大型水平轴风力机叶片气动弹性计算  

Aeroelastic Analysis of Large Horizontal Axis Wind Turbine Blades

作　　者：唐迪[1] 陆志良[1] 郭同庆[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《应用数学和力学》2013年第10期1091-1097,共7页Applied Mathematics and Mechanics

基　　金：国家重点基础研究发展计划(973计划)资助项目(2014CB046200);国家自然科学基金资助项目(11372135);江苏高校优势学科建设工程资助项目~~

摘　　要：给出了一种考虑几何非线性的大型风力机静、动气动弹性一体化计算方法.采用涡尾迹方法进行风力机气动载荷计算.建立风力机风轮的三维壳模型.沿周向平均风力机叶片载荷并加载到结构模型进行非线性静气动弹性分析.基于动力学小扰动假设,在静平衡构型下进行动力学线性化,计算风轮固有振动特性.继而结合非定常涡尾迹方法计算风力机动气动弹性响应.计算了NH1500叶片考虑几何非线性的静气动弹性位移和动气动弹性响应.结果表明,大型风力机叶片几何非线性较为明显地减小静气动弹性位移,同时降低动气动弹性的响应幅值.大型风力机气动弹性响应计算需要考虑几何非线性.A nonlinear aeroelastic analysis method for large horizontal axis wind turbines was presented. A vortex wake method and a nonlinear finite element method were coupled to realize the approach. The vortex wake method was used to predict the wind turbine aerodynamic loads and the rotor model was built with 3D shell elements. The averaged aerodynamic forces along the azimuth angle were applied to the structure model and the nonlinear static aeroelasticity was computed. The wind rotor modalities were obtained in the static aeroelastic configuration through linearization of the coupled equations. The static aeroelasticity and dynamic aeroelastic- ity were calculated for the NH 1500 wind turbine. Results show that the structural geometrical nonlinearities will significantly reduce the displacements and vibration amplitudes of the wind turbine blades. The structural geometrical nonlinearities are non-negligible for both the static aeroelasticity and dynamic aeroelasticity.

关 键 词：风力机 气动弹性 几何非线性 涡尾迹方法 

分 类 号：O355[理学—流体力学]