摘要
针对用于多孔质气体静压轴承的多孔质石墨结构的复杂性,从其结构形成机理出发,利用分形几何理论, 对多孔质气体静压轴承性能的影响起至关重要作用的渗透率进行研究,并建立多孔质石墨渗透率与其分形维数之间的定量关系,使多孔质石墨的宏观参数与微观结构建立联系。利用Matlab软件编写的程序,对多孔质石墨的组织结构进行分析,确定孔隙的分形维数,通过模型求得多孔质石墨的渗透率,并通过试验验证了模型的正确性。
The microstructure of graphite used to the porous aerostatic bearing is greatly complicated. From the formative mechanism of microstructure, the fractal geometry theory is adopted to study the permeability, which is very important to the performance of porous aerostatic bearing. Furthermore, the relation between the porous graphite permeability and the fractal dimension is established. And the correlation of the macroscopical parameter with the microstructure is presented. Finally, the microstructure of the porous graphite is analyzed by the program of Matlab and the permeability is obtained. The experimental results agree with the theoretical results.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2006年第B05期74-77,共4页
Journal of Mechanical Engineering
关键词
静压轴承
多孔质石墨
孔隙度
渗透率
Static bearing Porous graphite Porosity Permeability
