Abstract In the frequent start-up process of aerodynamic bearings, contact easily occurs between journal and bearing bush. In this research, novel hybrid metal rubber-bump foil bearings (MR-BFBs) were proposed. Based on rough surface contact and ultra-thin film lubrication theory, we studied the start-up performances of MR-BFBs. The results showed that the changes in both RSm and Ra caused great changes in the parameters pmax and A0. The increased start-up times led to a decrease in the load ratio Wc/W0 and the total friction coefficient, and an increase in both the linear velocity, the gas film pressure and the minimum gas film thickness. With the increase in the composite roughness, both the critical rotation speed and start-up time exhibited an upward trend.

中文翻译：

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新型混合金属橡胶凸点箔轴承启动性能研究

摘要 气动轴承在频繁的启动过程中，轴颈与轴瓦之间容易发生接触。在这项研究中，提出了新型混合金属橡胶凸点箔片轴承 (MR-BFB)。基于粗糙表面接触和超薄膜润滑理论，我们研究了MR-BFBs的启动性能。结果表明，RSm 和Ra 的变化都会引起参数pmax 和A0 的较大变化。启动时间的增加导致负载比 Wc/W0 和总摩擦系数的降低，以及线速度、气膜压力和最小气膜厚度的增加。随着复合材料粗糙度的增加，临界转速和启动时间均呈上升趋势。