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Train Energy and Dynamics Simulator (TEDS) Revenue Service Validation: Volume II Mixed Manifest Train with Distributed Power

Document Series
Technical Reports
Author
Federal Railroad Administration
Report Number
DOT/FRA/ORD-20/26
Office
RPD-32
Subject Rolling Stock
Keywords
Air brake, coupler forces, draft gear, slack action, tractive effort, TE, train dynamics validation, train operation, Train Energy and Dynamics Simulator, TEDS, rolling stock, simulation, software

From June 12, 2013, to July 31, 2017, the Federal Railroad Administration funded the development of the Train Energy and Dynamics Simulator (TEDS) software by Sharma & Associates, Inc. (SA) to study train operation safety and performance as affected by equipment, train makeup, train handling, track conditions, operating practices, and environmental conditions.  This report describes the validation of TEDS predictions using data collected from a revenue service mixed manifest train.  The test train had two locomotives at the head end and a remote helper at the rear end of the train.  The remote throttle was operated in sync with the head end.  Standing train air brake tests for full service and emergency applications were conducted for the distributed power configuration. Like the validation effort for the unit train completed in 2016, the analysis of simulated results and their comparison to the measured test data show that TEDS predictions are acceptable.  Train speed predictions are within ±2 mph of the measured speed.  Significant coupler forces, higher than 100 kips, are within ± 20% and brake system pressures are within ±5 psi of measured data.  These results clearly establish the ability of TEDS to accurately replicate field events and complete the TEDS validation effort.

See Also: Train Energy and Dynamics Simulator (TEDS) Revenue Service Validation: Volume I Unit Train


Last updated: Wednesday, July 1, 2020