The acquisition and analysis of ride-vibration data for the AIRTRANS automated-guideway-transit system at the Dallas-Forth Worth Regional Airport are discussed. The ride vibrations are measured as translational components of the vehicle floorboard accelerations in the three principal directions. The total record for a complete loop around the network was subdivided into sections of straight, gently curved, and sharply curved zones, and ensemble-averaged spectra for each type of zone were compared. The spectral-response characteristics between straight and gently curved zones are not very different, but the sharp turns increase the frequency, particularly in the 10 to 30-Hz range. The low-frequency behavior gives a multipeaked spectrum arising from the body and wheel modes as modified by kinematic resonances at frequencies corresponding to travel wavelengths that are multiples of the steering and main wheel bases. The ride quality was compared to a recent International Organization for Standardization standard, to a comfort criterion based on passenger satisfaction as found in small aircraft, and to ride ratings in a sedan automobile. All three predicted adequate ride satisfaction; the second method showed a 70 percent satisfaction level 94 percent of the time.

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References;
  • Pagination: pp 7-12
  • Monograph Title: Transportation ride quality
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00179350
  • Record Type: Publication
  • ISBN: 030902675X
  • Files: TRIS, TRB
  • Created Date: Oct 12 1978 12:00AM