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28
Sep
2023
Technical Reports
Enhancing the Safety of Coupler Knuckles
Subject
Rolling Stock
Keywords: Coupler, knuckle, failure, fatigue, fracture, life calculation, load case combination, stress, tensile strength, train operation
Abstract: The primary objective of this research was to validate the finite element (FE) stress levels obtained during previous research through physical testing of a selected knuckle...
Report Number
DOT/FRA/ORD-23/32
Office
RDI-22
21
Sep
2023
Technical Reports
Vertical Split Rim: Causes and Prevention
Subject
Rolling Stock
Keywords: Vertical split rim, VSR, wheel cracks, finite element analysis, FEA, residual stress, fatigue damage models, finite element, FE
Abstract: Vertical split rim (VSR) is a serious railway wheel failure mode that requires further research. Visual clues are not usually present until the crack propagates through the rim...
Report Number
DOT/FRA/ORD-23/30
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
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
15
Sep
2023
Environmental Review Documents
Brightline West - Las Vegas to Victor Valley NEPA Reevaluation: NEPA Decision Memo Final: September 15, 2023