船舶操纵运动数学模型预报精度的研究

Improvement on precise prediction of ship manoeuvring mathematical model

借助实船操纵性试验数据库，对船舶操纵运动数学模型进行了大量的仿真比较研究，发现纵向阻尼水动力导数Ｘ′ｒｒ，直航时舵处伴流系数ωＲ０，舵处整流系数γ对预报精度有很大的影响，因此利用实船操纵性试验结果，并以单纯形法对上述三个参数进行寻优，从而提高了仿真预报的精度．

Based on the database of full scale ship manoeuvring trial, a large number of simulation researches on the ship manoeuvring mathematical model are made. It is found that the lonitudinal componet coefficient X′ rr , the wake fraction coefficient ω R0 and the flow strightening coefficient γ obviously affect the ship manoeuvring prediction performance. Finally, the optimum seeking with the Single shape Method for above three coefficients is made.