A continuum model with microstructure is presented for a railroad track system. The track is represented as a laminated structure with two layers continuously supported by springs and dampers. Solutions for deflections of the track system subjected to a moving wheel load are obtained in a close form using complex Fourier transforms for both damped and undamped foundations. Comparisons are made with the results obtained from quasi-static models of the track, which simulate the track as a single equivalent homogeneous beam on an elastic foundation with an effective modulus suggested by W. Voigt. Results of the model are compared with experimental data in limiting cases. Critical velocities are calculated for the track system with conventional rails. The influence of foundation modulus on critical velocity is analyzed in some detail. Critical velocities are also computed for an equivalent homogeneous track system using equations advanced by A.D. Kerr for a beam.

  • Availability:
  • Corporate Authors:

    IPC Science and Technology Press Limited

    IPC House, 32 High Street
    Guildford, Surrey  England 
  • Authors:
    • Prasad, B
    • Garg, V K
  • Publication Date: 1979-10

Media Info

  • Features: References;
  • Pagination: p. 359-366
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00311047
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jun 9 1980 12:00AM