The plain circular journal bearings are not found to be stable by researchers when used in high speed rotating machineries. Hence, extensive research in the study of stability characteristics of non-circular bearings or lobed bearings assumed importance, of late. Present article deals with the stability analysis of non-circular offset bearing by taking selected set of input and output parameters. Modified Reynolds equation for micropolar lubricated rigid journal bearing system is solved using finite element method. Two kinds of input parameters namely, offset factors (0.2, 0.4) and aspect ratios (1.6, 2.0) have been selected for the study. The important output characteristics such as load, critical mass, whirl frequency ratio, and threshold speed are computed and plotted for various set of values of input parameters. The results obtained indicate that micropolar lubricated circular offset bearing is highly stable for higher offset factor and higher aspect ratio.

中文翻译：

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微极润滑流体动力偏置半轴颈轴承的动态稳定性

研究人员发现，在高速旋转机械中使用时，滑动圆形轴颈轴承不稳定。因此，最近对非圆形轴承或凸轮轴承的稳定性特性的广泛研究变得很重要。本文通过选取一组选定的输入和输出参数来处理非圆偏心轴承的稳定性分析。采用有限元法求解微极润滑刚性轴颈轴承系统的修正雷诺方程。研究选择了两种输入参数，即偏移因子 (0.2, 0.4) 和纵横比 (1.6, 2.0)。重要的输出特性，如负载、临界质量、涡动频率比和阈值速度是针对输入参数的各种值集计算和绘制的。