T型翼主动控制策略的数值研究

目的]主动控制T型翼对船舶有着较好的纵向运动减摇效果,但最佳的T型翼主动控制策略仍未有定论,因此需对T型翼主动控制策略进行研究计算与分析。方法]首先,采用细长体理论对Wigley III船型在不同波长规则波中的纵向运动响应进行数值计算;然后,在相同航速与波浪工况下,对加装了主、被动T型翼的船舶纵向运动进行数值预报,分析不同主动控制策略的减摇效果。结果]计算结果显示:T型翼被动控制在共振区具有较好的减摇效果,长波区和短波区的减摇效果相对有限;纵摇角速度信号控制对纵摇运动和艏部运动加速度的减摇效果非常显著,但对于长波区的垂荡运动会有减益效果;船艏部运动速度信号对纵摇运动和艏部运动加速度的减摇效果较纵摇角速度信号均有10%~20%的提升,并且对垂荡运动的减摇效果也有一定提升。结论]对于T型翼的主动控制,艏部运动速度信号控制综合考虑了纵摇与垂荡这2种运动,可以实现更好的减摇效果。

The numerical study on active control strategies of T-foil

Objectives]An active control T-foil can effectively improve the longitudinal anti-rolling motion of the ship,but there is still no conclusion on what control strategy has the best anti-rolling effect.So the paper has studied and analyzed the active control strategies of the T-foil.Methods]The paper uses the slender body theory to calculate the longitudinal motion of Wigley III in regular waves of different wavelengths.Then,the damping effect of the ship with the passive and active T-foil is calculated and analyzed under the same speed and wave conditions.Results]The results show that the passive control T-foil has a good anti-rolling effect in the resonance region,however,the anti-rolling effect in the long and short wave region is relatively limited.The control with a pitch velocity signal is very effective in reducing the pitch motion and the acceleration of bow motion,but it increases the heave motion in the longwave area.The antirolling effect of bow motion velocity signal on-pitch motion and acceleration of bow motion is 10%-20%higher than that of a pitch velocity signal,and there is no reduction effect on heave motion.Conclusions]For the active control strategies of T-foil,the bow motion velocity signal can achieve a better anti-rolling effect by comprehensively considering both pitch and heave motions.