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Effects of Rail Profile Variation

Railroads in various countries including the United States have found that benefits may be obtained by grinding rails to an 'asymmetric' profile rather than to the original 'new' rail profile. To investigate these findings further, the Federal Railroad Administration (FRA) and the Association of...

Performance of Degraded Roller Bearings

Concerns over railroad bearing failure prompted a test to be conducted to measure the rate at which degraded bearings overheat under service conditions. A test consist which included a locomotive, a data collection car and four test cars containing 24 subject bearings was utilized. The bearings...

Statistical Representations of Track Geometry Volume I- Text

Mathematical representations of railroad track geometry variations are derived from time series analyses of track measurements. Since the majority of track is free of anomalies (turnouts, crossings, bridges, etc.), representation of anomaly-free track is first considered. Anomalies are then...