摘要
选取某MW级风力发电机组为研究对象,设计了机组运动拓扑结构图,构建了风机整机的刚柔耦合多体动力学分析模型,并与气动力计算软件Aero Dyn和控制求解器通过接口力元实现联合仿真。模态分析计算得到了整机前6阶固有频率和模态振型,分析可知机组与关键转速区间激振频率不发生共振。动态仿真计算得到了3种不同工况下风机塔架迎风方向的位移、加速度动响应以及叶片三坐标方向的叶尖挠度,分析发现阵风期间塔架位移突然增大且瞬时波动剧烈;叶片的x方向叶尖挠度值最大,可能使叶片和塔架发生碰撞。
In this paper,selecting a WM wind turbine as research object,the model of coupled rigid and flexible multi-body dynamics was built and topology graph of wind turbine was designed. Through the interface force element the co-simulation between whole unit analysis model and the software Aero Dyn and controller was completed.From the modal analysis,first six step natural frequency and modal shape of wind turbine was obtained and it can be concluded that resonance between wind turbine and key speed interval exciting frequency would not occur. The displacement dynamic response,acceleration dynamic response and blade tip deflection in three coordinate directions of tower in the upwind direction were obtained and it can be concluded that extreme gust makes the tower structure displacement increases suddenly and the twinkling fluctuation occurs sharply. Additionally,the maximum blade tip deflection appears in the x direction and it may make the blade collide with tower which would influence the operation safety of wind turbine.
出处
《机床与液压》
北大核心
2015年第24期7-14,共8页
Machine Tool & Hydraulics
基金
supported by National Natural Science Foundation of China (No.51065026)
Doctoral Foundation of Ministry of Education of China (No.20106501110001)
Natural Science Foundation of Autonomous Region (No.2011211A002)
