DYNAMICS OF INDEPENDENTLY ROTATING WHEEL SYSTEMS

The report presents the results of an analysis of the dynamics of individually rotating wheel systems for use on high speed rail systems such as the Tube Vehicle System (TVS). The objective of this system is to remove the hunting stability problems of conventional rail-wheel systems and thus improve the vehicle ride comfort and safety. The analysis indicates that the use of independently rotating wheel systems eliminates the standard hunting instability, but it introduces a lightly damped but stable oscillation of its own. However, by increasing the yaw stiffness, the frequency of this oscillation can be moved beyond the low point in the human vibration tolerance limit. When this is done, the ride response is improved over that for a conventional integral wheel system. (Author)

• Supplemental Notes:
  • High-Speed Ground Transportation Systems Engineering Study.
• Corporate Authors:

  TRW Systems Group

  One Space Park
  Redondo Beach, CA  United States  90278
• Authors:
  • Kaplan, A
  • SHORT, S A
• Publication Date: 1970-7

Media Info

• Pagination: 74 p.

Subject/Index Terms

• TRT Terms: Damping (Physics); Dynamics; Equations of motion; Laws; Mathematical models; Pneumatic conveyors; Railroad cars; Rotation; Safety; Stability (Mechanics); Stiffness; Vibration; Wheels
• Old TRIS Terms: Tube vehicles
• Subject Areas: Law; Railroads; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00039227
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: 06818-6045-RO-00 Final Rpt, FRA-RT-71-47
• Contract Numbers: DOT-C-353-66
• Files: TRIS
• Created Date: Nov 24 1972 12:00AM