HYDRAULIC DAMPERS

As far as vehicle suspension incorporating steel springs is concerned, the number of damping characteristics can be limited to two; friction damping and viscous damping. Friction damping occurs in every system and is maintained by friction forces acting in opposition to the motion. With true (Theoretical)viscous damping the damping force opposing the oscillation is proportional to the velocity of the latter. Many hydraulic dampers meet this requirement over the lower range of their characteristic. The effect of damping on the pattern of vibration decay and the effect of damping on the force and displacement transmissibility and resultant acceleration are shown. The Askania hand vibrograph is illustrated, along with the vibrograph records of diesel-electric locomotives. Typical characteristics of various damping methods encountered with railway vehicles are graphed.

• Corporate Authors:

  Temple Press Limited

  161-166 Fleet Street
  Longon EC4,   England 
• Authors:
  • KOFFMAN, J L
• Publication Date: 1959-10-30

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 362-366
• Serial:
  • RAILWAY GAZETTE
  • Volume: 111

Subject/Index Terms

• TRT Terms: Damping (Physics); Equipment tests; Friction; Locomotives; Motor vehicles; Nondestructive tests; Spring; Suspensions; Technology; Trucks; Vehicle dynamics; Vibration
• Geographic Terms: United Kingdom
• Old TRIS Terms: Locomotive vibration; Test equipment; Vehicle vibration
• Subject Areas: Motor Carriers; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00037703
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 4 1994 12:00AM