海上随机风速作用下风力机叶片动力响应分析  

Dynamic Response Analysis of Wind Turbine Blade Under Offshore Random Wind Speeds

作　　者：张建平[1] 李冬亮[1] 胡丹梅[1] 任建兴[1] 朱群志[1] 

机构地区：[1]上海电力学院能源与机械工程学院,上海200090

出　　处：《北京工业大学学报》2014年第2期194-199,共6页Journal of Beijing University of Technology

基　　金：上海市科学技术委员会项目(11160500600)

摘　　要：通过自行编制的Davenport风谱程序建立了更加贴近实际工况的风场,以UG建立的叶片三维实体模型为研究对象,对海上随机风速作用下风力机叶片的位移和应力响应进行了数值模拟与分析.结果表明:叶片最大挥舞振幅及其承受的最大Mises应力均随平均风速的增加而增大;最大挥舞振幅沿翼展方向呈非线性增大趋势,并在叶尖处达到振幅最大;最大Mises应力出现在叶片中部靠近前缘的位置,而在叶根和叶尖部位相对较小.The actual working wind filed was established by using the self-designed program of Davenport wind spectrum, and the displacement and stress response of the wind turbine blade under offshore random wind speeds was numerically simulated and analyzed on the basis of 3D blade solid model built by UG software. Results show that the maximum flapping amplitude and the maximum Mises stress of the blade both increase with the increase of the average wind speed; the growth trend of the biggest flapping amplitude for the whole blade is nonlinear along the wingspan and the tip amplitude reaches the maximum; and the max Mises stress appears near the leading edge in the middle part of the blade, and the root and tip parts are relatively small.

关 键 词：Davenport风谱 风力机叶片 动力响应 挥舞振幅 Mises应力 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]