风致振动是大型风力机发生破坏性事故的主要原因。为探究半主动控制在近海单桩风力机风致振动控制中的应用效果，基于ABAQUS有限元软件二次开发了风力机半主动控制模块，以单桩式NREL 5 MW海上风力机为研究对象，通过磁流变阻尼器对BangBang控制、改进BangBang控制及Lyapunov控制3种半主动控制算法在单桩大型风力机风致振动控制中的效果展开研究。结果表明：3种半主动控制算法均对风力机塔顶振动及塔架加速度具有显著控制效果，塔顶位移峰值分别减小21.3%，26.3%及29.6%，加速度最大值降低47.7%，59.2%及65.7%，其中Lyapunov控制算法在塔顶位移峰值及塔架加速度控制方面皆有最优效果；三种半主动控制算法均可明显改善塔壁外壁Mises应力集聚现象，分别使Mises应力最大值降低12.1%，17.2%及20.5%，同时塔壁与磁流变阻尼器的连接处会产生一定应力激增现象。

Windinduced vibration is the main cause of destructive accidents in large wind turbines. In order to explore the applicable effect of the semiactive control on the windinduced vibration control of single pile offshore wind turbine, based on ABAQUS finite element software, the semiactive control module of wind turbine is developed secondarily. Taking the single pile NREL 5 MW offshore wind turbine as the research object, the effects of BangBang control, improved BangBang control and Lyapunov control of three semiactive control algorithms on windinduced vibration control of largescale single pile wind turbine are studied through magnetorheological damper. The results show that three semiactive control algorithms all have significant control effects on the tower top vibration and tower acceleration of the wind turbine, the peak displacements of tower top are decreased by 21.3%, 26.3% and 29.6%, and the maximum acceleration are decreased by 47.7%, 59.2% and 65.7% respectively, in which the Lyapunov control algorithm has the optimal effects on the peak displacement at top of the tower and the acceleration control of the tower. Three semiactive control algorithms can significantly improve the Mises stress concentration phenomenon at the outer wall of the tower, and the maximum Mises stress values are reduced by 12.1%, 17.2% and 20.5% respectively through them. At the same time, the connection between the tower wall and the magnetorheological damper will produce a certain stress surge phenomenon.

TK83

国家自然科学基金（51976131，52006148）；上海市“科技创新行动计划”地方院校能力建设项目（19060502200）