FRICTION DAMPING

The Alsthom truck for Co-Co electric locomotives, the S.I.G. truck for electric railcars, the Werkspoor truck for electric railcars, and Allan truck for diesel-electric railcars are photographed showing the spring systems. The action of friction (Coulomb) and hydraulic (viscous) damping is illustrated with the aid of force-displacement diagrams. The effect of friction and hydraulic damping on force transmission and oscillation amplitude ratio as a function of frequency ratio and the effect of oscillation amplitude on dynamic stiffness of leaf springs as affected by friction are also illustrated. The advantages of friction damping are mentioned.

• Corporate Authors:

  Temple Press Limited

  161-166 Fleet Street
  Longon EC4,   England 
• Authors:
  • KOFFMAN, J L
• Publication Date: 1959-11-13

Media Info

• Features: Figures; Photos; References;
• Pagination: p. 422-425
• Serial:
  • RAILWAY GAZETTE
  • Volume: 111

Subject/Index Terms

• TRT Terms: Dampers; Damping (Physics); Friction; Motor vehicles; Railroad electrification; Ride quality; Spring; Springs (Vehicles); Suspensions; Technology; Trucks; Vehicle design; Vibration
• Geographic Terms: Italy; Netherlands; Portugal; United Kingdom
• Old TRIS Terms: Helical springs; Vehicle vibration
• Subject Areas: Design; Motor Carriers; Railroads;

Filing Info

• Accession Number: 00037702
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 4 1994 12:00AM