大型风力机叶片在不同平均风速作用下的挠度及应力分析  

Analysis of deflection and stress for large wind turbine blade under different average wind speeds

作　　者：张建平[1] 李冬亮[1] 韩熠[1] 

机构地区：[1]上海电力学院,上海200090

出　　处：《可再生能源》2012年第7期37-40,45,共5页Renewable Energy Resources

基　　金：上海市科委项目(11160500600;10dz1140206);上海市自然科学基金项目(09ZR1413000;11ZR1414200);上海市教育委员会科研创新项目(11ZZ172;11ZZ171);上海市教委重点学科(第五期)项目(J51304);上海市教委第三期本科教育高地建设项目

摘　　要：利用有限元分析软件对风力机叶片在不同平均风速作用下的挠度和应力进行了分析。采用Davenport脉动风速谱模拟出不同平均风速,并计算出叶片各部位的挠度及其应力分布。计算结果表明,叶片的振动主要以挥舞振动为主,随着工作风速的增大,叶片挥舞振幅增大,叶片承受的mises应力主要集中在叶片迎风面的中部位置。该研究为风力机叶片的安全设计提供了技术参考。Deflection and stress of wind turbine blade under different average wind speeds were analyzed by finite element analysis software. Different average wind speeds were simulated by davenport spectrum of fluctuating wind, and deflection and stress distribution of each part of blades were calculated. The results indicate that the waving of blade is the main form of vibration, and that the waving amplitude increases with the wind speed, and that the mises stress is primarily in the middle of wind- ward side of the blade, which provides technical references for safety design of wind turbine blades.

关 键 词：风力机叶片 平均风速 挠度 mises应力 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程] TH113[机械工程—机械设计及理论]