大型风力机的几何非线性动态响应研究

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (14) : 182-187.

论文

大型风力机的几何非线性动态响应研究

曹九发，王同光，王枭

作者信息 +

Geometric Nonlinear Dynamics Response Research of Large-scale Wind Turbine

Cao Jiufa，Wang Tongguang ，Wang Xiao

Author information +

文章历史 +

摘要

随着风力机大型化、柔性化发展，风力机叶片的变形越来越大，几何非线性效应也越来越明显。采用自由涡尾迹方法提高风力机气动载荷计算精度，应用有限元方法建立了风力机叶片结构梁模型。应用伽辽金方法建立叶片的几何非线性刚度矩阵，同时构建了叶片的非线性动力学方程。采用Newmark直接积分法进行时间步长推进，并采用修正的Newton-Raphson方法进行增量迭代计算，实现了大型风力机叶片气动与非线性结构耦合计算模拟。最后，通过美国可再生能源实验室的 Phase VI风力机实验数据验证了计算模型的准确性和可靠性。同时以大型风力机NH1500为算例，计算了叶片的线性与非线性动态响应，分析了叶片几何非线性对动态响应和气动性能的影响。这对于提高大型风力机设计水平和各个部件载荷计算准确度具有重要意义。

Abstract

With the development of the large-scale flexible wind turbine, the deflection of the blade gets larger, which making the geometric nonlinear effect more obvious. A free vortex wake model is presented to improve the accuracy of the aerodynamics load. The blade is assumed to be a beam model to analyze the structural response with the finite element method. Then the nonlinear kinetic equation is built, in which the geometric nonlinear stiffness matrix is calculated by the Galerkin method. The equation is solved with the Newmark immediate integration method and the corrected Newton-Raphson method for time marching. Thus, the coupling simulation between the aerodynamics performance and the geometric nonlinear structural response of the large-scale wind turbine blade is realized. The computed results for NREL Phase VI rotor compare well with the experimental data, validating the prediction accuracy of the calculation model. The linear and nonlinear dynamics response of the large-scale wind turbine NH1500 is then calculated. The result indicates the influence on the structural response and aerodynamics performance of the geometric nonlinear analysis. The model is helpful to improve the design standard of the large-scale wind turbine and the accuracy of the load calculation.

导出引用

曹九发，王同光，王枭. 大型风力机的几何非线性动态响应研究[J]. 振动与冲击, 2016, 35(14): 182-187

Cao Jiufa，Wang Tongguang,Wang Xiao. Geometric Nonlinear Dynamics Response Research of Large-scale Wind Turbine[J]. Journal of Vibration and Shock, 2016, 35(14): 182-187

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