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Investigation on effects of the sleeper defects on rail vehicle vibration

Mortezaee, H ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1115/DETC2012-70796
  3. Publisher: 2012
  4. Abstract:
  5. In this article effects of sleepers defect on rail vehicle vibration have been investigated. Two parallel rails of the track have been modeled as Euler-Bernoulli beams on elastic points as rail pads. Also sleepers have been modeled as visco-elastic Euler-Bernoulli beams. It is assumed that, some sleepers under the rail track have been fractured and modeled by two beams. The wheelset has 5 DOF which are longitudinal, vertical and lateral movements plus roll and axial rotations. To determine normal contact force between wheel and rail, relative position of wheel and rail has been determined at each instant. Using the coordinate of each wheel points in rail coordinate system, the penetration of wheel in rail has been determined. To determine rail-wheel contact forces, Hertzian nonlinear contact theory and Kalker theory have been used. A computer program has been developed that numerically solves the equations of motion of the train for different operating conditions using Runge Kutta Cash-Karp computation method. Using this model the effects of train velocity, wagon weight, number of fractured sleepers and fracture location on rail vehicle vibration have been investigated
  6. Keywords:
  7. Co-ordinate system ; Computation methods ; Different operating conditions ; Euler Bernoulli beams ; Non-linear contact theories ; Normal contact force ; Rail-wheel contact force ; Relative positions ; Defects ; Design ; Equations of motion ; Rail motor cars ; Runge Kutta methods ; Wheels ; Vibration analysis
  8. Source: ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2012, Chicago, IL, 12 August 2012 through 12 August 2012 ; Volume 1, Issue parts A and B , 2012 , Pages 865-871 ; 9780791845004 (ISBN)
  9. URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1736027