中文摘要：

关于气体轴承承载能力优化问题。为增大静压气体轴承的承载能力，提高轴承的刚度，设计了一种扇形沟槽表面节流式静压气体轴承，并运用计算流体力学软件Fluent计算轴承的性能，分析几何参数对轴承性能的影响。结果表明，在一定气膜厚度下，增大节流面积可显著提高承载能力，增大节流槽长度可以增加轴承刚度，而在气膜厚度较小时，均压槽可以同时提高承载能力和刚度。当轴承直径相同时，所设计的静压气体轴承较小孔节流式具有更高的承载能力和更大刚度。

英文摘要：

In order to increase load carrying capacity and stiffness, a new type aerostatic bearing with surface - restrictor was designed in this paper. Moreover, Computational Fluid Dynamic software Fluent was used to calculate the performance of the bearing and the influence of geometrical parameters on the bearing＇ performance is analyzed. The results indicate that load carrying capacity significantly increases with restrictor area in certain film thickness. In- creasing the length of fan - shaped surface restrictor can improve beating stiffness. Furthermore, load carrying capac- ity and stiffness increase simultaneously with even groove in small film thickness. The bearing restricted by surface - restrictor has lar~er load carrvinz caDacitv and stiffness than that with orifice tvne ra~trictor_