大型风力机柔性叶片非线性气弹模态分析

doi:10.3901/JME.2020.14.180

机械工程学报 ›› 2020, Vol. 56 ›› Issue (14): 180-187.doi: 10.3901/JME.2020.14.180

• 可再生能源与工程热物理 • 上一篇下一篇

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大型风力机柔性叶片非线性气弹模态分析

黄俊东, 夏鸿建, 李德源, 郭坤翔

广东工业大学机电工程学院广州 510006

收稿日期:2019-10-09 修回日期:2020-02-10 出版日期:2020-07-20 发布日期:2020-08-12
通讯作者: 夏鸿建(通信作者),男,1978年出生,博士,副教授。主要研究方向为机械系统动力学与机械振动。E-mail:hjxia@gdut.edu.cn
作者简介:黄俊东,男,1993年出生。主要研究方向为风力机结构与动力学分析。E-mail:644293777@qq.com;李德源,男,1965年出生,博士,教授,硕士研究生导师。主要研究方向为风力机结构与动力学分析,机械振动。E-mail:lidey@gdut.edu.cn;郭坤翔,男,1993年出生。主要研究方向为风力机气动载荷和结构响应分析。E-mail:173965281@qq.com
基金资助:
国家自然科学基金（51776044，51105079）和广东省自然科学基金（2020A1515010844）资助项目。

Nonlinear Aeroelastic Modal Analysis of Large Wind Turbine Flexible Blades

HUANG Jundong, XIA Hongjian, LI Deyuan, GUO Kunxiang

School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006

Received:2019-10-09 Revised:2020-02-10 Online:2020-07-20 Published:2020-08-12

摘要/Abstract

摘要： 针对风力机尺寸增大，叶片刚柔耦合和气弹耦合特性增强，研究大型风力机转动柔性叶片弯曲与扭转耦合变形下的气弹模态及其稳定性。为准确描述柔性叶片的非线性变形特性，采用“超级单元”将柔性叶片离散成若干个刚体，并由运动副与力元连接构成多体系统，而后通过牛顿-欧拉方程建立叶片非线性动力学方程；气动模型则采用叶素动量理论结合修正的B-L（Beddoes-Leishman，B-L）动态失速模型，计算非定常气动载荷；然后基于变分原理，线性化叶片结构与气动载荷动力学方程，构建转动叶片的气弹线性化状态方程。最后以NREL 5 MW叶片为研究对象，在确定尖速比下，分析大型柔性叶片转动条件下的气弹复模态，计算叶片气弹频率与气弹阻尼比，分析叶片气动阻尼对颤振的影响，探究大型叶片颤振失稳机理。

关键词: 风力机, 气弹模态, 特征值方法, 颤振

Abstract: Aiming at the increasing size of wind turbine and the enhancement of blade's rigid-flexible coupling and aeroelastic coupling characteristics, the aeroelastic mode and stability of the flexible blade bending and torsion coupling deformation of large wind turbines are studied. In order to exactly describe the nonlinear deformation characteristics of flexible blades, the super-element method is used to discretize the flexible blades into a number of rigid bodies. And the multi-body system is formed by connecting the motion pair and the force element, and then the blade's nonlinear dynamic equation is established by the Newton-Euler equation. The blade element momentum method combined with modified Beddoes-Leishman(B-L) dynamic stall model to calculate the unsteady aerodynamic loads. Based on the variational principle, the nonlinear dynamic equations of the blade are linearized, and the aeroelastic linearization state equation of the rotating blade is constructed. Finally, the influence of large geometric deflection of flexible blade and unsteady effect of blade aerodynamic loads on aeroelastic modal characteristics and the mechanism of flutter are investigated by flutter analsys of NREL 5 MW blade at a constant tip speed ratio.

Key words: wind turbine, aeroelastic modal, eigenvalue method, flutter

中图分类号:

TK83

黄俊东, 夏鸿建, 李德源, 郭坤翔. 大型风力机柔性叶片非线性气弹模态分析[J]. 机械工程学报, 2020, 56(14): 180-187.

HUANG Jundong, XIA Hongjian, LI Deyuan, GUO Kunxiang. Nonlinear Aeroelastic Modal Analysis of Large Wind Turbine Flexible Blades[J]. Journal of Mechanical Engineering, 2020, 56(14): 180-187.

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大型风力机柔性叶片非线性气弹模态分析

Nonlinear Aeroelastic Modal Analysis of Large Wind Turbine Flexible Blades

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