港内船舶低速航行时的舵效

Rudder effect of slow-speed ships in harbor

为研究船舶在停车淌航时的舵效,采用MMG建模方法,将常速域和低速域数学模型相结合,建立适于港内船舶运动的数学模型,并考虑浅水、低速、漂角等因素的影响,利用MATLAB软件进行算法实现.对三种船型在港内停车淌航时的舵效进行仿真,通过对仿真结果的分析与比较,得出影响舵效的系列结论;同时,综合专家意见,得出三种船舶有舵效的最低速度,可为驾引人员在实际工作中提供参考.

To study the rudder effect of the ship when engine stops,ship maneuvering mathematical model of MMG was used,and a mixed model combining normal speed model with low speed model was presented,which being suitable for ship＇s motion in harbor including shallow water,low speed,small and large drift angle.The algorithm of ship＇s motion was programmed by using Matlab.Three types of ship＇s rudder effect in harbor were simulated when the engine stops,and a series of conclusions that impact the rudder effect were acquired.At the same time,the minimum steering speeds of three types ships were also obtained by integrating the experts opinions,which can give reference to the navigator in practical work.