DIRECTIONAL SEA STATE CRITERIA FOR DEEPWATER GULF OF MEXICO COMPLAINT TOWERS

Directional sea state criteria have been developed for deepwater compliant towers which accommodate for the fact that the loading intensity of extreme Gulf of Mexico storms and their resulting structural responses change with direction. The methodology used results in a more consistent approach to establish structural strength (in different directions) relative to the preferred directions of extreme storms. The development of the directional criteria begins with the hurricane hindcast database which allows for the estimation of the probability distribution of a target structure's response as a function of direction. The most likely response as a function of direction to occur in a 100 years is defined as the "Design Target". Then a realistic combination of sea state parameters is chosen for a particular number of directions. A series of sea state and target structure response simulations are then created for each direction using each direction's criteria. Any simulation containing responses at the Design Target legal becomes a potential "design record". Ultimately, a "Designer Wave" record made up of a short portion of a design record is selected for each direction and must reproduce that direction's Design Target response on the target structure.

  • Supplemental Notes:
    • OMAE 1995, 14th Intl Conf on Offshore Mechanics & Arctic Engng; 18-22 June 1995; Copenhagen, Denmark. Sponsored by ASME et al. Procs. Publ by ASME, ISBN 0-7918-1306-1. Vol I, Pt A, p 45 [11 p, 18 ref, 7 tab, 11 fig]
  • Authors:
    • Leonard, J S
    • Morrison, D G
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717684
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM