Unbalance Response of a Flexible Rotor Supported by a Squeeze Film Damper
Unbalance Response of a Flexible Rotor Supported by a Squeeze Film Damper
复制标题
挤压油膜阻尼器支持的柔性转子的不平衡响应
DOI：
10.1115/1.2893824
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
L. McLean
中科院分区：
文献类型：
--
作者：
J. Y. Zhao;I. Linnett;L. McLean
研究了安装挤压油膜阻尼器的柔性转子的不平衡响应。对同心阻尼器和偏心阻尼器的运行进行了研究。计算结果与实验结果的比较表明，‘0’膜模型优于‘π’膜模型。在第一销-销临界转速附近，‘0’油膜模型低估了阻尼器的阻尼力，高估了阻尼器的集中力。通过在理论模型中选择较低的膜破裂压力，得到了与实验结果较好的匹配。结果表明，空气夹带效应会产生非定常响应和软弹簧式的跳跃现象。结果表明，膜破裂压力恒定的阻尼器模型并不能真实地反映挤压油膜阻尼器中的空化问题。
This paper investigates the unbalance response of a squeeze film damper-mounted flexible rotor. Both concentric and eccentric damper operations are examined. Comparison between predicted and experimental results shows that the '0' film model is preferred to the 'π' film model. Near the first pin-pin critical speed the '0' film model underestimates the damping effect and overestimates the centralizing force of the damper. By choosing a lower film rupture pressure in the theoretical model, better matches to the experimental results are obtained. The effects of air entrainment are shown to produce unsteady responses and jump phenomena of softening spring type. It is concluded that damper models having constant film rupture pressures do not truly represent the cavitation problem in squeeze film dampers.