考虑几何非线性的风力机叶片气弹模型

吕品; 廖明夫; 尹尧杰

doi:10.13433/j.cnki.1003-8728.2015.1201

考虑几何非线性的风力机叶片气弹模型

doi: 10.13433/j.cnki.1003-8728.2015.1201

1.
西北工业大学旋转机械与风能装置测控研究所, 西安 710072

基金项目:

中央高校基本科研业务费专项基金项目(3102015BJ(Ⅱ)CG015)资助

详细信息

作者简介:
吕品(1987-),博士研究生,研究方向为航空发动机结构动力学和风力发电技术,lyu.pin@outlook.com

通讯作者:
廖明夫(联系人),教授,博士,博士生导师,mfliao@nwpu.edu.cn

计量
- 文章访问数: 162
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- PDF下载量: 18
- 被引次数: 0
出版历程
- 收稿日期: 2015-02-04
- 刊出日期: 2015-12-05

An Aero-elastic Analysis Method for Wind Turbine Blades with Geometrically Nonlinear Effect

Liao Mingfu,
Yin Yaojie^,,

1.
Institute of Monitoring and Control for Rotating Machinery and Wind Turbines, Northwestern Polytechnical University, Xi'an 710072, China

摘要

摘要: 针对大型轻型柔性叶片存在的几何非线性变形情况,基于几何精确梁理论建立了非线性叶片梁单元,考虑了叶片预弯预扭、各向异性、变形耦合以及截面偏心的特点。对非线性结构方程的数值求解方法进行了探讨。结合动量叶素理论建立了可用于分析叶片大变形动态响应问题的几何非线性气弹模型。通过两个算例验证了结构模型的正确性。以NREL 5MW风力机叶片为研究对象,分析了叶片静态变形、固有频率、以及在阵风、偏航错误条件下的动态响应,并与FAST计算结果进行了对比,结果表明,在静态变形范围内几何非线性气弹模型与FAST非常好的吻合,进一步验证了该模型计算正确性。通过降低叶片截面弯曲刚度,发现在叶片大变形时,几何非线性气弹模型可以获得更准确的结果。
- 风力机叶片 /
- 几何非线性 /
- 几何精确梁 /
- 大变形
Abstract: To study the higher nonlinear behavior introduced by larger, lighter and more flexible wind turbine blade, an aero-elastic model with geometrically nonlinear beam is developed in this paper. The nonlinear beam based on geometrically exact beam theory contains the effects respectively of pre-bending, pre-twisting and eccentric shape. BEM theory is used because of its efficiency. The structure model is validated by two simulation cases. The static deflections of NREL 5MW offshore wind turbine blade show good agreement with results obtained by FAST. The natural frequencies and the responses under gust and yaw error conditions are also simulated. The responses of blade with reduced stiffness show more exactly results of the geometrically nonlinear aero-elastic model rather than the linear model.
- acceleration /
- aeroelasticity /
- angle of attack /
- angular velocity

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参考文献(16)

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