【作者】 杨洲城；

【导师】 金鸿章；

【作者基本信息】 哈尔滨工程大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 近年来，人们对船舶横摇稳定性的要求越来越高，既要求在航行中减摇，也要求在停泊或漂流状态下减摇，尤其是大型游艇、具有舰载武器的军用舰船、科考船以及其它一些进行海上作业的特种船舶。一直以来，减摇水舱是船舶在零航速下减摇的唯一选择，但是减摇水舱的整体减摇效果并不是很理想，仅有50％左右；而减摇鳍虽然在高航速下的减摇效果非常理想，但是在低航速和零航速情况下几乎无法减摇。对于既要求高航速下减摇也要求零航速下减摇的舰船来说，就需要同时安装两种减摇系统，高航速下使用减摇鳍减摇，低航速和零航速时用减摇水舱减摇。虽然这种方法优点很明显，但这就意味着需要设计和维护两套系统，不但增加了成本，而且会占用更多的船舶内部空间。如果减摇鳍可以在低航速和零航速下进行减摇，就可以只设计和维护一套系统，而且不会占用更多的内部空间。它的优点是很明显的，因此研究零航速下减摇鳍升力产生的原理并建立升力模型是很重要的。本文参考国内外相关文献，研究零航速减摇鳍的工作原理，分析零航速下减摇鳍按加速—匀速—减速运动时升力产生的机理，并与减摇水舱的工作原理和减摇性能进行比较。介绍Weis-Fogh机构的流体动力学知识及其理论模型，根据昆虫“振翅拍击和挥摆急动”过程瞬时产生升力的原理和势流理论建立和分析零航速减摇鳍的升力模型。根据建立的升力模型，给定一系列输入信号，使鳍按匀速、匀加速、匀减速、阶段输入和正弦规律旋转张开并运用Matlab软件编程进行仿真得到升力变化规律。通过比较仿真结果得出零航速减摇鳍按正弦运动方式转动最适合在零航速下减摇。更多还原

【Abstract】 In recent years, people pay more and more attention to and make increasing demands of the roll stability of ships, not only sailing but also anchoring and drifting, especially large motor yachts, warships carrying weapons, research vessels and other vessels for special operations at sea.Anti-roll tank system is the only choice for ship to reduce roll under zero speed, but the effect is not very good, it can only reach to 50% under all conditions. Fin stabilizer can reduce the most roll of the ship under high speed, but it hardly reduces the roll of the ship under low speed or zero speed. The ship which needs to reduce the roll under all kinds of ship speed has to equip two pair of anti-roll systems: fin stabilizer and anti-roll system to meet the need. The advantage is obvious, but it means that there are two systems to design and maintain. Two systems not only occupy more inner space of the ship but also increase the cost. If fin stabilizer can reduce the roll of the ship under low speed and zero speed, it means that there is only one pair of system to maintain and doesn’t need more inner space of the ship. So it is important to research and analyze the lift which generates by the movement of the fin and build a lift model of the fin.This thesis mainly explains the work principle of zero-speed fin stabilizer and analyzes the reason why the zero-speed fin stabilizer can supply the lift according to the foreign references. Then compare with the principle and capability of the anti-roll tanks.Introduce hydrodynamics and theoretical models of Weis-Fogh mechanism. Lift model of the zero-speed fin stabilizer is built and analyzed according to Weis-Fogh mechanism’s hydrodynamics and theoretical models.A series of signal is input including even speed, accelerate and decelerate. Matlab is used to simulate the lift of the zero-speed fin stabilizer with some different input signal. The result indicates that the zero-speed fin stabilizer can reduce roll under zero speed with sine wave input signal.更多还原