波浪中船舶操纵性预报

为实现对全回转桨船操纵性的预报，根据船舶分离型运动模型的建模方法，考虑全回转桨在水平面上周转的灵活性与受力的特殊性，着重分析双桨受力，建立适用于全回转对转桨船模的MMG操纵运动数学模型；模拟船模进行PMM运动，求得水动力导数并采用四阶龙格-库塔法对操纵性常微分方程进行求解；对某工程船在静水中的回转运动和Z形操纵运动进行数值仿真预报，并将预报结果与自航模操纵性试验结果进行对比。
结果表明，两者吻合度较高，验证了针对全回转对转桨船模所建立的船舶运动数学模型的有效性，可为全回转桨船的操纵性预报提供一种较为可靠且行之有效的方法。

The prediction on ship manoeuvring performance in wave

To predict the maneuverability of full-revolving propeller ships, this paper analyzes the propeller force and establishes MMG equations for controlling motion mathematical models that are suited to the full-revolving propeller model, in accordance with the modeling method of the separating ship motion model and taking into account the special nature of the force and flexibility of a full rotation in the horizontal plane of a full-revolving propeller. Secondly, hydrodynamic force derivatives for the ship model are obtained by simulating the model's PMM movement, and the controlling Ordinary Differential Equation (ODE) is solved using the four-stage Rung-Kuta method. Finally, the numerical simulation of a certain ship's rotating motion and its zigzag test in still water is obtained, and the prediction results are compared with that of a self-running model.
It is found that the simulation results agree well with the trial results, and the effectiveness of the ship motion model for the full-revolving propeller model is validated. In brief, this paper provides a reliable and effective method of predicting the maneuverability of full-revolving propeller ships.