The report documents a study of the causes of wheel flange wear and derailment on the Massachusetts Bay Transportation Authority (MBTA) Orange and Blue Rapid Transit Lines. The study included both full-scale testing using instrumented wheels on the track in question and a computer model of wheel/rail curve performance. Both experimental and predicted data are presented. Parameters affecting wheel wear considered in the study include: longitudinal suspension stiffness, wheel profile, and track curvature. Two wheel profiles, 1:20 and 1:40 were used in the test track curvature of the four test curves, which varied from 1.3 to 9.3 degrees. The computer model included lower primary suspension stiffness and worn wheel profile. The study recommends that MBTA should consider changing its standard wheel profile from 1:40 to a worn wheel profile, such as AAR1. Additional benefits in curving performance could be obtained from a significant reduction in the longitudinal stiffness of the primary suspension chevron.
Causes of Wheel Flange Wear and Derailments on MBTA Orange and Blue Lines
1989
188 pages
Report
No indication
English
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