EFFECT OF THE FORCE OF VISCOUS FRICTION ON OSCILLATIONS OF THE SYSTEM OF SLIDING FRAMES OF PANTOGRAPHS

VLIIANIE SILY VIAZKOGO TRENIIA NA KOLEBANIIA SISTEMY PODVIZHNYKH RAM TOKOPRIEMNIKOV (TRUDY O.M.I.I.T.A. 137)

Improvement of current collection at high speeds can be attained by the introduction of damping in the various assemblies of the current collector mechanism. In order to correctly select the optimal parameters of the damping element, it is necessary to analyze the influence of the presence of viscous (or dry) friction in the system upon the oscillation process. An equality describes the free oscillations of a load supported on springs; this defines vertical oscillations of an absolutely firm load on an absolutely weightless spring. In real conditions the movement of material means occurs in an environment with resistance: (1) dry (or coulomb) friction; (2) viscous (or linear resistance) proportional to the first degree of speed; (3) vortical (or square), proportional to the square of the speed. The report concludes that (1) the application of damping oscillations of the frames of the current collectors causes an increase in the period of free oscillations, which depends upon the size of their mass and the firmness of the measuring spring (train traffic speed). (2) During the analysis of results of experiments or calculations, interactions of the current collector equipped with damping and the catenary lead, it is necessary to take into consideration the influence of the size of the resistance coefficient of the damper upon the free oscillation period of the current collector.

  • Supplemental Notes:
    • Abstract only is available in English, original untranslated as of November 1976.
  • Corporate Authors:

    Omsk Scientific Research Institute (Om.I.I.Ta.)

    Omsk,   USSR 
  • Authors:
    • Mikheev, V P
    • Zharkov, V T
    • Drobatenko, A F
  • Publication Date: 0

Language

  • Russian

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00130297
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Report/Paper Numbers: No. 137 Proceeding
  • Files: TRIS, USDOT
  • Created Date: Nov 23 1977 12:00AM