MOSAS: A MOTION AND STRENGTH ANALYSIS SYSTEM FOR SEMISUBMERSIBLE UNITS AND FLOATING STRUCTURES

A realistic approach to analyzing a floating unit is to elaborate statistically motion and stress-transfer functions for regular waves, using measured wave-energy spectra. Accurate determination of the transfer functions is therefore of utmost importance. This paper presents a computer program in which all necessary computations have been integrated into one all-embracing system. For reasons of efficiency, the program is divided into two parts. The motions part is comprised of the calculation of all quantities of the motion equations and the solution thereof. In the second part, all loading data and structural data are collected, after which a space-frame analysis program is applied to determine stresses. The paper elucidates the structure of the program and its theoretical backgrounds, of which the use of potential theory for computing wave forces is perhaps the most important.

• Supplemental Notes:
  • Presented at the 6th Annual Offshore Technology Conference, Houston, Texas, May 6-8, 1974. Requests for this paper should be directed to David L. Riley, Offshore Technology Conference.
• Corporate Authors:

  Offshore Technology Conference

  6200 North Central Expressway
  Dallas, TX  United States  45206
• Authors:
  • van Opstal, GHC
  • Hans, D
  • Salomons, J W
  • van der Vlies, J A
• Conference:
  • Presented at the 6th Offshore Technology Conference
  • Location: Houston Texas
  • Date: 1974-5-6 to 1974-5-8
• Publication Date: 1974-5

Media Info

• Features: References;
• Pagination: p. 721-738
• Serial:
  • Volume: 2

Subject/Index Terms

• TRT Terms: Force; Offshore platforms; Semisubmersibles; Ship motion; Structural analysis; Waves
• Old TRIS Terms: Floating platforms; Wave forces on structures
• Subject Areas: Bridges and other structures; Marine Transportation; Materials; Vehicles and Equipment;

Filing Info

• Accession Number: 00072893
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: OTC #2105 Paper
• Files: TRIS
• Created Date: Jan 16 1975 12:00AM