Use of porous materials in fluid film is well established so as to make more uniform distribution of pressure along the journal surface. The work presented in this paper deals with theoretical examination into the effect of worn bearing surface on the behaviour of a hybrid double layer porous journal bearing system (DLPJBS) operating with power-law lubricants. The governing equation for the flow of non-Newtonian lubricant in the bearing porous clearance space is solved by using the FEM. The effects of non-Newtonian lubricant on the bearing characteristics of a worn bearing have been studied. Findings of this study indicates that the hybrid DLPJBS operating under non-Newtonian lubricant offers enhanced values of $${\bar{h}}_{min}$$ , $${\bar{\omega}}_{th}$$ and rotor dynamic coefficients (stiffness and damping coefficients).

中文翻译：

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考虑磨损和润滑剂非牛顿行为共同影响的双层多孔混合轴颈轴承分析

在流体膜中使用多孔材料是公认的，以便使压力沿轴颈表面分布更均匀。本文介绍的工作涉及对磨损轴承表面对使用幂律润滑剂运行的混合双层多孔轴颈轴承系统 (DLPJBS) 行为影响的理论研究。利用有限元法求解了轴承多孔间隙空间中非牛顿润滑剂流动的控制方程。已经研究了非牛顿润滑剂对磨损轴承的轴承特性的影响。这项研究的结果表明，在非牛顿润滑剂下运行的混合 DLPJBS 提供了 $${\bar{h}}_{min}$$ , $${\bar{\omega}}_{th}$ 的增强值$ 和转子动态系数（刚度和阻尼系数）。