PREDICTION OF SHIP ROLL, SWAY AND YAW MOTIONS IN OBLIQUE WAVES

A theoretical model is developed for the prediction of ship lateral motions in oblique seas. The asymptotic behavior of this model in waves that are long relative to ship beam is examined, with particular emphasis on the classical problem of rolling in beam seas. The theoretical prediction of roll damping is discussed, and the importance of including dynamic lift on appendages is emphasized. Fairly extensive comparisons of predicted and measured roll response are made, with good agreement at all headings considered. (Author)

• Corporate Authors:

  Defence Research Establishment, Dartmouth

  Dartmouth, NS,   Canada 
• Authors:
  • Schmitke, R T
• Publication Date: 1977-9

Media Info

• Pagination: 69 p.

Subject/Index Terms

• TRT Terms: Aerodynamic lift; Coefficients; Damping (Engineering); Damping (Physics); Eddy currents; Equations of motion; Hulls; Mathematical models; Mathematical prediction; Ocean waves; Rolling; Seakeeping; Ship motion; Simulation; Yaw; Yaw
• Uncontrolled Terms: Ship hulls
• Geographic Terms: Canada
• Old TRIS Terms: Roll; Roll damping; Roll response
• Subject Areas: Data and Information Technology; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00176075
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: DREA-77/4
• Files: TRIS
• Created Date: Jul 19 1978 12:00AM