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原文传递 Development of Gage Widening Projection Parameter for the Deployable Gage Restraint Measurement System.

题名：	Development of Gage Widening Projection Parameter for the Deployable Gage Restraint Measurement System.
作者：	SUNDARAM, N.; SUSSMANN, T.
关键词：	GAGES; RAILROADS; STRAIN MEASUREMENT
摘要：	This report describes the development of the new Gage Widening Projection (GWP) formula as a replacement for the Gage Widening Ratio (GWR) parameter that has been used as an index of weak or strong tie and fastener condition. Gage restraint measurement systems (GRMS) use GWR and the Projected Loaded Gage (PLG) index to assess the risk of freight train derailment due to gage widening. Development of new GRMS systems and their subsequent evaluations, however, have identified inconsistency in the current GWR equations on the treatment of different loading conditions and different vehicle characteristics. A comparison test in October 2002 between the Holland TrackSTAR, a deployable single split axle, hi-rail GRMS, and the FRA T-6, a railbound GRMS with a truck-mounted split axle, showed a significant difference in defect numbers reported by these vehicles. Analyses and field evaluations indicated that these discrepancies were attributed to various factors, including the GWR equation, measurement accuracy problems, and differences in the physical configuration of the vehicles.
报告类型：	科技报告