NEAR OPTIMAL BALLAST DISTRIBUTION IN SEMISUBMERSIBLES THROUGH LINEAR PROGRAMMING

The design of semisubmersible drilling vessels must consider static stability over a wide range of drafts and vessel loading conditions to insure an acceptable design. Partitioning of the lower hulls must consider static stability to arrive at an economical but viable design. Perhaps of most importance are the limits imposed on variable loads by static stability requirements. The ballast must then be distributed not only to bring the vessel to the desired draft at zero trim and zero heel, but also the resulting k sub g must be less than the maximum allowed for stability at that draft. These considerations require that for a given variable loading condition, the ballast be distributed to obtain the lowest possible corrected vertical center of gravity. A linear programming method of determining ballast distribution is described.

  • Supplemental Notes:
    • Presented at the 6th Annual Offshore Technology Conference, Houston, Texas, May 6-8, 1974.
  • Corporate Authors:

    Offshore Technology Conference

    6200 North Central Expressway
    Dallas, TX  USA  45206
  • Authors:
    • Young, F M
    • Scales, R
  • Conference:
  • Publication Date: 1974-5

Media Info

  • Features: References;
  • Pagination: p. 841-848
  • Serial:
    • Volume: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00080007
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: OTC #2025
  • Files: TRIS
  • Created Date: May 1 1975 12:00AM