风力机柔性叶片模态气动阻尼分析方法研究

doi:10.3901/JME.2018.02.176

机械工程学报 ›› 2018, Vol. 54 ›› Issue (2): 176-183.doi: 10.3901/JME.2018.02.176

风力机柔性叶片模态气动阻尼分析方法研究

池志强¹, 夏鸿建¹, 李德源¹, 张湘伟²

1. 广东工业大学机电工程学院广州 510006;
2. 广东理工学院肇庆 526100

收稿日期:2013-12-12 修回日期:2017-06-05 出版日期:2018-01-20 发布日期:2018-01-20
通讯作者: 夏鸿建(通信作者),男,1978年出生,博士,讲师。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;李德源(通信作者),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
作者简介:池志强,男,1990年出生。主要研究方向为风力机结构与动力学分析。E-mail:czq_edu@163.com;张湘伟,男,1950年出生,博士,教授,博士研究生导师。主要研究方向为固体计算力学,现代设计方法,随机过程与随机振动。E-mail:xwzhang@gdut.edu.cn
基金资助:
国家自然科学基金（51776044、51276043）和广东省科技项目（2017A010104016）资助。

Study on Modal Aerodynamic Damping Analysis Method for Wind Turbine Blade

CHI Zhiqiang¹, XIA Hongjian¹, LI Deyuan¹, ZHANG Xiangwei²

1. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006;
2. Guangdong Polytechnic College, Zhaoqing 526100

Received:2013-12-12 Revised:2017-06-05 Online:2018-01-20 Published:2018-01-20

摘要/Abstract

摘要： 针对大型水平轴风力机柔性叶片的模态气动阻尼数值分析方法进行研究。运用多体系统动力学建模方法和风力机叶片空气动力学模型，建立柔性叶片的气弹耦合方程，在求解此方程得出叶片在某运行工况下的气弹响应基础上，结合柔性叶片振动模态参数包括模态频率、模态向量和模态质量等物理量的识别和振动能量损失法，即计算气动力在叶片振动周期内所做的功，导出叶片模态气动阻尼比计算式，建立叶片挥舞、摆振各阶模态气动阻尼比分析流程。算例分析某柔性叶片在多种稳态风速下一阶模态气动阻尼比，表明所建立分析方法的有效性和可靠性。为大型风力机柔性叶片气动阻尼特性和气弹稳定性分析提供了有效的分析手段。

关键词: 风力机叶片, 模态分析, 气弹耦合, 气动阻尼

Abstract: The study focuses on the numerical analysis method of modal aerodynamic damping of large horizontal axis wind turbine flexible blades. By applying the modeling method of multi-body system dynamics and the blade aerodynamic model of a wind turbine, the aeroelastic coupling equation of the flexible blade is established. Also, the formula calculating the blade modal aerodynamic damping ratio is derived, based on the aeroelastic response obtained by numerically solving the coupling equation of the blade operating under certain working condition, the blade modal parameters identification, including the modal frequency, vector and mass, and the energy loss due to vibration, i.e. computing the work done by the aerodynamic force within one vibrational circle. Furthermore, the analysis process of the modal aerodynamic damping ratios of the blade flapwise and edgewise modes is built. A blade with flexibility is chosen as the research subject and its aerodynamic damping ratio of the first order mode is analyzed. The analysis results verify the effectiveness and reliability of the presented analysis method. The research supplies a feasible way for analyzing the aerodynamic damping characteristics and aeroelastic stability of large wind turbine blade with flexibility.

Key words: aerodynamic damping, aeroelastic coupling, modal analysis, wind turbine blade

中图分类号:

TK83

池志强, 夏鸿建, 李德源, 张湘伟. 风力机柔性叶片模态气动阻尼分析方法研究[J]. 机械工程学报, 2018, 54(2): 176-183.

CHI Zhiqiang, XIA Hongjian, LI Deyuan, ZHANG Xiangwei. Study on Modal Aerodynamic Damping Analysis Method for Wind Turbine Blade[J]. Journal of Mechanical Engineering, 2018, 54(2): 176-183.

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风力机柔性叶片模态气动阻尼分析方法研究

Study on Modal Aerodynamic Damping Analysis Method for Wind Turbine Blade

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