Technical Reports

An Evaluation of the Dynamics of a Magnetically Levitated Vehicle

An analytical and experimental evaluation was made of the stability and dynamic characteristics of a small scale magnetically levitated vehicle. The vehicle was levitated over a variety of guideway perturbations in an attempt at stimulating unstable modes of oscillation, No instabilities...

A Survey of Railroad AC Electrification Systems Throughout the World

This report describes the major features of various railroad electrification schemes for supplying the catenary from the source of power for ac operation. These features include: details of the power source, high-voltage substation connections, substation details, catenary-to-substation connections...

A Survey of Alcohol and Drug Abuse Programs in the Railroad Industry

A survey of 20 industrial alcoholism and counseling programs run by railroad corporations covering 58 variables was made by semi-structured interviews of program directors, union officials, and by questionnaires applied to individual clients. Descriptions of program policy, practices, penetration...

A Review of Rail-Wheel Contact Stress Problems

From its earliest days, railroad technology has been limited by an inadequate understanding of the mechanics of load transfer between wheel and rail. It is the purpose of this paper to indicate the major problems in this area, and to review the progress made to date in the solution thereof....

Locomotive-Based Top of Rail Friction Control Implementation Results and Issues Phase 1: Atomized Spray/Friction Control Product

This report documents the first phase of a test to determine what effect top of rail (TOR) friction modification has on rail surface friction, lateral curving forces, and train handling. In Phase 1, one type of TOR friction modifier and application system was evaluated, primarily on coal trains...

Estimation of Residual Stresses in Railroad Commuter Car Wheels Following Manufacture

A computer simulation of the manufacturing process of railroad car wheels is described to determine the residual stresses in the wheel following fabrication. Knowledge of, and the ability to predict, these stresses is useful in assessing the ability of wheels to perform safely under expected...

Revised Railroad Tank Car Damage Assessment Guidelines for Pressure Tank Cars

Under Federal Railroad Administration (FRA) Contract No. DTFR 53-93-C-00001, Task Order Number 115, the Transportation Technology Center, Inc. (TTCI), a subsidiary of the Association of American Railroads (AAR), conducted a multi-phase research project focusing on the field assessment of damage to...

Fatigue Behavior of Railcar Wheel Steel at Ambient and Elevated Temperature

This report presents the results of a material property test program undertaken on a Class B railcar wheel steel. This work was performed to obtain relevant fatigue data that may be used in support of a larger effort exploring the applicability of fatigue-based acceptance criteria for passenger...

Passenger Train Grade Crossing Impact Tests: Test Procedures, Instrumentation, and Data

Two full-scale impact tests performed June 4 and June 7, 2002, involved single Budd Company Pioneer-type cab car impacts into a heavy steel coil on a frangible support. For the first test on June 4, a cab car was fitted with a 1990's design front end, and for the second test on June 7, with a state...

Passenger Rail Train to Train Impact Test: Test Procedures, Instrumentation, and Data

A full-scale passenger rail train-to-train impact test was performed on January 31, 2002, at the Transportation Technology Center, Pueblo, Colorado. The actual speed of impact, as measured by the laser speed trap, was 29.9 mph resulting in a large amount of damage to the leading cab-car, which...

« First
‹‹
…
136
137
138
139
140
141
142
143
144
…
››
Last »

USA Banner

Technical Reports