선미파, 선미사파를 받는 선박의 과도 운동에 영향을 주는 요인 분석

Abstract

Recently, researches have been conducted by ITTC to find rational mathematical model for prediction of capsizing. According to this research movement, Lee’s mathematical model(1997), which describes 6 DOF transient motions such as capsizing of a ship in regular waves is modified, and a mathematical model for prediction of capsizing in following and quartering seas is suggested. Based on the suggested model, factors affecting prediction accuracy of capsizing are analyzed through comparing simulation results with experimental results. Simulation results are compared with ITTC bench mark test results. The prediction of capsizing events shows good agreement with ITTC bench mark test results in case of rolling tests in beam seas and free running tests in stern quartering seas, even though calculated roll angles are larger than those of experimental results. With the simulation results, it is found that the effect of nonlinear manoeuvring terms on the prediction of capsizing events is negligible. Although consideration of skeg effect on manoeuvring coefficients could decrease roll amplitudes, histories of roll motions still have large differences from experimental results.