风力载荷对实船参数横摇预报的影响研究

Influence of wind load on predicting parametric rolling of real ship

参数横摇作为一种严重危害船舶安全的现象,已被国际海事组织(IMO)列为重要的稳性失效模式开展研究。集装箱船的事故报告表明,参数横摇现象发生于相对恶劣的海况条件下,且伴随相应的气象条件。由于此时风力载荷是船舶航行过程中不可忽略的因素,因而非常有必要研究其对参数横摇运动的影响。文中基于弱非线性三自由度运动模型,通过对4艘实船参数横摇响应的计算研究,发现风力载荷对于集装箱船在规则波中的参数横摇具有重要影响,对于参数横摇起促进作用。

As a highly nonlinear phenomenon and a serious hazard to the safety of the ship, parametric rolling was estimated as an important stability failure model and studied by the International Maritime Organization（IMO）. According to the accident report of container ship, the parametric rolling occurred in relatively adverse sea condition, and accompanied by corresponding weather conditions. As the wind load is not negligible to the ship during the voyage; thus, it is very necessary to carry out investigation on the effect of wind on the vulnerability of parametric rolling. In this study, a 3 DOF non-linear model is presented to study the parametric rolling of 4 real ships with wind load taken into account. The result shows that the influence of wind load is important, and the wind load seems to have a function of catalyzer to initiate parametric rolling.