船舶舵减摇潜力与最大舵速的关系分析

Analysis of Relationship Between Ship Rudder Anti-rolling Potential and Maximum Rudder Speed

为探究船舶舵减摇潜力与舵速的关系,将某船舶的实际船体参数引入到船舶运动模型中,利用Matlab对船舶横摇运动进行仿真。通过快速傅里叶变换(FFT)确定海浪引起船舶横摇运动的主要频率范围,在该频率范围内操舵,获得船舶在不同的舵速限制下由于操舵产生的横摇角,通过与船舶受海浪影响产生的横摇角对比,分析舵速限制下船舶在不同海况中具备的舵减摇潜力。仿真实验表明:船舶舵减摇潜力随舵速的提高而增大;在最大舵速10°/s限制下,船舶在常见的海况下都有很好的舵减摇潜力;继续增大舵速,舵减摇潜力随舵速增大的趋势变缓。

In order to explore the relationship between the rudder damping potential and the rudder speed of the ship, the actual hull parameters of a ship are introduced into the ship motion model, and the ship rolling motion is simulated by Matlab. The main frequency range of the ship rolling motion caused by the ocean wave is determined by the Fast Fourier Transform(FFT),and the steering angle is obtained within the range to obtain the roll angle generated by the ship under different rudder speed limits, and the ship is affected by the waves. The roll angle comparison is used to analyze the rudder reduction potential of the ship in different sea conditions under the rudder speed limit. The simulation experiment shows that the rudder damping potential of the ship increases with the increase of the rudder speed. Under the maximum rudder speed of 10 °/s, the ship has good rudder anti-rolling potential under common sea conditions. And the rudder speed continues to increase,the tendency of the rudder anti-rolling potential to increase with the rudder speed becomes slower.