【摘要】：超精密的加工和測(cè)量設(shè)備為了避免地面振動(dòng)及環(huán)境干擾的影響,通常需要隔振平臺(tái)來(lái)防護(hù)。鋼彈簧由于其結(jié)構(gòu)簡(jiǎn)單,數(shù)學(xué)建模較精準(zhǔn),不需要額外提供動(dòng)力并具有較長(zhǎng)的使用壽命,因此被用作隔振器的被動(dòng)隔振元件。金屬?gòu)椈伤絼偠忍匦允怯绊懜粽裣到y(tǒng)的重要因素,本文針對(duì)負(fù)載位置對(duì)金屬?gòu)椈杀粍?dòng)隔振系統(tǒng)的影響,開(kāi)展對(duì)單個(gè)金屬?gòu)椈傻乃絼偠忍匦浴⒏粽裣到y(tǒng)理論建模及負(fù)載位置對(duì)隔振系統(tǒng)穩(wěn)定性與振動(dòng)傳遞造成影響的研究。用于隔振器中的金屬?gòu)椈纱瓜騽偠瓤煽醋鞴潭ǔ?shù),但其水平剛度特性較為復(fù)雜與很多因素有關(guān),本文通過(guò)將金屬?gòu)椈傻刃橐欢斯潭ㄒ欢俗杂傻牡冉孛鎽冶哿?根據(jù)彈性理論推導(dǎo)其自由端承受垂向載荷及水平向載荷時(shí)金屬?gòu)椈勺杂啥说臋M向變形,進(jìn)而得到單個(gè)不同截面金屬?gòu)椈傻乃絼偠�。為了研究金屬�(gòu)椈筛粽裣到y(tǒng)受到負(fù)載作用的性能變化建立其動(dòng)力學(xué)模型。考慮到金屬?gòu)椈伤絼偠入S其垂向載荷的變化,對(duì)負(fù)載作用下每個(gè)隔振單元承受的垂向載荷進(jìn)行分析,得到不同的水平剛度。在此基礎(chǔ)上根據(jù)剛體運(yùn)動(dòng)學(xué)知識(shí)得到隔振系統(tǒng)質(zhì)量矩陣與剛度矩陣,并通過(guò)模態(tài)分析理論得到系統(tǒng)頻響矩陣。本文還對(duì)負(fù)載的位置對(duì)隔振系統(tǒng)穩(wěn)定性及振動(dòng)的傳遞造成的影響進(jìn)行了分析。根據(jù)機(jī)械系統(tǒng)在平衡位置時(shí)穩(wěn)定平衡原理,通過(guò)分析隔振系統(tǒng)受到擾動(dòng)后的能量變化,求得使隔振系統(tǒng)處于穩(wěn)定的質(zhì)心區(qū)域。對(duì)負(fù)載在隔振器臺(tái)面的不同位置時(shí),根據(jù)系統(tǒng)頻響矩陣分析隔振系統(tǒng)振動(dòng)傳遞情況。并用有限元軟件對(duì)負(fù)載在隔振器臺(tái)面的不同位置時(shí),隔振系統(tǒng)各方向的振動(dòng)傳遞情況進(jìn)行仿真分析,并與理論結(jié)果進(jìn)行對(duì)比,驗(yàn)證分析結(jié)果的正確性。最后對(duì)負(fù)載在隔振器臺(tái)面的不同位置時(shí),隔振系統(tǒng)各方向的振動(dòng)傳遞情況進(jìn)行實(shí)驗(yàn)測(cè)試,進(jìn)一步驗(yàn)證分析結(jié)果的正確性。
[Abstract]:In order to avoid the impact of ground vibration and environmental interference, ultra-precision machining and measuring equipment usually need vibration isolation platform to protect. Steel spring is used as passive vibration isolator because of its simple structure, accurate mathematical modeling, no additional power and long service life. The horizontal stiffness characteristic of metal spring is an important factor affecting the vibration isolation system. In this paper, the horizontal stiffness characteristics of a single metal spring are carried out in view of the influence of load position on the passive vibration isolation system of metal spring. The theoretical modeling of vibration isolation system and the influence of load position on the stability and vibration transfer of vibration isolation system are studied. The vertical stiffness of the metal spring used in the isolator can be regarded as a fixed constant, but the horizontal stiffness characteristics are complicated by many factors. In this paper, the metal spring is equivalent to a cantilever beam with one end fixed and one end free. Based on the elastic theory, the transverse deformation of the free end of the metal spring under vertical and horizontal loads is derived, and the horizontal stiffness of a single metal spring with different sections is obtained. The dynamic model of metal spring vibration isolation system is established in order to study the change of its performance under load. Considering the variation of horizontal stiffness of metal spring with its vertical load, the vertical load of each isolation unit under load is analyzed, and different horizontal stiffness is obtained. On this basis, the mass matrix and stiffness matrix of vibration isolation system are obtained according to the knowledge of rigid body kinematics, and the frequency response matrix of the system is obtained by modal analysis theory. The influence of load position on the stability and vibration transfer of vibration isolation system is also analyzed. According to the principle of stabilizing the mechanical system in the equilibrium position, by analyzing the energy change of the vibration isolation system after being disturbed, the stable center of mass region of the vibration isolation system is obtained. The vibration transfer of the isolation system is analyzed according to the frequency response matrix of the system when the load is at different positions on the vibration isolator table. The finite element software is used to simulate and analyze the vibration transfer of the vibration isolation system in different positions of the isolator table, and the results are compared with the theoretical results to verify the correctness of the analysis results. Finally, the vibration transfer of the vibration isolation system in different positions of the isolator table is tested experimentally, which further verifies the correctness of the analysis results.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB535.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陽(yáng)光武;肖守訥;;螺旋圓彈簧加橡膠墊的橫向剛度研究[J];鐵道車輛;2013年09期

2 呂俊超;陳照波;焦映厚;劉文濤;;基于音圈電機(jī)的Stewart主動(dòng)隔振平臺(tái)設(shè)計(jì)[J];機(jī)械設(shè)計(jì)與制造;2013年02期

3 劉磊;王萍萍;孔憲仁;王本利;;Stewart平臺(tái)動(dòng)力學(xué)建模及魯棒主動(dòng)隔振控制[J];宇航學(xué)報(bào);2011年06期

4 陽(yáng)光武;肖守訥;張衛(wèi)華;;螺旋圓彈簧的橫向剛度分析[J];中國(guó)鐵道科學(xué);2010年04期

5 劉麗;張衛(wèi)華;;金屬?gòu)椈蓜偠阮l變分析及等效算法[J];交通運(yùn)輸工程學(xué)報(bào);2007年05期

6 袁哲俊;;精密和超精密加工技術(shù)的新進(jìn)展[J];工具技術(shù);2006年03期

7 付振鷺,尹學(xué)軍,趙德全;彈簧阻尼隔振系統(tǒng)在螺旋壓力機(jī)基礎(chǔ)中的應(yīng)用[J];鍛壓裝備與制造技術(shù);2005年02期

8 米彩盈,李芾;軸箱螺旋壓縮圓彈簧橫向剛度分析[J];鐵道機(jī)車車輛;2003年05期

9 陳智鋒,張紹宗,呂海寶,張海峰;隔振設(shè)計(jì)在超精密加工與測(cè)量中的應(yīng)用[J];航空精密制造技術(shù);2002年03期

10 米彩盈;一種確定高圓簧橫向剛度的有效方法[J];西南交通大學(xué)學(xué)報(bào);1998年03期

相關(guān)博士學(xué)位論文 前1條

1 姜偉;基于約束拓?fù)渥儞Q的大規(guī)模復(fù)雜多剛體系統(tǒng)振動(dòng)分析[D];華中科技大學(xué);2008年

，

本文編號(hào)：2209030