Results 131 to 140 of about 357 (162)
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Risk Analysis, 1991
Existing approaches to routing hazardous material shipments by rail recognize that track condition is an important influence, but have not included it in the risk assessment and routing models. This note explores the influence of track condition based on predictions of internal defects in the rail.
S, McNeil, S C, Oh
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Existing approaches to routing hazardous material shipments by rail recognize that track condition is an important influence, but have not included it in the risk assessment and routing models. This note explores the influence of track condition based on predictions of internal defects in the rail.
S, McNeil, S C, Oh
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Technology for Recovery of Defective Rail Bars
2021The continuous welded rail track is the main design of the track used by the railways and can be operated in accordance with the technical requirements established by the railways on the tracks of all classes. The paper presents the calculation of the possibility of laying a continuous welded rail track.
Alexander Savin +3 more
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Tribological characterization of rail squat defects
Wear, 2013Rail squats remain a major rolling contact fatigue problem for mass transit authorities. Several studies have been conducted to supplement the standard characterization of rail squats. In particular an extensive tribological and metallurgical investigation was performed on samples of incipient squats from various areas.
Simon, Samuel +4 more
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AN APPROACH FOR RISK ASSESSMENT OF RAIL DEFECTS
International Journal of Reliability, Quality and Safety Engineering, 2010Rail defects appear in a greater variety and frequency due to higher axle loads and increasing traffic density in passenger and freight trains. Many of these rail defects, if left undetected, can develop into rail breaks, which may lead to train derailments.
SAURABH KUMAR +3 more
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Exploration of Rail Defects Detection System
2018 5th International Conference on Information Science and Control Engineering (ICISCE), 2018To solve the problem of improving the detection efficiency of rails, a rail surface defect detection system was proposed. Combine the general model of machine vision with the relevant characteristics of rail surface defects, use image processing methods to analyze the results of rail flaw detection and the actual track image, accurately find out the ...
Yuanyuan Liu, Longtao Fan, Sen Zhang
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Method and instrumentation for detection of rail defects, in particular rail top defects
2011A method and instrumentation for detection of rail defects, in particular rail top defects, in a railway-track by measuring an axle box acceleration signal of a rail vehicle, wherein a longitudinal axle box acceleration signal is used as a measure to detect the occurrence of said rail defects, in particular rail top defects.
Li, Z. (author), Molodova, M. (author)
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Growth of the Shell/Transverse Defect in Rails
Journal of Tribology, 1989An approximate analysis of the shell/transverse defect growth in steel rails during use is presented. A general solution for a single subsurface crack is presented first. A simpler approach, which considers the transverse defect alone, is examined as well. Residual stresses are included by introducing their stress distributions mechanically. A proposed
Maria Min-Hui Yu, L. M. Keer
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A Coarse-to-Fine Model for Rail Surface Defect Detection
IEEE Transactions on Instrumentation and Measurement, 2019Computer vision systems have attracted much attention in recent years for use in detecting surface defects on rails; however, accurate and efficient recognition of possible defects remains challenging due to the variations shown by defects and also noise. This paper proposes a coarse-to-fine model (CTFM) to identify defects at different scales.
Haomin Yu +6 more
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Filter-based feature selection for rail defect detection
Machine Vision and Applications, 2004Over the last few years research has been oriented toward developing a machine vision system for locating and identifying, automatically, defects on rails. Rail defects exhibit different properties and are divided into various categories related to the type and position of flaws on the rail. Several kinds of interrelated factors cause rail defects such
C Mandriota +4 more
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Laser ultrasonic detection of rail defects
AIP Conference Proceedings, 2002The objective of this study is to investigate laser-ultrasonic methods for non-contact detection and characterization of rail defects. Theoretical studies reveal that the most effective wave mode for detecting transverse defects is the shear wave propagating at high angles.
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