中文摘要：

风力发电机叶片是一种细长的弹性体结构,运行时容易发生振动和变形,严重影响风力发电机的平稳运行。运用有限元数值方法研究风力机叶片的振动特性,利用模态分析法研究了叶片的静频和动频特性,获得了叶片的前6阶振动频率和相应振型。表明挥舞和摆阵是叶片的主要振动形式;在一定来流风速和转速作用下对叶片进行有预应力的振动特性分析,获得了风速与转速的变化对叶片振动频率的影响规律。利用谐响应分析法研究在最大风压与转速作用下叶片的振动特性,获得了最大受迫载荷作用下,叶片位移频率响应的变化规律。

英文摘要：

Wind turbine blade easily vibrate and deform as a slender elastomer at working,and the smooth running of wind turbine have been seriously affected. In this pape,the finite element numerical simulation is adopted for studying the vibration characteristics of the blade. The static frequency and dynamic frequency of the blade is studied by the modal analysis,the first six order vibration frequency and the corresponding vibration mode of blade are acquired,the waving and swing vibration for the main vibration mode are showed; then the prestressed vibration characteristics in a certain wind speeds and rotor speeds are analyzed,the effective rules of wind speeds and rotor speeds on the blade vibration frequency are received. On that basis,the vibration characteristics at the biggest wind pressure and rotor speed are analyzed through the harmonic response analysis,the change rules of displacementfrequency response of the blade which is under the action of forced load are acquired.