THE CONTROL OF STRUCTURAL VIBRATION BY FRICTIONAL DAMPING IN JOINTS

Frictional damping mechanisms which may occur in joints are presented and discussed. Relative macro-slip between the joint interface in the plane of the joint provides the greatest damping. Linearised theories appear to be adequate for describing the macro-slip range. An optimum clamping is shown to exist under which the joint dissipates maximum vibrational energy; a different clamping force may be necessary to minimise the vibration response of a structure. If this slip is allowed, a large increase in the inherent structural damping is possible. The author claims that it is often not necessary to add a special damping device to increase the frictional damping, optimisation of an existing joint, or joints, is all that is required. Fretting corrosions can be controlled by hardening the joint interfaces or by using edm joints. Experimental results are given to show the frequency response of a frame within a friction damping joint and the variation of slip amplitude with the clamping force. (TRRL)

  • Corporate Authors:

    Modino Press Limited

    50 Pine Grove
    London N2O 8LA,   England 
  • Authors:
    • BEARDS, C F
  • Publication Date: 1980-6

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Filing Info

  • Accession Number: 00325673
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jun 12 1981 12:00AM