RESPONSE OF FREE HANGING CAISSON TO OCEAN CURRENTS

An analysis is made of the effect of turbulence on the vortex shedding induced vibrations of very long caissons in ocean currents. It is shown that the turbulence characteristics are important for the response. If the ratio between the typical period of the turbulent fluctuations and the time scale for growth of vortex induced vibrations falls below a certain threshold then the fatigue damage done to the system will be rapidly decreasing with increasing turbulence intensity. The effect is particularly large when the vibrational diameter is below 0.5 diameters such that the development of the vortex correlation length becomes important. The particular behaviour is of great importance in the design of spoiler systems for long caissons.

  • Supplemental Notes:
    • OMAE 1995, 14th Intl Conf on Offshore Mechanics & Arctic Engng; 18-22 June 1995; Copenhagen, Denmark. Sponsored by ASME et al. Procs. Publ by ASME, ISBN 0-7918-1307-X. Vol I, Pt B, p 407 [8 p, 14 ref, 1 tab, 10 fig]
  • Authors:
    • Pedersen, B
    • Nedergaard, H
    • Hansen
    • N-E, O
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00718538
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 27 1996 12:00AM