CALCULATION OF CROSS FORCES ACTING ON A SHIP AT LARGER DRIFT ANGLES

In this paper, special attention is given to the cross flow around each cross section of a ship during oblique motions with large drift angle, from lateral shifting motion to ahead motion. A distribution of bound vortices and free vortices is used to represent 2-dimensional separated flow around a ship section. The separation points are defined from velocity distributions for non-separated flow. The representation of the latest free vortex shed from a separation point at any incidence is discussed. Numerical results for a container ship hull drifting motions are presented. A comparison of the measured results of oblique towing model tests at increasing forward speed show that the calculated lateral forces and yaw moments acting on a ship agree well with the experimental results. This approach is useful for more accurate prediction of ship manoeuvrability at low speed.

• Supplemental Notes:
  • J Soc Naval Arch Japan, v 176, Dec 1994, p 251 [8 p, 23 ref, 12 fig]
• Authors:
  • TANAKA, S
  • Kijima, K
• Publication Date: 1994

Language

• Japanese

Subject/Index Terms

• TRT Terms: Hydrodynamic pressure; Maneuverability
• Old TRIS Terms: Crossflow; Hydrodynamic forces
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00710704
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM