ON THE MOTION RESPONSES OF OFFSHORE FLOATING STRUCTURES IN DIRECTIONAL SPECTRA WAVES: THE 1ST-ORDER RESPONSES

Model tests of a semisubmersible that were conducted in directional spectra waves generated by a new snake-type wave maker installed in the towing tank of Yokohama National University are described. Motion responses of the moored semisubmersible ITTC model were measured in various kinds of short-crested irregular waves that had specified power spectra and directional distribution functions. The first-order motion responses in the wave frequency range were estimated by the linear superposition theory using directional wave spectra and transfer functions in oblique waves. Good agreement between measured and estimated responses was obtained for waves with both wide and narrow spreads. The influence of the directional spreading function and principal wave direction on the short-term prediction of motions was also investigated and some examples are presented.

  • Availability:
  • Supplemental Notes:
    • Journal article
  • Authors:
    • Takezawa, S
    • Kobayashi, K
  • Publication Date: 1989-6

Language

  • Japanese

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00658309
  • Record Type: Publication
  • Source Agency: Maritime Technical Information Facility
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM