【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。更多还原

【Abstract】 Based on the nonlinear dynamics theory,the model of high-speed rotor-bearing system with rub-impact was studied.The vibration characteristics of rotor-bearing system rubbing with journal bearing supports were educed.The effect of eccentricity parameter on system vibration characteristics was studied.The system response was gained by using numerical integral method based on the dynamics model of rotor-bearing system with rubbing fault.The changing rules for system responses along with the rotating speed and eccentric distance were studied by use of response curve,bifurcation curve and waterfall figure.The study is helpful for diagnosing effectively the rub-impact fault between rotor and journal bearing supports,reducing occurence rate of fault and improving dynamics characteristics of rotor systems.更多还原