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1 Jan 1978

Technical Reports

Nondestructive Measurement of Longitudinal Rail Stresses (Final Report)

Author
D.M. Egle, D.E. Bray

Subject Evaluation

Keywords: Rail Stress Management, Nondestructive Measurement, Ultrasonic Stress Measurement, Acoustoelasticity, Guided Waves

Abstract: An ultrasonic probe has been designed, evaluated, and shown capable of measuring longitudinal stress changes in railroad rails. The probe utilizes the effect of applied stress on...

Report Number
FRA/ORD-77/09.1
Office
RRD

1 Jan 1978

Other Reports

A New Approach to Railroad Cost Estimation

Author
Andrew F. Daughety, Mark A. Turnquist, Ronald R. Braeutigam

Subject Evaluation

Keywords: Service Quality, Ride Quality, Economic Analysis, Econometric Estimation Process

Abstract: Cost functions for railroad firms are an important element of management decision-making. They are also a principal basis for regulatory policy. Standard ICC cost-finding...

Report Number
DOT-OS-70061
Office
RRD

1 Jan 1978

Technical Reports

Ultrasonic Pulse Propagation in the Cold-Worked Layer of Railroad Rail

Author
University of Oklahoma, School of Aerospace, Mechanical, and Nuclear Engineering

Subject Rail and Infrastructure Integrity, Evaluation

Keywords: Wave Propagation, Layered Media Wave Propagation, Texture, Rail Nondestructive Inspection

Abstract: Ultrasonic pulses propagating along the rolling surface of used railroad rail were observed to have two distinct arrivals. One arrival corresponded to the expected Rayleigh wave....

Report Number
FRA/ORD-77/09.2
Office
RRD

7 Dec 1977

Technical Reports

Potential Means of Cost Reduction in Grade Crossing Motorist-Warning Control Equipment. Volume II. Comparison of Solid State and Relay Devices and Techniques

Author
Holmstrom, F. R.

Keywords: Rail transportation, Warning systems, Electric relays, Solid state devices, Control equipment, Cost estimates, Circuits, Reliability, Maintainability, Railroad highway crossings

Abstract: Consideration is given to the properties of solid-state circuits, miniature relays and large gravity-operated relays when applied to control systems for grade crossings equipped...

Report Number
DOT/FRA/ORD-77/45.II
Office
RDI-20

1 Dec 1977

Technical Reports

Energy Intensity of Intercity Passenger Rail

Author
Ram K. Mittal

Subject Environmental Protection, Passenger Rail

Keywords: Energy Intensity of Intercity Rail; Energy Efficiency; Transportation Energy; Energy Collservation

Abstract: This research report deals with the Energy Intensity of Intercity Rail Passenger Systems. Included in the energy evaluation are the impacts of operating conditions (speed, load...

Report Number
DOT/RSPD/DPB-50-78/7
Office
RRD