DYNAMIC ANALYSIS OF DEEP WATER PLATFORMS USING AN ENHANCED MODAL METHOD

A variety of analytical methods has been developed for fixed offshore platforms, ranging from the choice of a simple global magnification factor to the use of complex spectral analysis techniques which treat the sea state as a random process quantifiable only in statistical terms. The former, while simple to apply, offers a poor model of the actual physical process, e.g. inertia effects of the deck ignored. The latter, while offering the theoretically most satisfying solution is as yet difficult to apply in practice due to prohibitive computer costs and the lack of suitable computer packages. This paper describes a method which has been developed in an effort to meet the needs of a deterministic dynamic analysis from which detailed member stresses are required, and which can be carried out at reasonable cost while producing results which can be readily integrated into existing design procedures. The application of the method is illustrated by means of a simplistic modal method.

• Supplemental Notes:
  • Procs. of 3rd International Symp. on Offshore Engineering, held at COPPE, Federal University of Rio de Janeiro, Brazil, 14-18 Sept. 1981 Vol. 3, Part 3, p. 395 (19 pp., 11 ref., 2 tab., 2 graphs, 2 diag.)
• Authors:
  • Cronin, D J
  • Galgoul, N S
• Publication Date: 1981

Language

• English

Subject/Index Terms

• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00686104
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM