The station-keeping response of a moored construction vessels, such as pipelay barges, is an important consideration for determining operational constraints. Station-keeping is best characterized by the slow drifing motions of the vessel within the constraints of the mooring system. This paper presents an analysis to evaluate the dynamics of an offshore construction barge moored by a system of single-component cables in deep seas subjected to arbitrary time-varying external forces such as waves, wind and current. The vessel is mathematically modelled as a rigid body with a discrete point of attachment for each mooring line. Each mooring line is treated as a single-component cable terminating at a gravity-type anchor. The limiting tensions for each cable in complete and partial catenary configurations are determined from the cable strength and anchor holding capacity. The effects of system damping and cable stretch are included. Numerical results obtained for a typical cases are presented and compared to model test results.

  • Supplemental Notes:
    • Presented to SNAME, New Orleans, Louisiana, January 19, 1978.
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Authors:
    • Hairston, D E
  • Publication Date: 1978

Media Info

  • Features: References;
  • Pagination: 26 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00173985
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Files: TRIS
  • Created Date: May 3 1978 12:00AM