转舵速度对舰船回转性能的影响

Effects of steering speed on the turning performances of ships

在忽略操舵引起速降的假设前提下,利用操舵响应方程对不同转舵速度下船舶的回转性能进行理论分析,获得定常回转直径、纵距、横距、战术直径等参数与转舵时间之间的近似关系。进而利用计及速降的非线性操纵性运动方程进行同一舰船不同转舵速度下的回转运动仿真,以及操纵性能和航速相同而船长不同的各船在不同转舵速度下的回转运动仿真。仿真结果与理论分析结果一致,均表明定常回转直径不受转舵速度的影响,纵距、横距、战术直径均随着转舵速度的提高而减小,且转舵速度对船长较短的舰船影响较大。

By assuming that steering would not cause the drop in ship velocity, this paper applies K-T formula to analyze the turning performances of ships under different steering speeds, and finally reveals the relationships between the diameter, advance, transfer, tactical diameter and steering time. Using non-linear maneuvering equation, numerical simulations of turning motion with different steering speed are first conducted for a certain ship, and the counterpart for ships with the same turning performances and velocity but different length are then presented. The results from theoretical solution and numerical simulation both indicate that the diameter does not change with steering speed, but advance, transfer, tactical diameter all decrease with the increase of steering speed; moreover, the shorter the ship is, the more notable the effect will be.