磁流變彈性體隔振器及其在變壓器隔振中的應(yīng)用
發(fā)布時間：2018-09-11 12:17
【摘要】：振動在生活中無處不在,劇烈的振動會降低材料的疲勞壽命,破壞結(jié)構(gòu)穩(wěn)定,還會通過結(jié)構(gòu)傳播,經(jīng)空氣耦合產(chǎn)生噪聲。隨著社會的發(fā)展,電力變電站的建設(shè)逐漸從郊區(qū)移到了商業(yè)區(qū)或大型小區(qū)周邊。變壓器運行時所產(chǎn)生的振動,通過結(jié)構(gòu)傳遞會給周邊的建筑及環(huán)境帶來危害,變電站及配電房運行中的振動噪聲問題日益突出。因此,對變壓器振動的研究及相關(guān)的隔振技術(shù)越來越受到供電部門及相關(guān)變壓器制造企業(yè)的關(guān)注。論文將從目前的新型智能材料—磁流變彈性體及其應(yīng)用入手,在對變壓器的振動分析的基礎(chǔ)上設(shè)計豎向磁流變彈性體隔振器,并對隔振器的性能進行測試。利用ANSYS有限元仿真軟件及Matlab/Simulink仿真平臺對變壓器-隔振器-基礎(chǔ)的隔振系統(tǒng)進行仿真實驗。本文的主要內(nèi)容如下:(1)對目前的變壓器振動及噪聲相關(guān)研究進行總結(jié)分析,并對磁流變彈性體研究應(yīng)用現(xiàn)狀進行闡述。(2)對變壓器的整體結(jié)構(gòu)進行相關(guān)的研究,對變電站的現(xiàn)場振動進行測試及分析,利用Solidworks軟件對變壓器的整體結(jié)構(gòu)進行建模。(3)在對變壓器振動特性分析的基礎(chǔ)上,制作了磁流變彈性體并對其磁流變效應(yīng)及剛度變化等特性進行分析,設(shè)計和加工了面向電力變壓器隔振的豎向磁流變彈性體隔振器。(4)搭建了相應(yīng)的實驗測試平臺,對所設(shè)計的磁流變彈性體隔振器進行力學性能測試。掃頻實驗數(shù)據(jù)表明設(shè)計的豎向隔振器在0-1.5A電流下,其頻移量可達到108%。動態(tài)力學性能測試結(jié)果表明,該隔振器的剛度與阻尼隨勵磁電流的增大而增大,此外,并對磁流變彈性體豎向隔振器進行了基于Kelvin模型的參數(shù)識別,得到的Kelvin模型能較準確地描述豎向隔振器的動態(tài)力學性能。(5)建立了變壓器-隔振器-基礎(chǔ)的隔振模型,并利用ANSYS軟件進行了相關(guān)的仿真,研究了不同的隔振器剛度及阻尼對隔振系統(tǒng)的隔振效果的影響,同時在Matlab/Simulink中進行了雙層隔振系統(tǒng)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.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TB535.1;TM41
[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.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TB535.1;TM41
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