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28
Sep
2023
Technical Reports
Bearing Grease Degradation Related to Water and Roller Bluing
Subject
Rolling Stock
Keywords: Coupler, knuckle, failure, fatigue, fracture, life calculation, load case combination, stress, tensile strength, train operatio Roller bearings, water-etch, non-verified bearing failure, testing, rolling stock, lube stain, grease
Abstract:
The Federal Railroad Administration sponsored a team from Transportation Technology Center, Inc. to conduct two investigations to improve the safety of roller bearing...
Report Number
DOT/FRA/ORD-23/33
Office
RDI-22
15
Sep
2023
Technical Reports
Vehicle Dynamics Models for Derailment Incident Investigation
Subject
Rolling Stock
Keywords: Derailment, freight car dynamics, vehicle dynamics, VAMPIRE simulations, vehicle track interaction, wheel rail interaction
Abstract:
When investigating a train derailment, vehicle/track interaction (VTI) using vehicle dynamics simulations of the key vehicles in the derailed train can help identify specific...
Report Number
DOT/FRA/ORD-23/27
Office
RDI-22
15
Sep
2023
Technical Reports
Office Safety Checker for Moving Block Train Control Systems
Subject
Train Control
Keywords: Office Safety Checker (OSC), Quasi-moving block (QMB), Full Moving Block (FMB), Interoperable Train Control (ITC), Positive Train Control (PTC), Centralized Interlocking (CIXL)
Abstract:
As part of a project sponsored by FRA, TTCI developed and analyzed a concept for the Office Safety Checker (OSC) component of the Moving Block Office (MBO), a segment of a...
Report Number
DOT/FRA/ORD-23/28
Office
RDI-23
15
Sep
2023
Technical Reports
Operational Performance and Reliability, Availability, and Maintainability Analysis Model (OPRAM) Development
Subject
Train Control
Keywords: Overlay Positive Train Control, Higher Reliability and Capacity Train Control, Enhanced Overlay PTC, Quasi-Moving Block, Full Moving Block, Reliability Availability and Maintainability, Operational Performance
Abstract:
Transportation Technology Center, Inc. (MxV Rail) conducted a project for the Federal Railroad Administration (FRA) to complete the development of Operational Performance and...
Report Number
DOT/FRA/ORD-23/29
Office
RDI-23
5
Sep
2023
Technical Reports
Torsional Strength and Stiffness of a Passenger Car Coupling System
Subject
Rolling Stock
Keywords: Full Scale Testing, H couplers, Coupler Torsion, Torsional Transmission
Abstract:
Between September 2019 and June 2022, the Federal Railroad Administration (FRA) sponsored a research team from Sharma & Associates to model and test the torsional strength...
Report Number
DOT/FRA/ORD-23/24
Office
RDI-22