本文選題：多孔質(zhì)氣浮軸承　切入點(diǎn)：分形理論　出處：《天津大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：氣浮軸承廣泛運(yùn)用于航天、精密制造領(lǐng)域的超精密機(jī)械及測(cè)量裝備上，利用多孔材料制成的氣浮軸承與其他類型的氣體靜壓軸承相比能夠提供更高的承載力和剛度，因而多孔質(zhì)氣浮軸承受到了廣泛的關(guān)注。本文對(duì)多孔材料的滲透率計(jì)算進(jìn)行了理論分析，同時(shí)對(duì)滲透率不同的多孔材料制成的多孔質(zhì)氣浮軸承進(jìn)行了大量的實(shí)驗(yàn)并對(duì)多孔氣浮軸承的特性進(jìn)行研究，主要完成的工作和結(jié)果如下： （1）多孔材料的滲透率是多孔質(zhì)氣浮軸承的關(guān)鍵參數(shù)，因此對(duì)滲透率的計(jì)算尤為重要，針對(duì)本課題所使用的多孔材料，，研究利用分形理論計(jì)算多孔材料滲透率的可行性，表面三維形貌為研究多孔材料的結(jié)構(gòu)參數(shù)提供了基礎(chǔ)，本文理論計(jì)算了該材料的分形維數(shù)和孔隙通道的迂曲維數(shù)以及材料的滲透率，利用多孔材料滲透率的實(shí)際測(cè)量值對(duì)理論分析結(jié)果進(jìn)行驗(yàn)證。 （2）為研究多孔材料的微結(jié)構(gòu)，本文提出了一種針對(duì)性的算法，由于本文的多孔材料是由大量直徑成正態(tài)分布的銅顆粒倒入圓柱形的容器內(nèi)再經(jīng)過施加巨大的載荷壓縮而成，因此可利用計(jì)算機(jī)軟件Matlab對(duì)銅顆粒的堆疊狀態(tài)進(jìn)行三維模擬，在該過程中考慮了銅顆粒堆疊的邊界條件及平衡條件，對(duì)模擬結(jié)果分析進(jìn)一步得到了多孔材料的結(jié)構(gòu)信息。 （3）搭建多孔材料滲透率的測(cè)量平臺(tái)，測(cè)量了多孔材料的滲透率，同時(shí)對(duì)比多孔材料表面未加工與加工時(shí)的滲透率，研究了不同的加工工藝對(duì)多孔材料滲透率的影響。 （4）對(duì)多孔氣浮軸承加載實(shí)驗(yàn)裝置進(jìn)行改進(jìn)，對(duì)多孔質(zhì)氣浮軸承進(jìn)行加載實(shí)驗(yàn)，測(cè)量其在不同加載力下的工作性能，并且針對(duì)同一多孔氣浮軸承，對(duì)其表面進(jìn)行研磨，對(duì)比研磨前后的軸承承載力的變化，同時(shí)研究多孔材料滲透率的不均勻性對(duì)多孔氣浮軸承的整體工作性能的影響，測(cè)量每個(gè)局部塊的不同方向上的滲透率同時(shí)完成了對(duì)多孔材料整體滲透率的擬合，根據(jù)實(shí)驗(yàn)結(jié)果對(duì)平均孔隙大小不同的多孔質(zhì)氣浮軸承的振動(dòng)現(xiàn)象進(jìn)行研究。 上述研究不僅能夠?yàn)槎嗫踪|(zhì)氣浮軸承的研究制造提供理論和實(shí)驗(yàn)依據(jù)，而且也為類似的多孔材料的分形維數(shù)及滲透率的計(jì)算提供基礎(chǔ)。
[Abstract]:Air bearing is widely used in aerospace, precision manufacturing field of ultra-precision machinery and measuring equipment. Air bearing made of porous materials can provide higher bearing capacity and stiffness than other types of aerostatic bearings. Therefore, porous air bearing has attracted wide attention. In this paper, the permeability calculation of porous materials is theoretically analyzed. At the same time, a large number of experiments were carried out on porous air bearing made of porous materials with different permeability, and the characteristics of porous air bearing were studied. The main work and results are as follows:. The permeability of porous material is the key parameter of porous air bearing, so it is very important to calculate the permeability. In view of the porous material used in this paper, the feasibility of using fractal theory to calculate the permeability of porous material is studied. The 3D surface topography provides the basis for studying the structural parameters of porous materials. In this paper, the fractal dimension, the tortuous dimension of pore channels and the permeability of porous materials are calculated theoretically. The theoretical analysis results are verified by the measured values of permeability of porous materials. In order to study the microstructure of porous materials, a new algorithm is proposed in this paper. Because the porous materials in this paper are composed of a large number of copper particles of normal distribution, which are poured into a cylindrical container and then compressed by a huge load. Therefore, the computer software Matlab can be used to simulate the stacking state of copper particles. The boundary conditions and equilibrium conditions of the stacking of copper particles are considered in the process, and the structural information of porous materials is obtained by analyzing the simulation results. The permeability of porous materials was measured by using a platform to measure the permeability of porous materials. The influence of different processing processes on permeability of porous materials was studied by comparing the permeability of porous materials with that of non-machined and processed porous materials. 4) improving the loading experimental device of porous air bearing, carrying out loading experiment on porous air bearing, measuring its working performance under different loading forces, and grinding its surface for the same porous air bearing. Comparing the bearing bearing capacity before and after grinding, and studying the influence of permeability inhomogeneity of porous material on the overall working performance of porous air bearing. The permeability of each local block was measured in different directions and the whole permeability of porous material was fitted. According to the experimental results, the vibration phenomenon of porous air bearing with different average pore size was studied. These studies can not only provide theoretical and experimental basis for the study and manufacture of porous air bearing, but also provide a basis for the calculation of fractal dimension and permeability of similar porous materials.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH133.35;TB383.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 易家明,徐學(xué)蘭;多孔質(zhì)靜壓氣體軸承材料的研究[J];軸承;1985年01期

2 阮宏慧;張大衛(wèi);景秀并;;多孔質(zhì)徑向氣體靜壓軸承運(yùn)動(dòng)穩(wěn)定性分析[J];軸承;2006年09期

3 林彬;劉峰;張曉峰;;基于多孔質(zhì)節(jié)流器的水潤(rùn)滑動(dòng)靜壓軸承的設(shè)計(jì)[J];軸承;2007年01期

4 于雪梅;孫雅洲;盧澤生;;局部多孔質(zhì)氣體靜壓圓盤止推軸承壓力分布的有限元計(jì)算[J];軸承;2009年12期

5 杜金名;多孔質(zhì)氣體靜壓軸承在三軸轉(zhuǎn)臺(tái)設(shè)計(jì)中的應(yīng)用[J];中國(guó)工程科學(xué);2005年01期

6 王建敏;戴一帆;李圣怡;;局部多孔質(zhì)氣浮止推軸承特性研究[J];國(guó)防科技大學(xué)學(xué)報(bào);2007年06期

7 李小川;施明恒;;多孔介質(zhì)通道的分形隨機(jī)行走描述[J];工程熱物理學(xué)報(bào);2010年03期

8 盧澤生,杜金名,孫雅洲;影響空氣靜壓多孔質(zhì)止推軸承靜態(tài)性能的因素[J];哈爾濱工業(yè)大學(xué)學(xué)報(bào);2001年06期

9 杜金名,盧澤生,孫雅洲;圓板型多孔質(zhì)止推軸承中幾種分析模型的比較[J];航空精密制造技術(shù);2002年05期

10 田富竟;尹自強(qiáng);王建敏;彭永華;;多孔質(zhì)節(jié)流空氣靜壓軸承靜態(tài)性能實(shí)驗(yàn)研究[J];航空精密制造技術(shù);2011年05期

相關(guān)博士學(xué)位論文 前2條

1 于雪梅;局部多孔質(zhì)氣體靜壓軸承關(guān)鍵技術(shù)的研究[D];哈爾濱工業(yè)大學(xué);2007年

2 張曉峰;大行程超精密工作臺(tái)關(guān)鍵技術(shù)研究[D];天津大學(xué);2008年

相關(guān)碩士學(xué)位論文 前2條

1 饒河清;基于FLUENT軟件的多孔質(zhì)靜壓軸承的仿真與實(shí)驗(yàn)研究[D];哈爾濱工業(yè)大學(xué);2006年

2 董乙霏;多孔質(zhì)氣體靜壓軸承靜態(tài)性能分析[D];天津大學(xué);2007年

本文編號(hào)：1619760