LONGITUDINAL MOTIONS OF TAUT MOORINGS

A general theory of the dynamic response of taut, elastic line buoy moorings to ocean waves was developed including the external hydrodynamic damping. A method to estimate the coefficient of skin friction on mooring lines was also developed. The range of the coefficient for the common ocean moorings was determined to be from 0.007 to 0.018. From numerical calculations for a surface-following type buoy moored with nylon rope, it was determined that the hydrodynamic damping can completely suppress resonance. In the heavily damped condition produced by large waves for relatively deep water mooring, it was found that only the upper part of the mooring line is in motion; and the dynamic tension at the buoy becomes large and proportional to the wave frequency, the 3/2 power of the wave height, and the square root of the skin friction coefficient on the mooring line, but independent of the whole length of the mooring line.

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Yamamoto, T
  • Nath, J H
  • Smith, C E
• Publication Date: 1974-2

Media Info

• Features: References;
• Pagination: p. 35-50
• Serial:
  • Journal of Waterways, Harbors & Coast Eng Div
  • Volume: 100
  • Issue Number: WW1
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Buoys; Cables; Dynamic loads; Dynamics; Mooring; Mooring cables; Single point moorings
• Old TRIS Terms: Cable dynamics
• Subject Areas: Marine Transportation; Terminals and Facilities;

Filing Info

• Accession Number: 00057049
• Record Type: Publication
• Source Agency: American Society of Civil Engineers
• Report/Paper Numbers: Paper 10321 Proceeding
• Contract Numbers: N00014-67A-0369-0007
• Files: TRIS
• Created Date: Jul 31 1974 12:00AM