefit of Advanced Braking and Coupling Systems

This report presents a quantitative methodology for evaluating the costs and benefits of advanced railroad braking and coupling systems. Starting with a specification of the performance characteristics of candidate systems, the methodology employs four major elements to enable the user to compute...

Measurement of Friction Snubber Forces in Freight Car Trucks

The report describes the design and construction of a set of transducers intended to measure the normal forces (column loads) and friction forces applied by the four friction shoes to the wear plates of a standard, three-piece freight car truck. Two 70-ton trucks, an ASF Ride Control and a Barber S...

LTV/SIG Metroliner Truck Test- Volume II

An additional running test program of the LTV/SIG Metroliner trucks was conducted with the objective of defining suspension system characteristics. The tests were conducted on revenue tracks of the Penn Central Railroad in the Northeast corridor between Washington, D.C. and Hudson, N.J. Testing...

Linear Induction Motor Research Vehicle Wheel/Rail Adhesion Test

A principal factor in the design of effective propulsion and braking systems for new rail transportation equipment is the available adhesion vs speed characteristics of steel-wheel-on-steel-rail vehicles. Objectives of the LIMRV wheel/rail adhesion test were: (1) to obtain, over a wide speed range...

Lightweight Intermodal Flatcar Evaluation Program Volume I: Modal Analysis of Railcars, an Explanation and Application Guide

This report describes a methodology referred to as modal analysis which can be a very useful tool in the study of the dynamic behavior of any elastic or rigid body. The concepts of the technique are defined and illustrated with the use of a relatively simple one dimensional uniform beam. Following...

Lightning and Its Effects on Railroad Signal Circuits

This study discusses the occurrence of lightning, its effects on railroad signal equipment, and protection of such equipment from lightning damage, with special attention to known protective techniques which are employed in a variety of situations in the power, communications, and railroad...

Lateral Stability of Ballast - Ballast and Foundation Materials Research Program

This report presents the results of the lateral stability study of the Ballast and Foundation Materials Research Program. Full-scale lateral stability tests were conducted with a 2-rail, 3-tie system using slag, crushed limestone, and gravel as ballast. Various parameters including Peak Resisting...

Laboratory Investigation of Prestressed Concrete Crossties and Fasteners Manufactured in the U.S.S.R.

Soviet manufactured pre-stressed concrete crossties and fasteners were tested using AREA Bulletin 655 as a guide. The ties were subjected to the following tests: Rail Seat (Positive and Negative moment), Rail Seat Repeated Load, Tie Center (Positive and Negative moment), Rail Seat Ultimate and...

Improved Passenger Equipment Evaluation Program

The status of two foreign rail technologies is analyzed in this second of four semiannual reports. The two technologies are Trucks and Carbody Construction. Trucks are discussed from the viewpoint of their function in the rail vehicle suspension system. This function consists of vehicle guidance,...

« First
‹‹
…
133
134
135
136
137
138
139
140
141
…
››
Last »

USA Banner

Technical Reports