MOTIONS OF SMALL BOATS MOORED IN STANDING WAVES

Objective of research was to determine dynamic characteristics of small boats moored with non-linear elastic lines in an asymmetrical manner. Only surge motions considered. The author proposes an analytical model and develops a method for obtaining the non-linear restoring forces and dynamic response of the boat in surge. The restoring force is defined by the material, condition, dimensions and geometry of the mooring lines. Analytical results are compared to experiments conducted on a 26-foot boat with a displacement of 7,000 lb. Good correlation was found. An analytical survey was then conducted on seven boats of various weights to evaluate the range of important wave periods. Experiments were then conducted to determine the effect on moored boat response of flotation chambers which are used on some floating slips. They were found to act as breakwaters.

• Corporate Authors:

  California Institute of Technology

  WM Keck, Laboratory of Hydraulics and Water Resources
  Pasadena, CA  United States 
• Authors:
  • Raichlen, F
• Publication Date: 1968-8

Media Info

• Pagination: 158 p.

Subject/Index Terms

• TRT Terms: Mooring cables; Pleasure craft; Ship motion; Surges (Fluid mechanics); Water waves
• Uncontrolled Terms: Small craft
• Old TRIS Terms: Surge
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Terminals and Facilities; Vehicles and Equipment;

Filing Info

• Accession Number: 00044445
• Record Type: Publication
• Source Agency: National Maritime Research Center, Galveston
• Files: TRIS
• Created Date: May 23 1973 12:00AM