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.

• Supplemental Notes:
  • Presented at the Eighth Annual Offshore Technology Conference, Houston, Texas, May 3-6, 1976.
• Corporate Authors:

  Offshore Technology Conference

  6200 North Central Expressway
  Dallas, TX  United States  45206
• Authors:
  • Chakrabarti, S K
  • Tam, W A
  • Wolbert, A L
• Conference:
  • Presented at the Eighth Annual Offshore Technology Conference, Houston, Texas, May 3-6, 1976.
• Publication Date: 1976-5

Media Info

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

Subject/Index Terms

• TRT Terms: Force; Support piles; Waves
• Old TRIS Terms: Wave forces on structures
• Subject Areas: Design; Marine Transportation;

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