2MW风力发电机叶片的设计建模和疲劳寿命分析

发布时间：2019-07-10 10:32

【摘要】：众所周知,人类的生产发展与生活水平的提高离不开各种能源。随着化石能源的逐渐减少,越来越多的国家将目光投向了新能源方面。风能是一种绿色环保的可再生清洁能源,其最主要的利用方式是风力发电。因此,风力发电机的创新与发展是合理利用风能,进而改善能源结构和环境的关键。叶片是风力发电机组有效捕捉风能的关键部件,其成本大约占风机总成本的20%。因此,提高叶片的性能可以提高发电量,捕获更多的风能。目前,市面上主流的风机类型越来越倾向于大型化,而山东沿海地区是风能资源比较丰富的地区,比较适合大型风机的安装使用,因此,本文基于翼型设计软件Profili、三维建模软件UG、有限元分析软件ANSYS Workbench及空气动力学分析软件GH Bladed,同时根据沿海地区的风力资源利用现状,设计出一种适用于功率为2MW的陆上风力发电机的叶片,并对其进行载荷分析和疲劳寿命分析。本论文的主要研究内容包括:1.根据省气象局发布的山东沿海地区每季度的风速数据,计算出年平均风速。2.风机叶片的设计:确定额定功率与额定风速、计算叶片长度、确定叶片数目、确定叶片剖面翼型以及弦长和扭转角等。3.风机叶片的三维建模:在风机叶片中,各个截面的翼型是由若干段自由曲线构成,通过Profili软件将设计好的翼型数据导出,通过EXCEL进行坐标变换,得到翼型的实际空间坐标,保存成*.dat格式。最后,运用UG的曲线建模功能完成叶片的三维建模设计。4.叶片的疲劳寿命分析:应用GH Bladed分析风机正常运行、正常停机、紧急停机三种运行模式下的受力状态,运用ANSYS Workbench对叶片进行了单向流固耦合分析和疲劳寿命分析。
文内图片：

图片说明：（a）帆船图1-1（b）风车图1-1人类早期风能利用方式
[Abstract]:As we all know, the development of human production and the improvement of living standards can not be separated from a variety of energy sources. With the gradual reduction of fossil energy, more and more countries pay attention to new energy. Wind energy is a kind of green and environmentally friendly renewable clean energy, and its most important way of utilization is wind power generation. Therefore, the innovation and development of wind turbine is the key to make rational use of wind energy and then improve the energy structure and environment. Blade is the key component of wind turbine to capture wind energy effectively, and its cost accounts for about 20% of the total cost of wind turbine. Therefore, improving the performance of the blade can improve the power generation and capture more wind energy. At present, the mainstream fan types in the market are more and more inclined to large-scale, and Shandong coastal areas are rich in wind energy resources, which is more suitable for the installation and use of large fans. Therefore, this paper is based on airfoil design software Profili, 3D modeling software UG, finite element analysis software ANSYS Workbench and aerodynamics analysis software GH Bladed, according to the current situation of wind resources utilization in coastal areas. A blade of onshore wind turbine with power of 2MW is designed, and its load analysis and fatigue life analysis are carried out. The main research contents of this paper include: 1. According to the quarterly wind speed data of Shandong coastal areas released by the Provincial Meteorological Bureau, the annual average wind speed is calculated. 2. Fan blade design: determine rated power and rated wind speed, calculate blade length, determine the number of blades, determine blade profile airfoil, chord length and torsional angle, etc. 3D modeling of fan blade: in fan blade, the airfoil of each section is composed of several free curves. The designed airfoil data are derived by Profili software, and the actual spatial coordinates of airfoil are obtained by EXCEL coordinate transformation, which is saved into * .dat format. Finally, the 3D modeling design of blade is completed by using the curve modeling function of UG. Fatigue life analysis of blade: GH Bladed is used to analyze the stress state of fan under three operation modes: normal operation, normal shutdown and emergency shutdown. ANSYS Workbench is used to analyze the unidirectional fluid-solid coupling analysis and fatigue life analysis of the blade.
【学位授予单位】：烟台大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM315

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