抑制海上浮式风力机振动的TMD限位策略研究  

TMD limited position strategy for vibration suppression of floating offshore wind turbines

作　　者：杨佳佳 贺尔铭[1] 姚文旭 熊波 YANG Jiajia;HE Erming;YAO Wenxu;XIONG Bo(School of Aeronautics,Northwestern Polytechnic University,Xi’an 710072,China)

机构地区：[1]西北工业大学航空学院,西安710072

出　　处：《振动与冲击》2020年第15期18-24,57,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(51675426)。

摘　　要：调谐质量阻尼器(TMD)能有效抑制海上浮式风力机的振动响应。风浪作用下,TMD将产生较大的振幅,和风机结构发生碰撞,严重影响风机结构安全,故必须对TMD进行限位设计。针对此问题,在Barge式风力机机舱中配置TMD,提出了3种TMD限位策略:阻尼限位策略、刚度限位策略及联合限位策略。采用拉格朗日方程,建立TMD行程受限的海上浮式风力机3自由度动力学模型,研究了不同限位策略下TMD的抑振效果。结果表明:采用联合限位策略,可以避免单一限位策略的缺陷,此时,TMD最大行程为7.85 m,对塔顶纵向位移和平台纵摇角标准差的抑制率分别为40.01%和61.78%。Tuned mass dampers(TMDs)can effectively reduce vibration responses of floating offshore wind turbines.Under action of wind-wave loads,a TMD may have a large vibration amplitude and impact the wind turbine with it to affect the wind turbine’s safety.Therefore,a TMD must be designed with limited position strategies.Here,a TMD was installed in the nacelle of a barge floating wind turbine.3 TMD limited position strategies including damping limited position strategy,stiffness limited position one and joint limited position one were proposed.A 3-DOF dynamic model for a floating offshore wind turbine was established with TMD stroke limited using Lagrange’s equations.Then,the vibration suppression effect of TMD was studied with different limited position strategies.Results showed that the joint limited position strategy can avoid defects of a single limited position strategy,and the maximum TMD stroke is 7.85m;the vibration suppression rates for standard deviations of the wind turbine’s tower top longitudinal displacement and its platform pitch angle are 40.01%and 61.78%,respectively.

关 键 词：海上浮式风力机 TMD 拉格朗日方程 振动模型 振动控制 限位策略 

分 类 号：O328[理学—一般力学与力学基础]