【摘要】 以普通轴 轴承系统为研究对象,采用数值仿真方法研究了轴 轴承系统在冲击载荷、正弦载荷、旋转载荷等变载荷作用下系统动力学响应,发现变载荷作用下的普通轴 轴承系统也存在共振行为,并提出了轴 轴承系统两种共振频率的确定方法。分析结果表明:轴 轴承系统的自然频率与轴颈转速、轴承间隙和润滑油粘度有关;当外载荷作用频率与轴 轴承系统自然频率相同时,系统将产生共振;共振时轴承的最大油膜压力显著增大,而最小油膜厚度显著减小。更多还原

【Abstract】 By using numerical simulation method, the dynamic response of shaft-bearing system exciting with the variable loads of impact, sine and rotating excitation are studied. It is found that the shaft-bearing system can be resonated by the excitation. The resonance frequency of shaft-bearing system is evaluated with frequency-sweeping method. It is shown that the resonance frequency has relation with the shaft revolving speed, bearing clearance, lubricant viscosity. While resonating, the maximum oil pressure of bearing is noteablly increased and the minimum oil thickness remarkablly decreased.更多还原