This paper presents wave information which plays a significant role in predicting responses of ships and ocean structures in a seaway, and discusses methods of application specifically for design consideration. A series of wave spectra to be used for estimating design values for the short term is developed, as well as series for the long-term (lifetime) approach. Several factors which may seriously affect the magnitude of predicted values (including extreme values) are discussed in detail,and results of numerical computations carried out on a semisubmersible-type ocean platform are presented. In the short-term response prediction approach, it is found from the results of the computations that the upper and lower bounds of responses established by using the series of wave spectra cover satisfactorily the variation of responses computed by using wave spectra measured at various oceanographic locations in the world. It is also found that the design extreme value estimated from the long-term prediction method agrees with that estimated from the short-term prediction method.

  • Supplemental Notes:
    • Paper presented at SNAME Annual Meeting, November 16-18, 1978.
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Authors:
    • Ochi, M K
  • Publication Date: 1978-9

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Filing Info

  • Accession Number: 00184803
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Report/Paper Numbers: Paper No. 2
  • Files: TRIS
  • Created Date: Jan 13 1979 12:00AM