ON THE EFFECT OF THE FORWARD VELOCITY ON THE ROLL DAMPING MOMENT

Hanaoka has presented a theory for the flow field around a ship at a constant velocity in an asymmetric motions such as rolling, yawing and swaying under the assumption of thin and low aspect ratio ship. Although there are some limitations due to these assumptions and approximations, his theory allows the side force term to be taken into consideration. In this paper, the author applies Hanaoka's theory to the estimation of the effect of the velocity on the roll damping. The theoretical formula is then transformed into a convenient form for numerical evaluation and the computed results are compared with experimental data from a model ship. This comparison indicate a good correspondence that the proposed theory seems to be adequate to predict the effect of the velocity on the roll damping moment.

• Corporate Authors:

  Ship Research Institute, Tokyo

  38-1, 6-chome, Shinkawa, Mitaka-shi
  Tokyo,   Japan 
• Authors:
  • WATANABE, I
• Publication Date: 1977-2

Media Info

• Pagination: 27 p.
• Serial:
  • Ship Research Institute, Papers of
  • Publisher: Ship Research Institute, Tokyo

Subject/Index Terms

• TRT Terms: Damping (Engineering); Flow; Flow fields; Rolling; Ship motion; Velocity
• Uncontrolled Terms: Flow velocity
• Old TRIS Terms: Roll damping
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00159537
• Record Type: Publication
• Source Agency: Ship Research Institute, Tokyo
• Report/Paper Numbers: No. 51
• Files: TRIS
• Created Date: Sep 20 1977 12:00AM