中文摘要：

建立了椭圆滑动轴承的油膜力力学模型，并采用基于Sommerfeld数的滑动轴承转子系统稳定性分析方法分析了该模型。利用量纲一运行参数up得到不同椭圆度误差的滑动轴承的稳定性临界曲线。结果表明：滑动轴承轴颈的椭圆度误差对滑动轴承转子系统有显著影响。

英文摘要：

An oilfilm force model of a hydrodynamic journal bearing allowing for ovality errors was established. And the model was analyzed based on Sommerfeld number. The stability map of hy- drodynamic journal bearings with roundness errors can be ploted using a dimensionless parameter op. The research shows that the ovality errors of hydrodynamic journal bearings have significant effects on the stability of hydrodynamic journal bearing systems.