本文選題：振動時效 + 超磁致伸縮激振器��； 參考：《蘭州交通大學(xué)》2017年碩士論文

【摘要】：金屬工件在經(jīng)過鍛壓、切削、淬火等加工工藝后,工件的內(nèi)部會產(chǎn)生殘余應(yīng)力,這種殘余應(yīng)力會大大降低工件的尺寸精度與疲勞強度,甚至?xí)构ぜ谑褂眠^程中發(fā)生斷裂等意外事故。而振動時效法作為一種去除金屬殘余應(yīng)力的新興時效工藝,有著更加高效、節(jié)能環(huán)保的優(yōu)點,目前已廣泛應(yīng)用于工業(yè)生產(chǎn)中,并大有取代傳統(tǒng)熱時效法、自然時效法的趨勢,因此研究設(shè)計一套新型振動時效裝置具有重要的理論以及現(xiàn)實意義。針對常見的傳統(tǒng)電動式激振器中存在的缺陷,通過采用超磁致伸縮材料設(shè)計一種振動頻帶范圍更寬、響應(yīng)更快、輸出力更大的激振器,并對其關(guān)鍵的技術(shù)問題進(jìn)行了理論以及仿真研究。通過深入研究超磁致伸縮材料的工作機理與基本特性,并綜合考慮實際工作現(xiàn)場的條件狀況,提出了激振器設(shè)計時應(yīng)注意的問題。在對超磁致伸縮材料基本特性所做研究工作的基礎(chǔ)上,結(jié)合振動時效中,時效工件對激振源輸出特性的要求,對激振器整體的結(jié)構(gòu)、超磁致伸縮棒、預(yù)緊力機構(gòu)、溫控裝置、驅(qū)動和偏置線圈等重要部件進(jìn)行了設(shè)計與優(yōu)化,并結(jié)合實際情況,配合計算得到各部件的具體幾何參數(shù),校驗后最終得到超磁致伸縮激振器的模型。超磁致伸縮激振器的工作特性直接取決于激振器內(nèi)磁路結(jié)構(gòu)中的磁場特性,為提升其工作性能,本文利用Comsol Multiphysics5.2有限元分析軟件,建立了激振器的有限元模型,分別仿真分析了激振器內(nèi)部磁路全開,半開,全閉合時內(nèi)部磁場分布的情況,確定采用閉合磁路的結(jié)構(gòu)設(shè)計方案。另一方面,對組成閉合磁路的部件(導(dǎo)磁體、導(dǎo)磁壁)選用不同屬性材料時,對GMM棒所處磁場的均勻程度進(jìn)行了仿真,最終得到閉合磁路內(nèi)各部件的材料選用辦法。為定量研究超磁致伸縮激振器的動態(tài)特性,文中建立了激振器系統(tǒng)的動態(tài)數(shù)學(xué)模型,并利用Matlab/Simulink仿真分析了主要結(jié)構(gòu)參數(shù)對激振器動態(tài)特性的影響,為激振器的動態(tài)設(shè)計與優(yōu)化提供理論依據(jù)。同時,基于極點配置法設(shè)計了激振器的狀態(tài)反饋控制器,從精密定位以及抗干擾能力兩個方面對該控制方法進(jìn)行仿真,結(jié)果顯示該控制器能夠較好控制激振器。
[Abstract]:After forging, cutting, quenching and so on, the residual stress will be produced in the workpiece, which will greatly reduce the dimensional accuracy and fatigue strength of the workpiece. It will even make the workpiece in the process of fracture and other accidents. As a new aging process for removing metal residual stress, vibration aging method has the advantages of more efficient, energy saving and environmental protection. It has been widely used in industrial production and has a tendency to replace the traditional thermal aging method and natural aging method. Therefore, it is of great theoretical and practical significance to study and design a new type of vibration aging device. In view of the defects in the conventional electric exciter, a vibration exciter with wider frequency band, faster response and larger output force is designed by using giant magnetostrictive material. The key technical problems are studied in theory and simulation. By studying the working mechanism and basic characteristics of Giant Magnetostrictive material and considering the condition of actual working field, the paper puts forward some problems that should be paid attention to in the design of exciter. On the basis of the research on the basic characteristics of giant magnetostrictive materials and the requirements of the aging workpiece on the output characteristics of the exciting source, the structure of the exciter, the giant magnetostrictive rod, the pretightening force mechanism and the temperature control device are considered. Some important components, such as drive coil and offset coil, are designed and optimized. Combined with the actual situation, the geometric parameters of each component are calculated, and the model of the giant magnetostrictive exciter is obtained after checking. The working characteristics of the giant magnetostrictive exciter are directly dependent on the magnetic field characteristics in the magnetic circuit structure of the exciter. In order to improve its working performance, the finite element model of the exciter is established by using Comsol Multisphysic5.2 finite element analysis software. The distribution of the magnetic field inside the exciter is simulated and analyzed when the magnetic circuit is fully open, half open and fully closed, and the structural design scheme of the closed magnetic circuit is determined. On the other hand, the homogeneity of the magnetic field of the GMM rod is simulated when the components (magnetic conductors, magnetic walls) of the closed magnetic circuit are selected with different properties. Finally, the material selection method of the components in the closed magnetic circuit is obtained. In order to quantitatively study the dynamic characteristics of the giant magnetostrictive exciter, the dynamic mathematical model of the exciter system is established, and the influence of main structural parameters on the dynamic characteristics of the exciter is simulated by Matlab / Simulink. It provides theoretical basis for dynamic design and optimization of vibration exciter. At the same time, the state feedback controller of the exciter is designed based on the pole collocation method. The control method is simulated from two aspects of precision positioning and anti-interference ability. The results show that the controller can control the exciter well.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG155.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳旭玲;朱如鵬;陳陽;;多場耦合下超磁致伸縮材料特性與應(yīng)用綜述[J];機械傳動;2016年10期

2 劉愛敏;韓衍昭;;振動時效技術(shù)的應(yīng)用與發(fā)展[J];鑄造技術(shù);2016年04期

3 劉旭輝;張慧;高曉莉;孫猛;汪盛炳;;超磁致伸縮驅(qū)動器及其性能測試系統(tǒng)的設(shè)計[J];煤礦機械;2015年10期

4 丁秀莉;武新軍;趙昆明;汪玉剛;;基于磁場空間分布的EMAT磁致伸縮激勵理論[J];無損檢測;2015年05期

5 張根保;張坤能;;殘余應(yīng)力消除技術(shù)[J];制造技術(shù)與機床;2015年04期

6 Yongfei Zhang;Haomiao Zhou;Youhe Zhou;;VIBRATION SUPPRESSION OF CANTILEVER LAMINATED COMPOSITE PLATE WITH NONLINEAR GIANT MAGNETOSTRICTIVE MATERIAL LAYERS[J];Acta Mechanica Solida Sinica;2015年01期

7 郭雪濤;王修勇;孟慶甲;;超磁化條件下超磁致伸縮作動器遲滯現(xiàn)象研究[J];湖南工程學(xué)院學(xué)報(自然科學(xué)版);2013年04期

8 賈振元;王福吉;鄒君;劉慧芳;;超磁致伸縮材料傳感/執(zhí)行器的原理與應(yīng)用[J];振動.測試與診斷;2013年04期

9 薛光明;何忠波;李冬偉;李玉龍;崔旭;;超磁致伸縮材料在液壓閥中的應(yīng)用現(xiàn)狀[J];液壓與氣動;2013年04期

10 徐桂梅;;振動時效工藝在大型焊接結(jié)構(gòu)件上的應(yīng)用[J];熱加工工藝;2013年07期

相關(guān)博士學(xué)位論文 前2條

1 趙沛;超磁致伸縮材料力磁耦合特性實驗研究[D];蘭州大學(xué);2012年

2 張旭輝;超磁致伸縮作動器優(yōu)化及主動隔振控制研究[D];北京航空航天大學(xué);2008年

相關(guān)碩士學(xué)位論文 前4條

1 楊銘偉;超聲振動時效消除殘余應(yīng)力機理分析及試驗研究[D];太原理工大學(xué);2015年

2 趙寅;超磁致伸縮驅(qū)動器建模及驅(qū)動控制研究[D];上海交通大學(xué);2013年

3 江曉陽;基于GMM和柔性鉸鏈的大位移微致動器設(shè)計與研究[D];武漢理工大學(xué);2011年

4 劉祥;微振平臺中激振器的設(shè)計建模與仿真研究[D];東北林業(yè)大學(xué);2011年

，

本文編號：2048035