论文部分内容阅读
基于几何精确梁理论建立叶片的非线性结构模型,基于自由涡尾迹理论建立叶片的非定常流场模型,并采用分区弱耦合方法建立大型风力机的非线性气弹模型。通过与线性模型计算结果对比验证非线性结构模型对线性结果的正确性,采用风洞实验数据验证自由涡尾迹模型的正确性。将该模型应用于NREL 5 MW的仿真计算,计算结果表明,该非线性气弹模型可以用于大型风力机在大载荷情况和考虑非定常流场的条件下的非线性响应仿真。
The non-linear structure model of the blade is established based on the geometrically accurate beam theory. The unsteady flow field model of the blade is established based on the free vortex trail theory. The nonlinear aeroelastic model of the large-scale wind turbine is established by using the partition weak coupling method. The correctness of the nonlinear structure model to the linear result is verified by comparison with the linear model. The correctness of the free vortex trail model is verified by the wind tunnel experimental data. The model is applied to the simulation of NREL 5 MW. The calculation results show that the nonlinear aeroelastic model can be used to simulate the nonlinear response of large wind turbine under large load and unsteady flow field.