The station keeping response of moored construction vessels, such as pipelaying barges, is an important consideration for determining operational constraints. Station-keeping is best characterized by the slow drifting 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 modeled 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 case are presented and compared with model test results.

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    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Authors:
    • Hairston, D E
  • Publication Date: 1979-4

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Filing Info

  • Accession Number: 00190248
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Files: TRIS
  • Created Date: Apr 25 1979 12:00AM