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为分析叶片旋转和离心力效应对风力机塔架风振反应的影响,建立考虑叶片离心力效应的风力机塔-轮整体有限元模型分析系统动力特性,采用谐波叠加法和改进的叶素动量理论模拟考虑旋转效应的叶片和塔架脉动风速时程,结合笔者提出的风振精细化频域计算方法分析塔架与叶片在脉动风作用下的动力反应。研究表明:旋转效应会增大叶片的气动载荷和塔架的动力响应及风振系数,离心力效应增大了风力机系统频率并减小了塔架的风振反应及风振系数。
In order to analyze the effect of blade rotation and centrifugal force on the wind-induced vibration response of wind turbine tower, a wind turbine tower-wheel integrated finite element model considering the effect of blade centrifugal force is established to analyze the system dynamic characteristics. The harmonic superposition method and the modified elemental momentum theory The time history of the vane and tower pulsation wind speed considering the rotation effect is simulated, and the dynamic response of the tower and vane under pulsating wind is analyzed combining with the calculation method of wind vibration fine frequency domain proposed by the author. The results show that the rotation effect increases the aerodynamic load of the blade and the dynamic response of the tower and the wind-induced vibration coefficient. The centrifugal force increases the frequency of the wind turbine system and reduces the wind-induced vibration response and the wind-induced vibration coefficient of the tower.