基于统一模型的船舶迎浪参数横摇数值预报及其舵减摇研究

国际海事组织（IMO）正致力于第二代完整稳性规范的制定，而参数横摇一直是船舶动态完整稳性研究的热点。文章采用考虑船舶操纵性和耐波性运动耦合的统一模型对迎浪规则波下的船舶参数横摇运动进行了时域数值模拟。在时域模型中，六自由度耐波性运动辐射绕射力采用切片理论计算，并由脉冲响应函数法转化到时域。非线性回复力和入射波力采用瞬时湿表面压力积分方法计算。操纵性运动基于MMG模型，依据统一理论将操纵性与耐波性运动进行耦合计算。文中先应用简化三自由度模型对三艘集装箱船进行了参数横摇样船计算，并进行了初步的模型实验验证，依据结果对比分析了横摇惯性矩、初稳性高和方形系数对参数横摇的影响。基于统一模型分析了操纵性运动对参数横摇的影响，并进行了参数横摇舵减摇研究。

Numerical predictions of head sea parametric roll and its rudder stabilization based on the unified model

IMO has being dedicated in the development of second generation intact stability criteria. Para-metric roll is one of the hot issues in dynamic intact stability study. This paper presents a model for the simulation of parametric roll considering ship sea-keeping, maneuvering and control in regular head seas. In the real-time simulation, the frequency-domain potential terms calculated by strip theory are transferred to time-domain, and the restoring forces and wave exciting forces (FK force) are calculated non-linearly through pressure integration on instantaneous wetted surfaces. Meanwhile, maneuvering motion is calculat-ed based on the MMG Model. A simplified 3DOF model is applied to simulate parametric roll motion of three containerships with different main particulars. The influence of roll moment of inertia, GM, block co-efficient on parametric roll is analyzed. And the unified model is used to investigate the influence of ma-neuvering motion on parametric roll. Moreover, the effectiveness of rudder on stabilizing parametric roll is examined based on the unified model.