ANOMALIES IN THE RESPONSE OF SEMISUBMERSIBLES

This paper describes how two model basins, testing the same semisubmersible design, produced different motion response results. Subsequent testing revealed the phenomena that the heave response of the model is extremely sensitive to small changes in wave period. Calculations show that over- simplification of the heave response can produce significant overestimates of actual heave values, and, hence an overestimate of weather downtime that a drilling vessel will experience. It can be concluded that detailed model tests are very important for the accurate determination of vessel performance.

• Supplemental Notes:
  • Offshore Technology Conference 8th Annual, Proceedings, Houston, Texas, May 3-6, 1976.
• Corporate Authors:

  Offshore Technology Conference

  6200 North Central Expressway
  Dallas, TX  United States  45206
• Authors:
  • Springett, C N
  • Chen, K K
  • Beiwer, F N
• Conference:
  • Offshore Technology Conference 8th Annual, Proceedings, Houston, Texas, May 3-6, 1976.
• Publication Date: 1976-5

Media Info

• Features: References;
• Pagination: p. 861-872

Subject/Index Terms

• TRT Terms: Offshore drilling platforms; Performance; Semisubmersibles
• Uncontrolled Terms: Heaving
• Old TRIS Terms: Drilling platform performance; Heave response
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00144283
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: V1, OTC 2506 Proceeding
• Files: TRIS
• Created Date: Jan 16 1977 12:00AM