PARAMETRIC STUDY TO RELATE RAILCAR SPEED PERMISSIBLE COMBINATIONS OF TRACK GEOMETRY DEVIATIONS

A passenger railcar was modeled using quasi-linear, frequency domain computer simulation models to compute lateral and vertical rms wheelset forces and relative displacements over a range of speeds, in response to power spectra representations of track geometry deviations in surface, alinement, and crosslevel. A simplified wheel-climb criterion (Lateral to Vertical Force Ratio, L/V) was used to estimate the margin of safety for wheel-climb and to impose limits on combined track geometry deviations which result in development of lateral and vertical forces which would cause a commonly used threshold value to be exceeded on a statistical basis. "Constant performance" contours of speed versus combined track geometry deviations are developed for selected L/V threshold values and exceedance probabilities.

  • Corporate Authors:

    American Society of Mechanical Engineers

    345 East 47th Street, United Engineering Center
    New York, NY  United States  10017
  • Authors:
    • Di Masi, F P
    • Weinstock, H
  • Publication Date: 1978-12

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00196524
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Aug 15 1979 12:00AM