eLibrary

Distributions of Dynamic Wheel/Rails Under Heavy Axle Loads

Under the Heavy Axle Load (HAL) program funded by the Association of American Railroads (AAR) and the Federal Railroad Administration (FRA), a test activity was initiated in 1997 to study the relationships between dynamic vehicle responses and track geometry conditions. As a first step, analyses...

Improved Roller Bearing Wayside Detection Research - Phase I Laboratory Test Report

A series of tests were performed at the Bearing Test Facility at the Transportation Technology Center in Pueblo, Colorado, to gather acoustic and acceleration emissions for a number of roller bearing defect types designated by the rail industry as a priority. This database will be used to develop...

High-Speed Ground Transportation Noise and Vibration Impact Assessment

This manual provides procedures for the assessment of potential noise and vibration impacts resulting from proposed high-speed ground transportation (HSGT) projects, including high-speed rail using traditional steel-wheel on steel-rail technology and magnetically levitated (maglev) systems. This...

Effect of Track Twist on Vehicle Dynamic Performance: Final Report

Results of tests conducted at the Transportation Technology Center (TTC), Pueblo, Colorado, indicate that vehicle response to track twist varies significantly with car type. Critical response variables include car body torsional stiffness, truck spacing, track alignment (tangent or curve), track...

Conventional Passenger Rail Vehicle Safety, Volume I: Summary of Safe Performance Limits

This report presents a methodology based on computer simulation that assesses the safe dynamic performance limits of commuter passenger vehicles. The methodology consists of determining the critical design parameters and characteristic properties of both the vehicle and the track, establishing the...

Considerations for the Development of Alloys Suitable for Use in In-Line Hardening of Rails, Wheels, and Tank Car Plate having Lower Bainite Microstructures

In-line hardening of rails to produce a very fine pearlitic microstructure has become a commercial reality. A question that this report seeks to answer is whether or not it is possible to find an alloy composition that will permit the development of lower bainite microstructures by in-line...

Trespasser Bulletin No. 5: Calendar Year 1996

[From the Introduction] Trespassers represent the second largest category of deaths associated with the operation of railroads and are only slightly surpassed by deaths that occur at highway-rail crossings. In 1996, 45.3% of all reported deaths were to trespassers and 47% occurred at highway-rail...

Safety of High Speed Ground Transportation Systems: Technical Descriptions of Advanced Braking Concepts for High Speed Ground Transportation

The objective of this study is to develop qualitative and quantitative information on the various braking strategies used in high-speed ground transportation systems in support of the Federal Railroad Administration (FRA). The approach employed in this study is composed of two steps: first, build a...

Preliminary Assessment of Options for Increasing Participation of Historically Black Colleges and Universities in the Federal Railroad Administration Research and Development Program

[From the Background Section] The Federal Railroad Administration (FRA) in meeting its mission and complying with the provisions of Executive Order 12928 supported this study to review options for expanding the participation of Historically Black Colleges and Universities (HBCUs) in the FRA...

Passenger Rail Corridor Risk Assessment

[From the Introduction] This presentation discusses the applications of and methodologies for performing risk assessments for passenger rail corridors: introduction to risk assessment and risk assessment terminology, uses of a rail corridor risk assessment, role of the FRA and rail industry...

« First
‹‹
…
475
476
477
478
479
480
481
482
483
…
››
Last »

USA Banner

eLibrary