PROBABILISTIC STUDY ON SHIP CAPSISING DUE TO PURE LOSS OF STABILITY IN IRREGULAR QUARTERING SEAS

This study presents a theoretical method for calculating probabilities of capsising due to pure loss of stability for a ship running in short crested waves and fluctuating wind. The aim was to develop stability criteria of a ship in quartering seas making use of the risk analysis. The ship motions were divided into steady and unsteady motions. Then The probability density function was integrated, which is given by the steady random process theory on the safe domain that is determined by separatorices of the unsteady dynamic system. The reduction of restoring moment when a wave crest moves into the centre of gravity of the ship is fully considered by Grim's effective wave concept. Numerical examples are shown for a coastal trawler.

• Supplemental Notes:
  • STAB 90, Stability of Ships & Ocean Vehicles; 4th Intl Conf; 24-28 Sept 1990; Naples, Italy. Sponsored & Publ by Dept. Naval Engng, Univ. Naples et al. Procs, v 1, p 328 [8 p, 19 ref, 1 tab, 14 fig]
• Authors:
  • Umeda, N
  • Yamakoshi
  • Y Tsuchiya, T
• Publication Date: 1990

Language

• English

Subject/Index Terms

• TRT Terms: Capsizing; Stability (Mechanics)
• Uncontrolled Terms: Probabilistic methods
• Old TRIS Terms: Quartering seas
• Subject Areas: Marine Transportation; Safety and Human Factors;

Filing Info

• Accession Number: 00700801
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM