The paper describes a new types of offshore tanker terminal and the related specially developed method of analysis of its dynamic behavior. The system, called articulated leg mooring system "ARLEMS" is an improved single point mooring buoy capable of mooring large tanks and of withstanding severe meteorological-oceanographic conditions. It is essentially formed of an upper structure supporting the rotating table, connected to a basement standing on the sea bottom, by three tubular legs. Two cardan joints at the ends of each leg allow the upper structure to move horizontally. The advantages of such a system, as well as those of the particular kinematics, are examined in detail. The important role played by cardan joints is pointed out. Two basic configurations of the system, the "buoyant body buoy" and the "buoyant legs buoy" and their basic applications are outlined. A computer program solving nonlinear equations by a step-by-step integration technique has been developed; movements of the buoy, as well as loads on the bow hawser, on the legs and on the joints, are evaluated for two typical water depths; 27.5 meters for the "buoyant body buoy" and 105 meters for the "buoyant legs buoy."

Media Info

  • Features: References;
  • Pagination: p. 141-158

Subject/Index Terms

Filing Info

  • Accession Number: 00167652
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: V2, OTC2825 Proceeding
  • Files: TRIS
  • Created Date: May 18 1978 12:00AM