风力发电机组高强度螺栓连接技术研究

发布时间：2018-01-11 08:24

本文关键词：风力发电机组高强度螺栓连接技术研究　出处：《重庆大学》2011年硕士论文　论文类型：学位论文

【摘要】：高强度螺栓作为最常用的一种零部件,相比普通螺栓在同规格的情况下,具有承受载荷大,受力性能好,耐疲劳以及在动力载荷作用下不易松动等优点,在钢结构中得到广泛的应用。同样,在大型风力发电机组中高强度螺栓被大量采用,为适应更大功率的风力发电机组的自主设计开发,保证整个风力发电机组的运行可靠性,满足风电制造企业的需求。论文以材料力学、弹性力学、VDI2230高强度螺栓连接理论、Schmidt/Neuper高强度螺栓计算模型等为基础,并参照德国劳埃德船级社(GL)风力发电机组认证规范。采用有限元数值仿真和工程计算相结合的方法,对大型风力发电机组中关键部位高强度螺栓连接进行分析,系统地研究了高强度螺栓连接分析方法,以填补国内空白。论文主要研究内容及结构如下: 第一章:以国内外风力发电技术的研究及发展趋势为背景,研究分析了高强度螺栓连接的国内外研究和应用情况,并提出论文研究的意义和主要内容。第二章:系统地研究了高强度螺栓连接理论—VDI2230和Schmidt /Neuper高强度螺栓计算模型,为分析风力发电机组中关键部位高强度螺栓连接奠定理论基础。第三章:以某兆瓦级风力发电机组中的各塔筒段法兰连接处及地基预埋件连接处高强度螺栓为分析对象,并结合详细结构尺寸和第二章研究的高强度螺栓连接理论,进行了工程计算校核分析。第四章:综合考虑几何结构的复杂性、构件之间的非线性接触关系等,采用有限元数值仿真的方法,研究了塔筒顶端偏航轴承内、外圈连接处高强度螺栓的极限强度及疲劳寿命。第五章:综合考虑主机架、辅助机架等假体的影响及非线性接触关系,建立了包括主机架、辅助机架、连接用高强度螺栓的有限元模型,对主、辅助机架连接用高强度螺栓进行了极限强度分析。第六章:论文的研究结论和展望。
[Abstract]:As one of the most commonly used parts, high strength bolts have the advantages of large load, good mechanical performance, fatigue resistance and not easy loosening under dynamic load, compared with common bolts under the same specifications. It is widely used in steel structure. Similarly, high strength bolts are widely used in large scale wind turbine, so as to adapt to the independent design and development of more powerful wind turbines. To ensure the operational reliability of the whole wind turbine, to meet the needs of wind power manufacturing enterprises. This paper is based on the theory of material mechanics, elasticity and VDI2230 high strength bolt connection. Schmidt/Neuper high strength bolt calculation model and so on. The method of combining finite element numerical simulation with engineering calculation is adopted according to the certification code of German Lloyd's Classification Society (GLL) wind turbine generator. This paper analyzes the connection of high strength bolt in the key part of large wind turbine, and systematically studies the analysis method of high strength bolt connection in order to fill the gap in our country. The main contents and structure of this thesis are as follows: Chapter 1: based on the research and development trend of wind power generation technology at home and abroad, the research and application of high strength bolted connection are analyzed, and the significance and main contents of this paper are put forward. Chapter 2: the theory of high strength bolt connection-VDI2230 and Schmidt / Neuper high strength bolt model are studied systematically. It lays a theoretical foundation for the analysis of high strength bolt connection in key parts of wind turbine. Chapter three: take the high-strength bolts of flange connection of each tower and tube section and foundation embedded parts in a megawatt wind turbine as the analysis object. Combined with the detailed structure dimension and the theory of high strength bolt connection studied in the second chapter, the engineering calculation and verification analysis are carried out. Chapter 4th: considering the complexity of geometric structure and the nonlinear contact relationship between members, the finite element numerical simulation method is used to study the inner of the yaw bearing at the top of the tower and cylinder. Ultimate strength and fatigue life of high strength bolts at outer ring connections. Chapter 5th: considering the influence of mainframe, auxiliary frame and other prosthesis and nonlinear contact relationship, the finite element model including mainframe, auxiliary frame and high strength bolt is established. The ultimate strength analysis of high strength bolt used in auxiliary frame connection is carried out. Chapter 6th: the conclusion and prospect of the thesis.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TM315;TH131.3

【引证文献】