Abstract
This paper presents a brief outline of dynamic stability of a damaged ship at final stage of flooding in rough beam wind and waves. One degree-of-freedom, roll equation is adopted with effects of flooding water and external forces due to wind and waves, but without effect of sloshing. We discuss the dynamic stability of the damaged ship in terms of capsizing probability based on risk analysis, the method of which was firstly proposed by Umeda et al.[6] to high speed craft in intact condition. As a result, we can evaluate the dynamic stability of the damaged ship in probabilistic manner according to sea state, operating condition and damage situation.
본 연구는 손상된 선박의 최종 평형 상태에서의 동적 안정성에 관한 내용을 담고 있다. 먼저 1자유도 횡동요 운동방정식에 침입수의 영향과 횡풍 횡파의 영향을 적절히 고려하여 손상선박의 횡동요 응답을 구하였으며, 신뢰성공학적 수법을 이용하여 손상선박의 전복확률의 계산법을 정립하였다. 연구결과 해상상태, 운항상태 그리고 손상상태에 따른 동적 안정성을 확률론적으로 평가할 수 있었다.