Wheel-Rail Interaction Fundamentals
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Wheel-Rail Interaction Fundamentals

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Details:

  • Creators:
    Oldknow, Kevin
  • Corporate Creators:
    Oldknow Consulting
  • Subject/TRT Terms:
  • Resource Type:
    Presentations
  • Geographical Coverage:
    United States
  • Edition:
    Principles Course
  • Corporate Publisher:
    Oldknow Consulting
  • Abstract:
    The Wheel-Rail Interaction Fundamentals presentation, delivered by Kevin Oldknow, provides a comprehensive technical overview of the key physical principles governing the interaction between train wheels and railway tracks. Structured across three parts, the presentation explores (1) the anatomy of the wheel/rail interface, contact patch geometry, and the role of creepage in traction force generation; (2) vehicle dynamics related to steering, curving, wear mechanisms, and the onset of rolling contact fatigue (RCF); and (3) the role of the third body layer and strategies for friction and noise management. While Parts 1 and 2 lay the foundation for understanding the basics of wheel/rail interaction, Part 3 focuses on how these interactions as well as noise generation can be modified through the effective use of lubricants. Using foundational mechanical theories such as Hertzian contact and traction-creepage relationships, the presentation emphasizes the implications of lateral and longitudinal creepage on stability, wear, and safety. It further investigates how variations in frictional behavior, particularly through friction management systems—impact curving forces, fuel efficiency, derailment risk, and acoustic emissions. Real-world measurements, modeling outputs, and applied engineering solutions are integrated throughout, offering a vital framework for understanding the mechanics and operational challenges within both freight and passenger rail systems.
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