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Rolling Stock
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52550
  
  

  15
Feb
2024
Technical Reports
Impact of Advanced Train Control Technologies on Rail Network Safety and Operational Performance
Author
          Federal Railroad Administration

Subject
                    Rolling Stock

**Keywords:** Advanced braking system, ABS, braking characteristics, freight train, network capacity, network velocity, passenger train, Positive Train Control, PTC, shared corridor, track utilization, train delay
**Abstract:** From September 2018 to September 2021, the Federal Railroad Administration contracted Sharma & Associates to conduct an analysis of simulation results from a 5,000-mile...
Report Number
              DOT/FRA/ORD-24/10

  Office
              RDI-22
    28
Sep
2023
Technical Reports
Bearing Grease Degradation Related to Water and Roller Bluing
Author
          Federal Railroad Administration

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
Author
          Federal Railroad Administration

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
    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
    10
Apr
2023
Technical Reports
Comparison of Measured and Simulated Longitudinal Coupler Force on Tank Cars
Author
          Federal Railroad Administration

Subject
                    Hazardous Materials,
                    Rolling Stock

**Keywords:** Tank Cars, Rail, Stub Sill Failures, Impact Test, Yard Operation, Car Coupling, Draft Gear, Instrumented Couplers, Longitudinal Force, Simulation, Modeling
**Abstract:** Fractures in the stub sills of tank cars pose a significant problem for the rail industry due to the potential for damage to the tank structure and eventual release of the...
Report Number
              DOT/FRA/ORD-23/10

  Office
              RPD-22

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