WAVE FORCES ON A RESTRAINED SHIP IN HEAD-SEA WAVES

The exact ideal-fluid boundary-value problem is formulated for the diffraction of head-sea regular waves by a restrained ship. The problem is then simplified by applying four restrictions: (1) the body must be slender; (2) the wave amplitude is small; (3) the wave length of the incoming waves is of the order of magnitude of the transverse dimensions of the ship; and (4) the forward speed is zero. The problem is solved by using matched asymptotic expansions. The result shows that the wave is attenuated as it propagates along the ship. The result is not expected to be valid near the bow or stern of the ship. The experimental and theoretical pressure distribution along a prolate spheroid have been compared. The predicted attenuation of the peak pressure is very well confirmed by the experiments. In addition, theory and experiment agree that the peak pressure near the ship generally leads the Froude-Kriloff-pressure peak by 45 degrees.

• Corporate Authors:

  Nor Veritas

  Oslo,   Norway 
• Authors:
  • Faltinsen, O M
• Publication Date: 1973-3

Media Info

• Features: References;
• Pagination: 42 p.
• Serial:
  • Nor Veritas Publication
  • Issue Number: 80
  • Publisher: Nor Veritas

Subject/Index Terms

• TRT Terms: Force; Mooring; Ships; Thinness; Waves
• Old TRIS Terms: Moored vessels; Regular waves; Slender bodies; Thin ship theory; Wave forces on structures
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00054048
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: May 7 1974 12:00AM