THE VESSEL IN PORT: MOORING PROBLEMS

Discussed are problems concerning safe mooring of ships in port, comprising environmental forces applied to the ship, general principles that determine how the applied forces are distributed to the mooring liens, and application of these principles to establish a good mooring arrangement. Issues addressed include an overview of good mooring principles, guidance for berth layout and shipboard mooring equipment, and prediction f wind and current loads on the ship. Emphasis is placed on computer prediction techniques to assess effects of moored ship dynamics caused by the natural seaway. As an example, calculated maximum surge excursions of a large tanker moored to an exposed jetty and subject to the action of long-crested natural seaways are presented for seastates having significant wave heights of up to 5m and zero-upcrossing periods of up to 11.6s. Restoring force characteristics in surge were assumed linear. Representative restoring force constants ranging from 52 to 148s. Frequency domain analyses were performed using spectral expressions of wave drift force. Expected maximum surge motions of the moored tanker are plotted as functions of significant wave height.

  • Supplemental Notes:
    • Marine Structures, v 8 n 5, 1995, p 451 [29 p, 46 ref, 9 fig]
  • Authors:
    • Schellin, T E
    • Ostergaard, C
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00710959
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Aug 14 1995 12:00AM