摘要：应用非线性动力学理论对高速碰摩转子系统模型进行了研究，得出滑动轴承支撑下的碰摩转子系统的振动特征。研究了偏心距参数对系统振动特性的影响。对建立的碰摩故障的转子系统的动力学模型应用数值积分方法进行求解，得到系统的响应，利用幅频曲线、分岔图、三维谱图研究系统响应随转速、偏心量的变化规律。为准确诊断滑动轴承支撑下的转子碰摩故障、减小系统故障发生率和提高系统动力学特性具有重要意义。

ABSTRACT：Based on the nonlinear dynamics theory, the model of high-speed rotor-bearing system with rub-impact is studied. The vibration characteristic of rubbing rotor-bearing system with journal bearing supports is educed. The effect of eccentric distance parameter is studied on the system vibration characteristic. The system response is gained by using of the numerical integral method for the dynamics model of rotor-bearing system with rubbing fault. The change law of system response along with rotate speed and eccentric distance is studied by using of response curve, bifurcation curve, waterfall figure. This study has important significance for diagnosing effectively the rotor rub-impact fault with journal bearing supports, reducing fault ratio and improving the dynamics characteristic of the rotor system.