Integrated Dynamic Modeling of Rail Vehicles and Infrastructure: Modeling Switch Geometry

Many procedures have been proposed to solve the wheel/rail contact problem, most of which belong to one of two categories: off-line and on-line contact search methods. This investigation is focused on the development of a contact surface model for the wheel/rail contact problem in the case where an on-line three-dimensional non-conformal contact evaluation procedure, such as the elastic contact formulation - algebraic equations (ECF-A), is adopted. The goal is to demonstrate that the contact surface must have continuity in the second order spatial derivatives when used in conjunction with ECF-A. Many of the existing rail surface models rely on direct linear interpolation of profile curves which leads to first order spatial derivative discontinuities. This, in turn, leads to erroneous spikes in the prediction of contact forces. The main contribution of the work presented in this area is the development of a new finite element based procedure for representing the rail surface geometry in railroad vehicle contact problems.

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  • Supplemental Notes:
    • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program. This final report for NURail project NURail2012-UIC-R05 consists of two distinct documents, "Integrated Dynamic Modeling of Rail Vehicles and Infrastructure: Modeling Switch Geometry" and "Integrated Dynamic Modeling of Rail Vehicles and Infrastructure: Wheel Climb at a Large Angle of Attack."
  • Corporate Authors:

    National University Rail Center (NURail)

    University of Illinois at Urbana-Champaign
    Department of Civil and Environmental Engineering, 205 N. Mathews Avenue
    Urbana, IL  United States  61801

    Research and Innovative Technology Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Shabana, Ahmed A
    • Hamper, Martin B
  • Publication Date: 2015-8-28

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Pagination: 6p

Subject/Index Terms

Filing Info

  • Accession Number: 01599227
  • Record Type: Publication
  • Report/Paper Numbers: NURail2012-UIC-R05-A
  • Contract Numbers: DTRT12-G-UTC18
  • Files: UTC, TRIS, RITA, ATRI, USDOT
  • Created Date: Apr 27 2016 10:16AM