水平轴风力机柔性叶片气弹耦合分析  

THE AEROELASTIC COUPLING ANALYSIS OF FLEXIBLE BLADES FOR A HORIZONTAL AXIS WIND TURBINE

作　　者：李德源[1] 莫文威 夏鸿建[1] 吕文阁[1] 刘雄[2] 

机构地区：[1]广东工业大学机电工程学院,广州510006 [2]汕头大学工学院,汕头515063

出　　处：《太阳能学报》2015年第3期734-742,共9页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51276043);教育部高等学校博士学科点专项科研基金(20124402110005);教育部科学技术研究重点项目(212130)

摘　　要：针对水平轴风力机柔性叶片的气弹耦合模型与数值积分方法进行研究。首先应用超级单元法,将柔性叶片离散为若干个超级单元,单元内刚体之间由带有力元弹簧和阻尼器的万向节或转动铰联接,以描述叶片的挥舞、摆振和扭转等运动;基于计算多体动力学理论,应用R-W(Roberson-Wittenburg)方法,导出带约束的旋转叶片多体系统动力学方程;基于叶素理论,计算叶片变形状态下各刚体所受的气动力,在数值积分过程中实时实现两者之间的耦合。算例分析了某1.5 MW风力机叶片在一定风速和转速下的气弹耦合。结果表明超级单元法能用较少的自由度准确描述柔性叶片的弹性变形、气动载荷和叶片位移间的耦合,为风力机整机气动弹性耦合及稳定性分析提供了实用的分析方法。The aeroelastic coupling analysis of flexible blade of horizontal axis wind turbine and numerical integration method were studied. Firstly, a so-called superelement was used to discretize the flexible blade into a number of superelements consisting of a series of rigid bodies connected by springs and dampers to describe the blade fiapwise, edgewise and torsional deforinations. The dynamical equations of muhibody system of controlled rotating blade were obtained via the R-W method based on the theory of computational dynamics of multibody system and the aerodynamic forces acting upon each rigid body of the blade under deformation state were calculated by the blade element theory. The coupling between the blade deformations and the arodynamic forces was realized during real-time numerical integration. The aeroelastic coupling of a 1.5 MW wind turbine blade operating at certain wind speed and protating speed was analyzed. The analysis results indicated that the superelement modeling method can describe the coupling among blade elastic deformation, aerodynamic loads and blade displacement well, and this method is a useful analysis method for the aeroelastic coupling and stability analysis of wind turbine systems.

关 键 词：风力机 柔性叶片 多体系统 超级单元 气弹耦合 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]