磁流变弹性体隔振器及其在变压器隔振中的应用

发布时间：2018-09-11 12:17

【摘要】：振动在生活中无处不在,剧烈的振动会降低材料的疲劳寿命,破坏结构稳定,还会通过结构传播,经空气耦合产生噪声。随着社会的发展,电力变电站的建设逐渐从郊区移到了商业区或大型小区周边。变压器运行时所产生的振动,通过结构传递会给周边的建筑及环境带来危害,变电站及配电房运行中的振动噪声问题日益突出。因此,对变压器振动的研究及相关的隔振技术越来越受到供电部门及相关变压器制造企业的关注。论文将从目前的新型智能材料—磁流变弹性体及其应用入手,在对变压器的振动分析的基础上设计竖向磁流变弹性体隔振器,并对隔振器的性能进行测试。利用ANSYS有限元仿真软件及Matlab/Simulink仿真平台对变压器-隔振器-基础的隔振系统进行仿真实验。本文的主要内容如下:(1)对目前的变压器振动及噪声相关研究进行总结分析,并对磁流变弹性体研究应用现状进行阐述。(2)对变压器的整体结构进行相关的研究,对变电站的现场振动进行测试及分析,利用Solidworks软件对变压器的整体结构进行建模。(3)在对变压器振动特性分析的基础上,制作了磁流变弹性体并对其磁流变效应及刚度变化等特性进行分析,设计和加工了面向电力变压器隔振的竖向磁流变弹性体隔振器。(4)搭建了相应的实验测试平台,对所设计的磁流变弹性体隔振器进行力学性能测试。扫频实验数据表明设计的竖向隔振器在0-1.5A电流下,其频移量可达到108%。动态力学性能测试结果表明,该隔振器的刚度与阻尼随励磁电流的增大而增大,此外,并对磁流变弹性体竖向隔振器进行了基于Kelvin模型的参数识别,得到的Kelvin模型能较准确地描述竖向隔振器的动态力学性能。(5)建立了变压器-隔振器-基础的隔振模型,并利用ANSYS软件进行了相关的仿真,研究了不同的隔振器刚度及阻尼对隔振系统的隔振效果的影响,同时在Matlab/Simulink中进行了双层隔振系统的ON-OFF控制。
[Abstract]:Vibration is ubiquitous in life. Violent vibration will reduce the fatigue life of materials, destroy the stability of the structure, and produce noise through the air coupling. With the development of society, the construction of electric substation is gradually moving from the suburb to the commercial district or the periphery of the large residential area. The vibration generated by transformer operation will bring harm to the surrounding buildings and environment through the transmission of structure. The vibration and noise problems in the operation of substation and distribution room are increasingly prominent. Therefore, the research of transformer vibration and the related vibration isolation technology have attracted more and more attention from power supply departments and related transformer manufacturers. In this paper, based on the analysis of transformer vibration, a new type of intelligent material, magneto-rheological elastomer, and its application, a vertical magnetorheological elastomer isolator is designed, and the performance of the isolator is tested. ANSYS finite element simulation software and Matlab/Simulink simulation platform are used to simulate the vibration isolation system of transformer, vibration isolator and foundation. The main contents of this paper are as follows: (1) summarizing and analyzing the current research on transformer vibration and noise, and expatiating the research and application status of magneto-rheological elastomer. (2) researching the whole structure of transformer. The field vibration of substation is tested and analyzed, and the whole structure of transformer is modeled by Solidworks software. (3) based on the analysis of transformer vibration characteristics, The magnetorheological elastomer is fabricated, and its characteristics such as magneto-rheological effect and stiffness change are analyzed. A vertical magnetorheological elastomer isolator for power transformer isolation is designed and manufactured. (4) the corresponding experimental test platform is built. The mechanical properties of the magnetorheological elastomer isolator are tested. The experimental data show that the frequency shift of the designed vertical isolator can reach 108 at 0-1.5 A current. The dynamic mechanical properties test results show that the stiffness and damping of the isolator increase with the increase of the excitation current. In addition, the parameters of the magnetorheological elastomer vertical isolator are identified based on the Kelvin model. The obtained Kelvin model can accurately describe the dynamic mechanical properties of vertical vibration isolators. (5) the vibration isolation model of transformer-isolator base is established, and the simulation is carried out by using ANSYS software. The effects of different stiffness and damping of vibration isolator on the isolation effect of the vibration isolation system are studied, and the ON-OFF control of the double layer vibration isolation system is carried out in Matlab/Simulink.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TB535.1;TM41

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