风帆助航船舶运动模型
Motion model of sail-assisted ship

分析了处于复杂环境下的风帆受力,给出了风帆在最佳攻角下的受力函数。基于船舶运动与主机转速之间的耦合关系,得出了船舶主机输出转矩与油门杆位置的拟合函数。以76 000 DWT大型远洋散货船“文竹海”号为研究对象,根据实船参数建立了4自由度的风帆助航船舶运动模型。仿真结果表明:添加风帆后船舶速度增大,横摇角减小,但偏航增加。添加风帆后,在相同时间内船舶行驶的里程、最佳攻角下的船速与横摇幅度都随风速的增大而增大,但横摇角小于15°,在安全范围之内。可见,船舶运动模型符合实际船舶运动规律,是有效的。
The forces of sail in complex environment were analyzed, and the force functions of sail under the best attack angle were obtained. Based on the coupling relationship between ship motion and ship main diesel engine revolution, the fitting function of main diesel engine output torque and throttle lever position of ship was deduced. 76 000 DWT large ocean-going bulk ship ‘Wenzhuhai’ was taken as research object, a sail-assisted ship motion model with four degrees of freedom was constructed based on real ship parameters. Simulation result shows that after adding sail, ship speed increases and roll angle decreases, but ship yaws more. Ship journey in the same time, ship speed under the best attack angle, and roll amplitude increase with the increase of wind speed after adding sail. Roll angle is less than 15° within safe range. Analysis result is consistent with the motion laws of real ship, so the model is effective. 1 tab, 15 figs, 25 refs