为在不获得叶片详细属性的情况下得到叶片的等效阻尼比及其与响应幅值的变化关系,提出一种基于牵引式加载的叶片等效阻尼比计算方法。基于振动理论,分析叶片在不同周期性激励作用下的响应特性,构建等效阻尼比、变形量和稳态振幅之间的映射关系。采用牵引式设备对3支大型叶片进行阶梯加载并计算其各阶段振幅下的等效阻尼比,揭示叶片等效阻尼比与稳态振幅的近线性关系,在满载阶段叶片的等效阻尼比达到小振幅下的2~3倍,同时将计算结果与自由衰减法计算结果进行对比,验证基于牵引式加载计算叶片等效阻尼比方法的可行性和适用性。
Abstract
To obtain the equivalent damping ratio of the blade and its variation relationship with the response amplitude without acquiring detailed blade properties, a calculation method for the equivalent damping ratio of the blade based on traction loading is proposed. Based on vibration theory, the response characteristics of the blade under different periodic excitation are analyzed, and the mapping relationship among the equivalent damping ratio, deformation, and steady-state amplitude is constructed. Three large blades are loaded in steps using Tug Fatigue Testing system, and the equivalent damping ratios under various stages of amplitude are calculated, revealing the nearly linear relationship between the blade's equivalent damping ratio and the steady-state amplitude. At the full-load stage, the equivalent damping ratio of the blade reachs 2-3 times that under small amplitudes. Additionally, the calculated results are compared with those obtained from the free decay method, verifying the feasibility and applicability of the method for calculating the blade's equivalent damping ratio based on traction loading.
关键词
风电叶片 /
等效阻尼比 /
牵引式加载 /
疲劳测试 /
动力特性 /
振动理论
Key words
wind turbine blade /
equivalent damping ratio /
traction loading /
fatigue testing /
dynamic characteristics /
vibration theory
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参考文献
[1] NODA M, FLAY R G J. A simulation model for wind turbine blade fatigue loads[J]. Journal of wind engineering and industrial aerodynamics, 1999, 83(1-3): 527-540.
[2] 石可重, 赵晓路, 梁乃刚, 等. 风电叶片阻尼测定及其在频率计算中的应用[J]. 太阳能学报, 2012, 33(3): 457-461.
SHI K Z, ZHAO X L, LIANG N G, et al.Damping determination of wind turbine blade and application in frequence calculation[J]. Acta energiae solaris sinica, 2012, 33(3): 457-461.
[3] International Electrotechnical Commission.Wind turbines-Part 22: Conformity testing and certification[S]. IEC61400-22, 2010.
[4] 安宗文, 马军霞, 马强, 等. 风电叶片全尺寸疲劳试验加载方法研究[J]. 太阳能学报, 2021, 42(10): 250-257.
AN Z W, MA J X, MA Q, et al.Study on loading scheme for full-scale fatigue test of wind turbine blades[J]. Acta energiae solaris sinica, 2021, 42(10): 250-257.
[5] 张倩倩, 黄雪梅, 张磊安, 等. 风电叶片疲劳加载试验电磁激振特性研究[J]. 太阳能学报, 2022, 43(1): 1-5.
ZHANG Q Q, HUANG X M, ZHANG L A, et al.Electromagnetic excitation characteristics of fatigue loading test for wind turbine blades[J]. Acta energiae solaris sinica, 2022, 43(1): 1-5.
[6] CHAVIAROPOULOS P K, POLITIS E S, LEKOU D J, et al.Enhancing the damping of wind turbine rotor blades, the DAMPBLADE project[J]. Wind energy, 2006, 9(1/2): 163-177.
[7] GRINDERSLEV C, BELLONI F, HORCAS S G, et al.Investigations of aerodynamic drag forces during structural blade testing using high-fidelity fluid-structure interaction[J]. Wind energy science, 2020, 5(2): 543-560.
[8] 李玉琢, 崔德鹏. 基于自由衰减响应的阻尼比识别方法及误差分析[J]. 吉林交通科技, 2009 (3): 51-52.
LI Y Z, CUI D P.Damping ratio identification method and error analysis based on free attenuation response[J]. Science and technology of Jilin communications, 2009 (3): 51-52.
[9] 陈奎孚, 张森文. 半功率点法估计阻尼的一种改进[J]. 振动工程学报, 2002, 15(2): 151-155.
CHEN K F, ZHANG S W.Improvement on the damping estimation by half power point method[J]. Journal of vibration engineering, 2002, 15(2): 151-155.
[10] 李中付, 华宏星. 用时域峰值法计算频率和阻尼[J]. 振动与冲击, 2001, 20(3): 5-6.
LI Z F, HUA H X.Identification of frequencies and damping ratios with time domain peak values[J]. Journal of vibration and shock, 2001, 20(3): 5-6.
[11] WHITE D L.A new method for dual-axis fatigue testing of large wind turbine blades using resonance excitation and spectral loading[M]. Boulder: University of Colorado at Boulder, 2003.
[12] PAN Z J, WU J Z.A novel multi-point excitation fatigue testing method for wind turbine rotor blades[J]. Energies, 2017, 10(7): 1058.
[13] 乌建中. 风电叶片全尺寸结构测试理论基础, 系统设计和试验方法[M]. 上海: 同济大学出版社, 2021.
WU J Z.Full-scale structural testing theoretical basis, system design and experimental method of wind turbine blades[M]. Shanghai: Tongji University Press, 2021.
[14] LEE H G, LEE J.Damping mechanism model for fatigue testing of a full-scale composite wind turbine blade, part 1: modeling[J]. Composite structures, 2018, 202: 1216-1228.
[15] LEE H G, LEE J.Damping mechanism model for fatigue testing of a full-scale composite wind turbine blade, part 2: application of fairing[J]. Composite structures, 2018, 202: 1121-1125.
[16] ZHOU A G, SHI J L, MA Y, et al.Improved resonance method for fatigue test of full-scale wind turbine blades[J]. AIP advances, 2022, 12(8): 085223.
基金
工业和信息化部科技项目（TC220A04H）
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