General

Analytical Methods for Freight Car/Truck Dynamic Problems

The analytical methods used to synthesize mathematical models of an 80-ton open hopper railroad car are presented in this report. The work described herein was performed as part of the Track-Train Dynamics program by the Analytical Mechanics Section, Martin Marietta Corporation, Denver Division....

Railroad Rail Flaw Detection System Based on Electromagnetic Acoustic Transducers

This report describes the design, construction and preliminary testing of an ultrasonic inspection vehicle intended for the detection of flaws in railroad tracks that are in commercial service. It differs from existing inspection systems in that it employs an ultrasonic transducer that does not...

Track Component Property Tests Volume II- Rail, Ties, Joint-Bars and Fasteners - Interim Report

The principal objective of this laboratory test program is to investigate the load capacity of track in the vertical and lateral planes to support assessments of track strength.

Railroad Car Coupling Shock, Vertical Motion, and Roller Bearing Temperature

Data were collected in a study of railroad car operating environment. Measurements were made on wheel bearing operating temperatures, coupling impact shock, and vertical motion of the car due to rail travel. Tests were conducted using an instrumented consist at the Transportation Test Center (TTC)...

High Cant Deficiency Test of the F40PH Locomotive and the Prototype Banking Amcoach

Increasing the speed of passenger trains in existing curves has been proposed as an alternative to changing curve radii for the purpose of reducing trip times on the Northeast Corridor. Tests were performed on the F40PH diesel-electric locomotive and an Amcoach modified for banking, with and...

Structure and Properties of Thermite Welds in Premium Rails

Thermite welds were used to join combinations of premium rails and AREA Controlled Cooled Carbon rails (i.e., standard rails). The premium rails comprised head-hardened rails and CrMo, CrV and Cr alloy rails. A major objective was to determine the feasibility of joining premium rails to each other...

Control of Wheel/Rail Noise and Vibration

This report presents the results of a program to develop and evaluate techniques for the control of wheel/rail noise in urban rail transit systems. The first part of the program included a literature review and a cost-benefit analysis to select, for further study, the most cost-effective wheel/rail...

Management of Urban Construction Programs Volume II: Supplemental Information

This report is part of a program sponsored by the Office of Rail and Construction Technology of the Urban Mass Transportation Administration. The overall objective of the study is to develop guidelines that can be used by local government authorities, such as transportation, water, and sanitation...

Safety of Vital Control and Communication Systems in Guided Ground Transportation. Analysis of Railroad Signaling System: Microprocessor Interlocking

The study has been conducted with the goal of gaining an insight into the issues of maintaining vital signal systems implemented with microprocessor chips and of making field changes to the application of such systems. To relate these abstract topics to concrete issues, two actual commercial...

Study of Braking Operations Using a Locomotive Simulator

The Volpe Center is currently supporting the Federal Railroad Administration in developing revisions to the safety standards for train air brakes. As part of the program, one of the tasks was to evaluate the effects certain operating parameters have on the performance and response of braking...

« First
‹‹
…
411
412
413
414
415
416
417
418
419
…
››
Last »

USA Banner

General