STUDY ON LATERAL MOTIONS OF A SHIP IN WAVES BY FORCED OSCILLATION TESTS

The coefficients of equations of motion were determined by the forced oscillation technique, as a step of improvement of the calculation of lateral motion: namely, sway, yaw and roll, of a ship in waves. The effects of frequency, advance speed and bilge keels on ship motions were clarified experimentally. The experimental values were compared with the calculated ones by the strip method. For the main terms of sway, yaw and roll, except roll damping terms, the both show fairly good agreement. For the coupling terms of sway-yaw, yaw-roll and roll-sway, the both also show comparatively good agreement. It is pointed out that some proper method should be developed for the approximation of the effects of viscous damping, advance speed, bilge keels and frequency of motion to obtain better prediction of the roll damping term. (Author)

• Corporate Authors:

  Mitsubishi Heavy Industries Limited

  5-1 Marunouchi, 2-chome, Chiyoda-Ku
  Tokyo 100,   Japan 
• Authors:
  • Fujii, H
  • TAKAHASHI, T
• Publication Date: 1973-8

Media Info

• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Bilges; Damping (Engineering); Damping (Physics); Equations of motion; Hulls; Merchant vessels; Ocean waves; Oscillation; Rolling; Ship motion; Ships; Stability (Mechanics); Structural models; Yaw
• Uncontrolled Terms: Lateral stability; Merchant ships; Ship hulls; Ship models
• Geographic Terms: Japan
• Old TRIS Terms: Bilge keels; Oscillation | damping; Roll; Roll damping; Ship stability
• Subject Areas: Bridges and other structures; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00051746
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: MTB-87 Tech Bull
• Files: TRIS
• Created Date: Mar 25 1974 12:00AM