EVALUATION OF SMALL VESSELS' ROLL MOTION STABILITY RESERVE FOR RESONANCE CONDITIONS

The purpose of this paper is to evaluate the stability of a ship in waves. The ship is assumed to satisfy the IMO stability standards. For this condition, the work of the upsetting moments due to wind and waves were calculated and compared with the work done by the ship's righting moment at a given angle of heel. The difference between the two values of work is the stability margin that is used to assess ship stability safety in waves. To predict the effect of the upsetting moments in terms of the roll angle, a nonlinear roll motion equation is derived and solved. A procedure for calculating the terms of the equation is also suggested. The calculated stability margin can be used as a relative measure of stability safety for ships rolling in waves.

Media Info

  • Features: References;
  • Pagination: 17p.

Subject/Index Terms

Filing Info

  • Accession Number: 00659030
  • Record Type: Publication
  • Source Agency: Maritime Technical Information Facility
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM