A semi-analytical model of aerodynamic damping for horizontal axis wind turbines and its applications
A semi-analytical model of aerodynamic damping for horizontal axis wind turbines and its applications
复制标题
水平轴风力机气动阻尼半解析模型及其应用
DOI：
10.1016/j.oceaneng.2020.107861
复制
发表时间：
2020
影响因子：
5
通讯作者：
Junbo Jia
中科院分区：
文献类型：
--
作者：
Renqiang Xi;Piguang Wang;Xiuli Du;Kun Xu;Chengshun Xu;Junbo Jia
建立了水平轴风力机气动阻尼的半解析模型。考虑塔顶的平移自由度和转动自由度，利用叶片单元动量理论计算了转子的气动阻尼力，并将其简化为塔顶合力和合力偶。在此基础上，提出了模态气动阻尼比的半解析解。随后，利用半解析解计算了NREL 5 MW和WP 1.5 MW风力机的模态气动阻尼比，并从其动力响应中进行辨识，验证了该解的正确性。并对控制参数对风力机模态气动阻尼比的影响进行了灵敏度分析。最后，采用该气动阻尼模型的解耦分析方法预测风力机的动态响应幅值，并以气动-伺服-弹性全耦合分析为参考方法，检验该解耦方法的可靠性。结果表明，采用该气动阻尼模型的解耦分析方法能够准确预测水平轴风力机在风震联合荷载作用下的动力响应，明显优于现有的解耦模型。
A semi-analytical model of the aerodynamic damping for horizontal axis wind turbines was established. Considering the translational and rotational degrees of freedom of tower-top, aerodynamic damping forces on the rotor were calculated by the blade element momentum theory and simplified to a resultant force at the tower-top and a resultant couple. Thereafter, the semi-analytical solution of modal aerodynamic damping ratios was suggested. Subsequently, the modal aerodynamic damping ratios of the NREL 5 MW and WP 1.5 MW wind turbines were calculated by the semi-analytical solution and identified from their dynamic response to validate this solution. And, the sensitivity analysis was performed to evaluate the influence of control parameters on the modal aerodynamic damping ratios of wind turbines. Finally, the uncouple analysis method with this aerodynamic damping model was used to predict the dynamic response amplitude of wind turbines, wherein the aero-servo-elastic fully coupled analysis were set as the reference method to examine the reliability of this uncoupled method. The results indicated that the uncoupled analysis method employing this aerodynamic damping model can accurately predict the dynamic response of horizontal axis wind turbines excited by a combined wind-earthquake loading, which is significantly better than the existing uncoupled model.