發(fā)布時間：2018-06-16 06:07

  本文選題：H型 + 垂直軸風力機��； 參考：《華北電力大學》2014年碩士論文

【摘要】：隨著一次能源的不斷消耗以及環(huán)境污染越來越嚴重,風能,這種取之不盡用之不竭的清潔能源受到了各國的重視,因此成為各國研究開發(fā)的熱點。風能作為現(xiàn)在各國大力開發(fā)的新能源,其機組設備的研究成了研發(fā)的重點之一。隨著我國風力發(fā)電技術的不斷發(fā)展,單機的功率不斷增大,內(nèi)部結(jié)構(gòu)的復雜性也隨之增大,因此,風力機的靜動態(tài)特性分析也越來越重要。 本課題以10kW的H型垂直軸風力機為研究對象,主要研究分析了風力機重要結(jié)構(gòu)的靜動力特性,主要工作如下： (1)介紹課題的研究背景,對現(xiàn)有的垂直軸風力機的研究方法以及研究成果進行闡述,并介紹了與本課題有關的有限元分析法及有限元分析軟件ANSYS,給出風力機的結(jié)構(gòu)優(yōu)化方案。 (2)對風力機的主要結(jié)構(gòu),例如主軸、葉臂、葉片以及塔架進行靜力學特性分析,首先分析各結(jié)構(gòu)的受力情況,然后對結(jié)構(gòu)進行靜態(tài)分析,驗證結(jié)構(gòu)的強度、剛度是否滿足條件。在對葉片加載的過程中,利用FLUENT仿真方法計算出葉片的風壓值,并詳細闡述了如何從FLUENT中提取風壓并通過EXCEL和MATLB擬合函數(shù)關系式加載在ANSYS中的方法,此方法可以為精確計算風壓提供一個思路。采用Pro/Engineer軟件進行葉片建模,使ANSYS和Pro/Engineer進行無縫連接,將復雜模型直接導入ANSYS進行計算,而不會缺少任何葉片元素。 (3)在上述結(jié)構(gòu)靜力學分析的基礎上進行動力學特性分析,得出結(jié)構(gòu)的自振頻率,驗證結(jié)構(gòu)是否會產(chǎn)生共振,并對結(jié)構(gòu)的前六階振型進行分析,得出在下一步的結(jié)構(gòu)設計中應該考慮振型對結(jié)構(gòu)產(chǎn)生的影響。
[Abstract]:With the continuous consumption of primary energy and more serious environmental pollution, wind energy, this inexhaustible clean energy has been paid attention to by all countries, so it has become a hot spot in the research and development of countries. Wind energy, as a new energy source, has become one of the emphases of R & D. With the continuous development of wind power generation technology in China, the power of single turbine is increasing, and the complexity of internal structure is also increasing. Therefore, the static and dynamic characteristics analysis of wind turbine is becoming more and more important. Taking 10kW H vertical axis wind turbine as the research object, this paper mainly studies and analyzes the static and dynamic characteristics of the important structure of the wind turbine. The main work is as follows: 1) introduce the background of the research. The existing vertical axis wind turbine research methods and research results are described. The finite element analysis method and finite element analysis software ANSYSare introduced, and the structure optimization scheme of wind turbine is given. The main structure of wind turbine, such as spindle, blade arm, is introduced. The static characteristics of the blade and the tower are analyzed. The stress of each structure is analyzed at first, and then the static analysis of the structure is carried out to verify whether the strength and stiffness of the structure meet the conditions. In the process of blade loading, the wind pressure value of blade is calculated by fluent simulation method, and the method of how to extract wind pressure from fluent and load it in ANSYS by excel and MATLAB fitting function relation is described in detail. This method can provide an idea for accurate calculation of wind pressure. Pro-engineer software is used to model the blade, which makes ANSYS and Pro / engineer to connect seamlessly. The complex model is directly imported into ANSYS for calculation. Without any blade elements, the dynamic characteristics of the structure are analyzed on the basis of the statics analysis, and the natural vibration frequency of the structure is obtained to verify whether the structure will produce resonance. By analyzing the first six modes of the structure, it is concluded that the influence of the mode on the structure should be considered in the next step of the structural design.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM315

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本文編號：2025652