【摘要】：氣浮軸承具有高轉(zhuǎn)速、小振動等優(yōu)點，都較好的滿足了現(xiàn)代社會對加工精度的高要求，與滾珠軸承與液體軸承相比，在高精密領(lǐng)域、航空航天領(lǐng)域、醫(yī)療領(lǐng)域、光學(xué)領(lǐng)域等各行各業(yè)都有著不可替代的優(yōu)越性和實用性。隨著氣浮軸承的廣泛應(yīng)用，對其靜、動態(tài)特性的分析也顯得越來越重要。本課題試圖通過對氣浮軸承的動態(tài)特性的理論研究，為實際生產(chǎn)實踐帶來一些分析途徑和指導(dǎo)方法。 對軸承動態(tài)特性進(jìn)行分析時，雷諾方程中時間效應(yīng)項不能被忽略。針對這個問題，本文中，首先運用時間離散的方法，對含時間效應(yīng)項雷諾方程進(jìn)行化簡，再運用加權(quán)余量法結(jié)合有限元的方法對化簡后雷諾方程進(jìn)行離散。 然后，對軸承——轉(zhuǎn)子系統(tǒng)進(jìn)行動力學(xué)分析，對柱渦及錐渦兩種運動形式分別建立數(shù)學(xué)模型，并考慮它們的相互影響對氣膜厚度進(jìn)行了分析。 之后，運用弱耦合的方法，將雷諾方程與動力學(xué)方程聯(lián)系起來，，循環(huán)迭代求解。運用Matlab編寫雷諾方程與動力學(xué)方程求解程序，根據(jù)弱耦合求解過程，獲取仿真數(shù)據(jù)。根據(jù)得到的仿真結(jié)果，對轉(zhuǎn)速、質(zhì)量偏心、轉(zhuǎn)子質(zhì)量等影響系統(tǒng)穩(wěn)定性的因素進(jìn)行分析。 最后，結(jié)合非線性理論，通過轉(zhuǎn)子軌跡法和分岔方法，對系統(tǒng)動態(tài)特性進(jìn)行進(jìn)一步仿真分析。 本文通過與實際情況及理論分析的結(jié)合，最終定性的驗證了化簡過程、建模方法及弱耦合求解思路的正確性。
[Abstract]:Air bearing has the advantages of high speed, small vibration and so on. It can meet the high requirement of machining precision in modern society. Compared with ball bearing and liquid bearing, air bearing is in high precision field, aerospace field, medical field, etc. Optical field and other industries have irreplaceable advantages and practicability. With the wide application of air bearing, it is more and more important to analyze its static and dynamic characteristics. Through the theoretical study of the dynamic characteristics of the air bearing, this paper attempts to bring some analytical approaches and guiding methods for the practical production practice. When analyzing the dynamic characteristics of bearing, the time effect term in Reynolds equation can not be ignored. In order to solve this problem, in this paper, firstly, the Reynolds equation with time-effect term is simplified by using the method of time discretization, and then the Reynolds equation is discretized by the method of weighted residual method and finite element method. Then, the dynamic analysis of the bearing-rotor system is carried out, and the mathematical models of the cylindrical vortex and the conical vortex are established respectively, and the thickness of the gas film is analyzed considering the interaction between them. Then, by using weakly coupled method, the Reynolds equation is connected with the dynamic equation, and the cyclic iterative solution is obtained. The Reynolds equation and dynamics equation are solved by Matlab, and the simulation data are obtained according to the weak coupling solution process. According to the simulation results, the factors affecting the stability of the system, such as speed, mass eccentricity and rotor mass, are analyzed. Finally, combined with nonlinear theory, the dynamic characteristics of the system are further simulated and analyzed by rotor trajectory method and bifurcation method. By combining with the actual situation and theoretical analysis, this paper qualitatively verifies the correctness of the simplification process, modeling method and weakly coupled solution.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH133.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 許羿;質(zhì)點系相對于任意動點的動量矩定理[J];重慶交通學(xué)院學(xué)報;1995年03期

2 楊建剛;環(huán)形間隙內(nèi)振動圓柱流固耦合動力特性研究[J];東南大學(xué)學(xué)報(自然科學(xué)版);2005年01期

3 胡超,王立國,黃文虎,夏松波;轉(zhuǎn)子軸承系統(tǒng)渦動的穩(wěn)定性分析[J];哈爾濱工業(yè)大學(xué)學(xué)報;2001年01期

4 呂書清;;不同油膜力模型轉(zhuǎn)子系統(tǒng)的非線性動力學(xué)分析[J];哈爾濱商業(yè)大學(xué)學(xué)報(自然科學(xué)版);2010年03期

5 朱華征;范大鵬;張文博;馬東璽;;質(zhì)量不平衡力矩對導(dǎo)引頭伺服機構(gòu)性能影響分析[J];紅外與激光工程;2009年05期

6 陳予恕,吳志強;非線性模態(tài)理論的研究進(jìn)展[J];力學(xué)進(jìn)展;1997年03期

7 張新江,劉曉麗,李光輝;轉(zhuǎn)子-軸承系統(tǒng)的非線性動力學(xué)的研究[J];汽輪機技術(shù);2002年01期

8 陳予恕;曹登慶;吳志強;;非線性動力學(xué)理論及其在機械系統(tǒng)中應(yīng)用的若干進(jìn)展[J];宇航學(xué)報;2007年04期

9 李朝峰;王得剛;劉杰;聞邦椿;;非線性轉(zhuǎn)子-軸承系統(tǒng)的動力學(xué)降維分析與試驗研究[J];振動與沖擊;2009年08期

10 張新江,高N

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