RESEARCH TUNES IN TO REDUCE VIBRATIONS

The author describes an investigation by Reading University in collaboration with the Transport and Road Research Laboratory into the use of a tuned vibration absorber to reduce vibrations in bridges. Consisting of an auxiliary mass spring system tuned to a frequency equal to the natural frequency of the bridge to which it is attached, the device absorbs the vibrational energy diverted to it. Using a viscous damper to provide effectiveness over a wider range of frequencies, experiments were carried out using a point load and a moving load. The results show that vibration amplitude under moving traffic conditions can be greatly reduced and that the decay tail of the vibration curve is much shorter thus increasing the fatigue life of the bridge structure. /TRRL/

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 22
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00194894
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Aug 15 1979 12:00AM