大型水平轴风力机叶片应力特征分析  

Stress character analysis on horizontal axis wind turbine blade

作　　者：周鹏展[1,2] 曾竟成[2] 肖加余[2] 杨军[1] 

机构地区：[1]株洲时代新材料科技股份有限公司,湖南株洲412007 [2]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《可再生能源》2009年第5期6-9,共4页Renewable Energy Resources

基　　金：国家863计划项目(2007AA03Z563);中国博士后基金项目(20070420832);湖南省科技项目(2008RS4033)

摘　　要：基于ANSYS软件,对某款1500kW大型水平轴风力机叶片的应力特征进行了分析。该水平轴风力机叶片在极限挥舞载荷的作用下,叶片大梁和叶根的整体应力水平比较高,而剪切腹板和翼板上的整体应力水平比较低,这说明叶片大梁和叶根是叶片的主要承力部件,而剪切腹板和翼板主要作用是维持叶片结构的稳定性。另外,在叶根与剪切腹板相接的角点上存在应力集中现象,其最大应力为228MPa,但是,剔除应力集中点后,叶片大梁上的应力比叶根高,叶片大梁中部约1/3区域的应力都比较高,其最大应力为211MPa,平均应力为180MPa左右。此外,该叶片的最大应力仅为所采用的玻纤/环氧复合材料拉伸强度的34.8%,说明该叶片的铺层结构设计是偏于安全的,可以适当提高叶片挂机运行时的额定发电功率。Based on ANSYS software, the stress character analysis on a kind of 1 500 kW largescale horizontal axis wind turbine blade was carried out. The analysis results show： At the action of uhimate flapwise loads, the whole stress level of the spar cap and the blade root is higher, and that of the shear web and the airfoil plate is lower, so those show that the spar cap and the blade root are the main force bearing parts, while the shear web and the airfoil plate are mainly for keeping the blade structure stable. Otherwise, there is stress concentration on the interface comer point between the blade root and the shear web, and the maximum stress is 228 MPa. After neglecting the stress concentration point, the stress of the spar cap is higher than that of the blade root, and the stress is higher at about 1/3 length from the center zone of the spar cap, and its maximum stress is 211 MPa, and its mean stress is about 180 MPa. According to the tensile stress of the fibre-glass/ epoxy composites, the percentage of the blade＇s maximum stress in its tensile stress is only 34.8%. It is indicate that the laminate structural design of the blade is inclined to be safety, and its rated electrical power can be increased properly at operation.

关 键 词：水平轴风力机叶片 应力特征 ANSYS软件 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]