偏航状态下风力机塔架-叶片耦合结构气弹响应分析  

Aero-elastic vibration analysis based on a tower-blade coupled model of wind turbine in yaw condition

作　　者：柯世堂[1] 王同光[1] 

机构地区：[1]南京航空航天大学江苏省风力机设计高技术研究重点实验室,南京210016

出　　处：《振动与冲击》2015年第18期33-38,44,共7页Journal of Vibration and Shock

基　　金：国家重点基础研究计划(2014CB046200);中国博士后科学基金特别资助(2015T80551)

摘　　要：提出一套快速预测偏航状态下风力机全机结构气弹响应的分析方法。以南京航空航天大学自主研发的5MW特大型概念风力机为例,建立风力机塔架-叶片耦合模型获取模态信息;采用谐波叠加法和改进的叶素-动量理论计算气动荷载,并考虑了偏航角对诱导速度的影响;再运用模态叠加法求解风力机耦合动力学方程,通过迭代循环更新叶片速度和气动力,对风力机塔架-叶片耦合结构进行气动载荷和气弹响应计算,并通过参数分析归纳出偏航角和气动弹性对风力机全机动态响应的影响规律。研究结论可为此类特大型风力机塔架-叶片耦合结构的抗风设计提供科学依据。A fast method to calculate aero-elastic responses of wind turbine based on a tower-blade coupled structure model was proposed. By taking the 5 MW wind turbine system designed by Nanjing University of Aeronautics and Astronautics as an example, a finite element model for investigating the wind turbine tower-blade coupled vibration was established to obtain the information of its dynamic characteristics. The harmonic superposition method and the modified blade element momentum theory were applied to calculate the aerodynamic load, considering the influence of yaw conditions. The mode superposition method was used to solve the kinetic equation of wind turbine system, the blade velocity and dynamic load were updated through iterative loop, and then the aero-elastic responses of wind turbine system were calculated. The influence of scientific basis to the wind-resistant yaw angle on wind-induced responses was discussed. The research contributes a structure design for the tower-blade system of large-scale wind turbines.

关 键 词：风力机塔架-叶片耦合结构 偏航角 气动载荷 叶素-动量理论 气弹响应 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程] TP391.9[自动化与计算机技术—计算机应用技术]