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毕业论文-风力发电机叶片的设计与性能分析，说明书共49页，17253字，附设计图纸。
摘要
叶片是风力机最重要的部件之一，设计良好的叶片是风力机获得较高风能利用系数和较大经济效益的基础。本文应用Wilson理论设计了100W水平轴风力机叶片，加工后分析了该风轮的气动性能和振动性能。经过实验发现所设计的风力机在低风速时基本能够达到设计的风能利用系数。并使得风力机在运行时其转速避开共振区，延长了风轮寿命，从而降低了设计成本。
本文采用实验模态分析方法对单叶片和三叶片风轮进行模态分析。结果表明：单叶片以挥舞振动为主，扭振不太明显；三叶片风轮具有一阶对称（反对称）、二阶对称（反对称）振型，而且反对称比较低。同时还发现单个叶片模态振型和三叶片风轮振型不同，而且固有频率相差较大，所以不能用单个叶片代替整个风轮的结构动态特性。然后再在风洞上测试叶片的气动性能。经过测试其性能非常接近理论设计结果。这表明设计的叶片基本上合理。
关键词：风力机 叶片 气动性能 振动性能

The design and performance analyzed of Wind turbine blade
Abstract
Wind turbine blade is one of the most important components. We designed a good wind turbine blade is base of higher coefficient and greater economic benefit. In this paper, we use Wilson method to design 100W horizontal axis wind turbine blade. After processing, we analyzed the aerodynamic performance and vibration performance. The study found that Low-speed wind turbine design at the basic design of wind energy utilization factor can be achieved. And makes wind turbine in operation at its speed to avoid resonance, prolonging the life of the wind round, which is designed to reduce the cost.
When design calculations, we found the chord changed was non-linear relation. Because we didn’t consider constraints among each section, the design leaves was serious distortion and the possessing was very difficult. We should modify it, but that will bring performance error. My principle is made the leaf blade performanf the blade in the range of the national standard, the vibration performance will be advanced, but its aerodynamic characteristics will be reduced. After processing we will do the aerodynamic performance and vibration test.
This paper performs experimental modal analysis in single-blade and 3-blades wind turbine. The results show: single-blade mainly waved in vibration, torsion vibration was not very noticeable. The 3-blades wind turbine has the stage with a symmetric (ant symmetric), the second symmetric (ant symmetric) vibration mode, and ant symmetric vibration mode‘s frequency relatively low, at the time we find the vibration mode and frequency have much different between single-blade and 3-blades wind turbine, so the single-blade didn’t replaced with 3-blades wind turbine of dynamic characteristics of the structure. Then we test aerodynamic performance in the wind-tunnel. After testing we found its performance was very close to the design results. This shows the design of the blade is basically reasonable.
Key word: Wind turbine; Blade; Pneumatic performance; Vibration performance

目 录
摘 要
Abstract
第一章绪论......................................................1
1.1引言............................................................1
1.2风力机叶片及其结构动力学研究现状................................1
1.2.1风力机叶片的研究现状..........................................1
1.2.2风力机叶片的结构动力学研究现状................................3
1.3本课题研究的内容................................................4
第二章风力机叶片设计的基本原理...........................5
2.1风力机叶片设计的空气动力学原理..................................5
2.1.1贝兹（Betz）理论..............................................5
2.1.2涡流理论......................................................7
2.1.3叶素理论......................................................7
2.1.4动量理论......................................................9
2.2风力机叶片的设计方法简介.......................................10
第三章风力发电机叶片的设计计算..........................12
3.1叶片的性能指标及其外形参数.....................................12
3.1.1叶片的性能指标...............................................12
3.1.2叶片外形参数的确定...........................................14
3.2叶片设计方案...................................................14
3.2.1约束条件.....................................................14
3.2.2目标函数.....................................................14
3.2.3设计步骤.....................................................15
3.3叶片设计计算...................................................15
3.3.1在计算过程中要解决的问题.....................................15
3.3.2设计计算程序框图.............................................15
3.4设计计算的结果输出.............................................17
3.4.1叶片的基本参数的计算结果.....................................18
3.4.2对100W叶片扭角和弦长的修正..................................18
第四章风力发电机的振动性能实验研究.....................20
4.1模态分析理论...................................................20
4.2模态测试基本原理及设备.........................................21
4.2.1模态参数识别原理.............................................22
4.2.2测试系统.....................................................23
4.3振动测试仪器设备...............................................24
4.3.1分析仪.......................................................24
4.3.2测力锤与配套力传感器.........................................24
4.3.3加速度传感器.................................................24
4.3.4电荷放大器...................................................24
4.4振动模态分析软件—ME’SCOPEVES软件功能.........................24
4.5风力发电机单个叶片模态实验分析.................................25
4.5.1基本参数及实验条件准备.......................................25
4.5.2实验结果及分析...............................................27
4.6整个风力机组叶片的振动模态实验研究分析.........................29
4.6.1叶片的模态测试和结果分析.....................................29
第五章风力发电机的气动性能实验研究.....................32
5.1实验原理.......................................................32
5.1.1风能利用系数测试原理.........................................32
5.1.2风速的测试原理...............................................32
5.2实验设备及仪器.................................................33
5.3风洞实验测试图.................................................33
5.4测试结果及分析.................................................34
第六章结论和展望.............................................37
6.1本论文的主要工作及结论.........................................37
6.2本文的创新之处.................................................37
6.3今后工作方向...................................................37
致谢..............................................................38
参考文献..........................................................39
附录1英文资料.....................................................41