ASSESSMENT OF STABILITY REQUIREMENTS FOR SEMISUBMERSIBLE UNITS

The development of the presently required stability criteria for semisubmersible platforms is traced, and the lack of rigor embodied therein is indicated. Results of a recent two-year research program directed by SNAME Panel MS-3 on stability behavior of semisubmersibles are presented in detail. Conclusions are drawn that the present criteria which emphasize overturning are inappropriate, and that even with high winds and maximum seas the possibility of overturning is minimal. The major needs for adequate stability are indicated to be for lessening the possibility of wave impact on the upper structure in heavy weather, and for minimizing motions due to secondary effects in operating conditions. Various factors that may influence the assignment of required stability for a semisubmersible are discussed. Further research into the stability-behavior relationship and toward improved evaluation of wind heel is outlined.

  • Supplemental Notes:
    • Presented at SNAME Annual Meeting, New York, N.Y., November 11-13, 1976.
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  USA  07306-2907
  • Authors:
    • Numata, E
    • Michel, W H
    • Mcclure, A C
  • Publication Date: 1976

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Filing Info

  • Accession Number: 00189445
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Files: TRIS
  • Created Date: Apr 25 1979 12:00AM