基于柔性支撑的风机传动链动态特性研究

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (17) : 44-51.

论文

基于柔性支撑的风机传动链动态特性研究

张盛林，朱才朝，宋朝省，黄华清

作者信息 +

Dynamic characteristics analysis of wind turbine drive train with flexible supporting

Zhang Sheng-lin Zhu Cai-chao Song Chao- sheng Huang Hua-qing

Author information +

文章历史 +

摘要

为了获得高空的风力资源，风力发电机组大多安装在100米的塔架上，在变风向与变载荷等恶劣工况共同作用下，塔架的柔性使得风机传动链受力变形复杂，成为风机的薄弱环节。以三点支撑风电机组为研究对象，将塔架考虑成柔性体，利用有限元法提取支撑塔架三个支撑接合部处参数，建立基于柔性支撑风机传动链耦合动力学模型，得到传动链的固有特征。其第一阶次和第二阶次固有频率分别对应塔架的摆振和传动链的扭振，利用坎贝尔图得到传动链的潜在共振频率，通过计算模态能量，对潜在共振点进行识别，得出1.55Hz为传动链的潜在共振频率。通过风场在线监测，跟踪风机主轴振动随转速的变化规律，实测风机传动链共振频率为1.56Hz，理论计算结果与实验结果基本一致，误差约为1%。

Abstract

In order to acquire the wind energy in the sky, most of the wind turbines are installed on the 100-meter towers. The flexibility of tower leads the force share and stress deformation of drive train become complex, while the wind turbines are always under varying direction of wind, loads and harsh working conditions, and this has become a weak link. A three point supporting wind turbine model in which the tower is considered to be flexible is analyzed, and the coupling parameters are extracted by finite elements method, then the dynamic coupling model of drive train with flexible support is established. The natural characteristic of the model is studied, the modes of the first two natural frequencies of the system respectively correspond to the tower swing and torsional vibration; after that, campbell diagram is used to get the potential resonance frequencies, modal-energy method is used on the identification of the potential resonance and the result indicates that 1.55Hz is the just potential frequency. An experiment is carried out in the wind field, in which the vibration characteristics of the main shaft are monitored when the rotational speed varies. The experimental result is consisting with the theoretical result, the error is one percent.

导出引用

张盛林，朱才朝，宋朝省，黄华清. 基于柔性支撑的风机传动链动态特性研究[J]. 振动与冲击, 2016, 35(17): 44-51

Zhang Sheng-lin Zhu Cai-chao Song Chao- sheng Huang Hua-qing. Dynamic characteristics analysis of wind turbine drive train with flexible supporting[J]. Journal of Vibration and Shock, 2016, 35(17): 44-51

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