大型风电机组塔架-叶片耦合振动对风力机柔性多体系统稳定性的影响  

INFLUENCE OF COUPLING VIBRATION OF TOWER-LARGE WIND TURBINE BLADES ON WIND TURBINE STABILITY OF FLEXIBLE MULTIBODY SYSTEM

作　　者：程友良[1] 薛占璞[1] 王月坤 蒋衍[1] Cheng Youliang;Xue Zhanpu;Wang Yuekun;Jiang Yan(School of Energy Power and Mechanical Engineering,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学能源动力与机械工程学院

出　　处：《太阳能学报》2019年第8期2170-2177,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金重点基金(11232012);中央高校基本科研业务费专项资金(2016XS107)

摘　　要：针对大型风电机组塔架-叶片耦合振动引起的风力机柔性多体系统稳定性问题,利用刚体有限元法对塔架-叶片耦合结构进行建模,并考虑塔架的结构参数对系统稳定性产生的影响,计算系统及各部件的自然频率,对风电机组塔架-叶片耦合结构进行振动分析。采用谐波合成法产生的气动载荷,对塔架-叶片耦合结构进行风振响应分析,从而得出塔架-叶片耦合振动及结构参数对于风力机柔性多体系统的影响。结果表明,塔架截面惯性矩与系统的自然频率呈非线性关系,1阶弯曲频率曲线最大值对应的塔架截面惯性矩为21 m^4,频率为1.25 Hz;振动最大位移量为0.85 m,发生在一阶屈服频率;塔架高径比最大值为26,自然频率最大值为5 Hz。该结果说明塔架结构参数变化及塔架-叶片耦合振动位移对风力机柔性多体系统稳定性产生一定的影响,从而为大型风电机组正常运行提供一定参考价值。Aiming at the stability of flexible multi-body systems caused by large wind turbine tower-blade coupling vibration,using rigid finite element method,and considering the influence of structure parameters of the tower on the stability of the system,the natural frequency of the system component was calculated. The wind turbine tower-blade coupling structure was analyzed. Using the harmonic synthesis method to produce an aerodynamic load,the wind vibration response of tower-blade coupling structure was analyzed. The influencing rule of the tower-blade coupling vibration and structure parameters on wind turbine flexible multi-body system were obtained. The results show that it is the non-linear relationship between the natural frequency of the system and the tower section inertia moment. The maximum bending value of one order frequency curve corresponding to the tower section inertia moment is 21 m^4,the frequency is 1.25 Hz,the maximum displacement is 0.85 m,vibration yield frequency is produced in the first order;The maximum ratio of height to diameter is 26,the maximum natural frequency is 5 Hz. These results indicate that the parameters of tower structure and tower-blade coupling vibration displacement have certain influence on the stability of wind turbine flexible multi-body system,which can provide some reference for large scale wind turbine design.

关 键 词：耦合振动 柔性多体系统 稳定性 截面惯性矩 振动 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]