FREE VIBRATIONS OF TAUT AND SLACK MARINE CABLES

The natural frequency and damping of several typical marine cables were measured in air and in water and are reported in this paper. The changes in natural frequency and mode shape that occur in both media as the cable sags from a taut configuration are in agreement with a recently developed linear theory. A modal "crossover" predicted by the theory was also observed as the cable tension was decreased. The onset of the catenary behavior has been identified and it coincides with at least an order of magnitude increase in the structural damping of the cables. The fluid dynamic contributions to the virtual mass and the damping are found to be independent of the sag in the cable and are comparable to measurements for taut cables reported in the literature.

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Ramberg, S E
  • Griffin, O M
• Publication Date: 1977-11

Media Info

• Features: References;
• Pagination: 14 p.
• Serial:
  • Journal of the Structural Division
  • Volume: 103
  • Issue Number: 11
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Bridge design; Bridges; Cables; Cyclone separators; Damping (Physics); Dynamics; Fluid dynamics; Mass; Mooring cables; Moorings; Natural frequency; Seawater; Ships; Structural design; Tension; Testing; Vehicle components; Vibration; Wire rope
• Uncontrolled Terms: Natural frequencies
• Old TRIS Terms: Anchor cables; Cable dynamics; Marine cables; Ship equipment
• Subject Areas: Bridges and other structures; Highways; Marine Transportation; Terminals and Facilities; Vehicles and Equipment;

Filing Info

• Accession Number: 00170121
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Mar 7 1978 12:00AM