FRICTIONAL AND VIBRATORY BEHAVIOR OF ROLLING AND SLIDING CONTACTS

Experimental investigations of the influence of rolling velocity, normal load and high-frequency normal vibrations on the traction/slip characteristics of rolling discs are described. Major findings are: (1) Measured creep coefficients are systematically lower by a factor of two to three than theoretically predicted ones. (2) Given this discrepancy (which remains unexplained), the creep coefficients are insensitive to rolling velocity or normal vibrations. (3) The rolling friction coefficient ('adhesion') is insensitive to normal vibrations and rolling velocity, for reasonably clean surfaces, however, high rolling velocities tend to centrifuge contaminants onto the rolling surfaces from the sides of the discs. (4) Traction does not decrease with increasing slip in the region of large slip, for reasonably clean surfaces. (Modified author abstract)

• Corporate Authors:

  Bolt, Beranek and Newman, Incorporated

  50 Moulton Street
  Cambridge, MA  United States  02138
• Authors:
  • Nayak, P R
  • Tanner, R B
• Publication Date: 1972-7-21

Media Info

• Pagination: 192 p.

Subject/Index Terms

• TRT Terms: Acceleration (Mechanics); Adhesion; Friction; Friction factor; Gears; Live loads; Oscillation; Power spectra; Railroad cars; Rolling contact; Sliding friction; Train track dynamics; Vibration; Wheels
• Identifier Terms: U.S. Federal Railroad Administration
• Old TRIS Terms: Acceleration physics; Fra; Running gear
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00047269
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: BBN-2402
• Contract Numbers: DOT-FR-10031
• Files: NTIS, TRIS
• Created Date: Sep 27 1973 12:00AM