TOTAL FORCES ON A SUBMERGED RANDOMLY ORIENTED TUBE DUE TO WAVES

Total forces due to linear gravity waves on a small circular tube randomly oriented with respect to the wave direction are investigated. A generalized Morison-type equation is written in terms of the components of water particle kinematics normal to the inclined tube. Two component normal forces on two small sections of a 3-inch tube at different orientations are measured in an experiment in a wave tank. The hydrodynamic coefficients, CsubM & CsubD are calculated by a least square fit to the measured in-line forces. The coefficients are shown to depend on the period parameter without large scatter. Total in-line forces on the tube are computed based on the mean CsubM and CsubD curves and are found to correlate satisfactorily with the corresponding total measured in-line forces. Total normal forces on the tube sections are shown to be substantially higher than the in-line forces at large period parameters due to the contribution of the lift force.

Media Info

  • Features: References;
  • Pagination: p. 723-740

Subject/Index Terms

Filing Info

  • Accession Number: 00138191
  • Record Type: Publication
  • Source Agency: Offshore Technology Conference
  • Report/Paper Numbers: V1, OTC 2495 Proceeding
  • Files: TRIS
  • Created Date: Aug 23 1976 12:00AM