叶片是风力发电机中最基础和最关键的部件之一,影响着风力发电机的能量转化效率及安全性.以1 k W垂直轴低风速风力发电机叶片为例,介绍了叶片的基本结构,采用Solidworks对叶片进行建模,分析叶片受力;使用Gambit及Fluent计算叶片在额定工况下所受的风力载荷,简化叶片结构,绘制计算网格,设定计算条件;利用Midas NFX有限元软件对叶片进行静力学分析.仿真分析结果表明:叶片与连杆连接处形变量最小,叶片两端最大,最大变形量为31.25 mm;叶片的受力在叶片与连杆的连接点处最大,最大应力值为69.26 MPa.通过分析计算,得出风电叶片的受力分布规律,为叶片结构的进一步测试和优化提供依据和参考.
Blade is one of the most basic and critical components in wind turbine, which determines the energy conversion efficiency and safety. The blade of 1 k W vertical axis low speed wind turbine was taken as an example, the basic structure of the blade was introduced, the 3D model of the blade was constructed in Solidworks, force on the blade was analized, the wind load on blade under rated condition was computed in Gambit and Fluent. The structure of the blade was simplified, the computing grid was constructed, the calculation conditions were set, static analysis of the blade using the finite element software Midas NFX was conducted. The simulation results showed that: the minimal deformation appears at the joint of the blade and link rod, the maximum deformation locates at the ends of the blade, maximum deformation is 31.25 mm;the maximum force is in the connecting point of the blade and the link rod, the maximum stress value is 69.26 MPa. The result was analyzed and the distribution rule of the blade was obtained, which can provide reference for further testing and optimization of the blade.