基于几何精确梁的风力机叶片动力学建模及动态特性分析  

Wind Turbine Blade Dynamics Modeling and Dynamic Characteristics Analysis Based on Geometrically Exact Beam Theory

作　　者：谢浩 李德源[1] 曲珍壮 黄维 XIE Hao;LI De-yuan;QU Zhen-zhuang;HUANG Wei(School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学机电工程学院,广州510006

出　　处：《新能源进展》2022年第3期203-208,共6页Advances in New and Renewable Energy

摘　　要：基于几何精确梁理论,结合广义-α时间预测法的迭代算法,考虑叶片复合铺层材料的各向异性特性,建立了大型风力机叶片的几何非线性动力学模型并导出了相应的特征方程,编制了数值仿真程序。通过对几何非线性梁标准算例和某10 MW柔性风力机叶片动力特性的模拟分析,验证了动力学模型的正确性,以及几何精确梁模型对分析叶片几何非线性大变形及其所导致的非线性动力学效应的有效性。叶片在静止和转动工况下的模态分析结果表明,在动力刚化效应作用下,叶片的固有频率会随着转速的增加而增大,动力刚化效应在挥舞方向比在摆振方向更明显,在低阶模态比在高阶模态更明显。Based on the geometrically exact beam theory, combined with the iterative algorithm of generalized-α time prediction method, the geometric nonlinear dynamics model of large wind turbine blade was established considering the anisotropic characteristics of composite laminates. The corresponding characteristic equations were derived and a numerical simulation program was developed. The correctness of the dynamic model and the effectiveness of the geometrically exact beam model in analyzing the large deformation of the geometrically nonlinear blade and its nonlinear dynamic effects were verified by the simulation analysis of the standard geometric nonlinear beam model and the dynamic characteristics of a 10 MW flexible wind turbine blade. The results of the modal analysis of the blade at rest and rotation conditions showed that the natural frequency of the blade increased with the increase of the rotational speed under the dynamic stiffening effect, and the dynamic stiffening effect was more obvious in flapwise direction than in edgewise direction, and more obvious in the low order modal than in the high order modal.

关 键 词：风力机叶片 几何精确梁 动力刚化 模态分析 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程] O313.7[理学—一般力学与力学基础]