| 双叉式叶尖结构对风力机风轮振动的影响 |
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| 引用本文： | 代元军,贺凯,李保华,翟明成.双叉式叶尖结构对风力机风轮振动的影响[J].排灌机械工程学报,2022,40(3):276-281. |
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| 作者姓名： | 代元军 贺凯 李保华 翟明成 |
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| 作者单位： | 1. 上海电机学院机械学院, 上海 201306; 2. 新疆农业大学机电工程学院, 新疆 乌鲁木齐 830091; 3. 新疆工程学院能源工程学院, 新疆 乌鲁木齐 830091 |
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| 摘 要： | 为降低风力机风轮的振动,提出一种用于小型风力机的双叉式叶尖结构改型设计方案,通过风轮模态试验与风轮振动特性试验,测出改型设计前后风轮的模态参数、振动频率与振动加速度幅值,研究不同夹角的双叉式叶尖结构对风力机风轮振动特性的影响.通过对比未改型风轮与双叉式叶尖结构风轮的试验.结果发现:双叉式叶尖结构使风轮的二阶到四阶固有频...
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| 关 键 词： | 风力机 模态分析 固有频率 阻尼比 振动频率 |
| 收稿时间： | 2020-03-27 |
Influence of double-fork blade tip structure on wind turbine vibration |
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| DAI Yuanjun,HE Kai,LI Baohua,ZHAI Mingcheng.Influence of double-fork blade tip structure on wind turbine vibration[J].Journal of Drainage and Irrigation Machinery Engineering,2022,40(3):276-281. |
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| Authors: | DAI Yuanjun HE Kai LI Baohua ZHAI Mingcheng |
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| Institution: | 1. Mechanical college, Shanghai DianJi University, Shanghai 201306, China; 2. College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830091, China; 3. College of Energy Engineering, Xinjiang Institute of Enginee-ring, Urumqi, Xinjiang 830091, China |
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| Abstract: | In order to reduce the vibration of the wind turbine wheel, a modified design scheme of double-fork blade tip structure for small wind turbine is proposed. Through the wind wheel modal test and wind wheel vibration characteristic test, the modal parameters, vibration frequency and vibration acceleration amplitude of the wind wheel before and after the modification design were measured to study the influence of the double-fork blade tip structure with different angles on the vibration characteristics of the wind turbine wheel. By comparing the test results of the unmodified wind wheel with double-fork blade tip structure wind wheel, it is found that the double-fork blade tip structure increases the second-order to fourth-order natural frequency and damping ratio of the wind wheel. The double-fork tip structure can adjust the trend of the wind wheel vibration frequency curve, make the wind wheel pass through the resonance zone faster, and make the speed corresponding to the resonance point far from the rated speed. When the rotation speed is 360 r/min, the vibration acceleration amplitude of the wind wheel increases suddenly. The double-fork blade tip structure will not eliminate the sudden increase, but it can reduce the amplitude of the vibration acceleration during the sudden increase. The double-fork blade tip structure reduces the vibration acceleration amplitude of the wind wheel under the condition that the rotation speed of the wind wheel is continuously increased. Therefore, the double-fork blade tip structure can effectively reduce the vibration of the wind wheel of small wind turbine, and the improvement effect has a greater correlation with the angle of the blade tip. The relevant research conclusions provide a new idea for the vibration reduction research of the wind wheel. |
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| Keywords: | wind turbine modal analysis natural frequency damping ratio vibration frequency |
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