ON THE MOORING OF FLOATING OFFSHORE STRUCTURES IN SHALLOW, UNPROTECTED WATERS

Mooring of floating offshore structures in shallow, unprotected waters presents some unique problems, e.g. the occurrence of highly peaked line tensions. This is usually a consequence of limited allowable horizontal movement of the moored vessel on the one hand and the action of waves extending into the region of rapidly increasing nonlinear mooring restoring forces on the other. Moreover, in shallow waters elasticity of mooring lines becomes important and must be included in the analysis. Methods of analysis in both time and frequency domain are presented. Both first and second order wave forces are treated as functions of water depth. Because of their important influence on mooring system performance, second order wave <drift> forces are determined from model tests and compared with calculated results. Sample analyses are carried out of a crane vessel moored in 20 m water depth and of a barge type deck structure positioned in three different water depths.

  • Supplemental Notes:
    • Jahrbuch der Schiffbautechnischen Gesellschaft, 76 <1982>, p.533 (34 pp., 33 ref., 3 tab., 23 graphs, 2 diag.)
  • Authors:
    • Schellin, T E
    • Clauss, G F
  • Publication Date: 1982

Language

  • German

Subject/Index Terms

  • Subject Areas: Marine Transportation;

Filing Info

  • Accession Number: 00685882
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Aug 14 1995 12:00AM