风力发电机岩石锚杆基础受力状态分析与监测

发布时间：2018-03-17 00:34

本文选题：压电陶瓷　切入点：风力发电机岩石锚杆基础　出处：《沈阳建筑大学》2014年硕士论文　论文类型：学位论文

【摘要】：近年来,随着世界对可再生无污染清洁能源的需求,风能作为一种获取方便的可再生资源而广受关注。截止2013年,世界风力发电机技术飞速发展,无论是海上风力发电机还是陆上风力发电机都得到了根本上的技术更新换代。虽然我国的风力发电机技术一直处于世界较低水平,但是随着国家对清洁能源的重视,我国也在追赶世界的脚步,开始对风力发电机进行了大力的开发。对风机基础受力特性的进行研究,为今后的风机基础的设计提供理论依据,完善行业标准有重要意义。为了解风机基础实际的运行状态,需要对基础进行实时的健康监测。国内外有关的健康监测方法有很多,其中,基于压电陶瓷的结构健康监测技术以其灵敏度高、响应快、对裂缝损伤敏感等优点,而被应用于本课题的健康监测的研究中。铁岭开发区风电场新建项目,是全世界第一次将岩石扩底锚杆这一技术应用到风力发电机的基础当中,该方法大幅度的减小了基础的尺寸。本文对铁岭市开发区风电场新建工程的风力发电机基础进行有限元模拟分析,并在现场埋置了压电陶瓷传感器进行实际受力监测,主要研究内容如下：(1)针对铁岭的实际项目,通过理论计算,了解风机基础的混凝土极限承载力与地基的极限承载力；(2)运用大型有限元软件ABAQUS对风机基础进行静力分析,研究其在设计院提出的极限荷载下的应力状态,并与理论计算的结果相对比,验证其正确性：(3)用ABAQUS软件对其风力发电机的基础进行弹塑性模拟分析,即Pushover方法。研究风力发电机岩石锚杆基础的破坏原因与破坏形式。为了贴近实际项目,有限元模型的建立全部与实际项目相同；(4)铁岭风电场现场埋置压电陶瓷传感器,开发基于LabVIEW平台的监测系统,并在风机正式运行后现场实际测量。将风力发电机实际运行后的受力情况与模拟的结果进行对比,实证有限元分析的正确性。
[Abstract]:In recent years, with the worldwide demand for renewable clean energy, wind energy has attracted much attention as a kind of convenient renewable resources. As of 2013, the technology of wind turbines in the world has developed rapidly. Both offshore and onshore wind turbines have been fundamentally upgraded. Although the technology of wind turbines in China has always been at a low level in the world, with the country's emphasis on clean energy, Our country is also catching up with the world, and has begun to develop the wind turbine vigorously. The research on the mechanical characteristics of the fan foundation provides the theoretical basis for the design of the fan foundation in the future. The improvement of industry standards is of great significance. In order to understand the actual operating state of fan foundation, it is necessary to carry out real-time health monitoring of the foundation. There are many relevant health monitoring methods at home and abroad, among which, The structure health monitoring technology based on piezoelectric ceramics has been applied to the research of health monitoring for its advantages of high sensitivity, fast response and sensitive to crack damage. It is the first time in the world that rock bolting is applied to the foundation of wind turbines. This method greatly reduces the size of the foundation. In this paper, finite element simulation analysis of the wind turbine foundation of the new wind farm in Tieling development zone is carried out, and the piezoelectric ceramic sensor is embedded in the field to carry out the actual force monitoring. The main research contents are as follows: (1) in view of the actual project of Tieling, through theoretical calculation, the ultimate bearing capacity of concrete and foundation of fan foundation is understood. (2) the static analysis of fan foundation is carried out by using large-scale finite element software ABAQUS. The stress state of the wind turbine under the ultimate load proposed by the design institute is studied and compared with the theoretical calculation results. The correctness of the stress state is verified by using ABAQUS software to simulate the foundation of the wind turbine generator. In order to get close to the actual project, the finite element model is all the same as the actual project, and the piezoelectric ceramic sensor is embedded in the site of Tieling wind farm. A monitoring system based on LabVIEW platform is developed, and the actual field measurement is carried out after the fan is officially operated. The force situation of wind turbine after actual operation is compared with the simulation results, and the correctness of the empirical finite element analysis is obtained.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU476

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