FORCE AND MOMENTS ON ASYMMETRIC AND YAWED BODIES IN A FREE SURFACE

Thin bodies with a small degree of asymmetry are assumed to travel with a constant forward speed in the free surface of an infinitely deep ideal fluid. The boundary-value problem for the velocity potential due to asymmetry is derived and its solution formulated in terms of Fredholm integral equations. A numerical scheme based on the finite-element method is developed and applied for two cases of length/draft ratios, namely 7 and 20, at different Froude numbers. Graphs of side force, added-resistance, heeling- and yawing-moment coefficients are presented as functions of Froude numbers. (Modified author abstract)

• Corporate Authors:

  University of California, Berkeley

  College of Engineering
  Berkeley, CA  United States  94720
• Authors:
  • Daoud, NAH
• Publication Date: 1973-5

Media Info

• Pagination: 78 p.

Subject/Index Terms

• TRT Terms: Boundary value problems; Engineering moments; Finite element method; Force; Free surface; Green's function; Hulls; Hydrodynamics; Integral equations; Numerical analysis; Numerical integration; Perturbation theory; Potential flow; Ship motion; Yaw
• Uncontrolled Terms: Ship hulls
• Old TRIS Terms: Force mechanics; Fredholm equations; Free surface effects; Moments
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00048403
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NA-73-2 Tech Rpt
• Contract Numbers: N00014-69-A-0200-102
• Files: TRIS
• Created Date: Nov 14 1973 12:00AM