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中文摘要：
针对航空发动机整机振动，建立了一种新型转子一滚动轴承一机匣耦合动力学模型。该模型具有如下特点：1）考虑转子、滚动轴承及机匣之间的耦合作用；2）考虑了实际航空发动机的弹性支承及挤压油膜阻尼效应；3）将转子考虑为等截面自由欧拉梁模型，运用模态截断法进行分析；4）考虑了滚动轴承间隙、非线性赫兹接触力以及变柔性VC（Varying Compliance）振动；5）考虑了转子与机匣之间的碰摩故障。运用数值积分方法获取了系统响应，研究了航空发动机的整机振动规律。
英文摘要：
In this paper, aiming at the practical whole aero-engine vibration, a new rotor-ball bearing-stator coupling system dynamic model is established. The main characteristics of the new model are as follows： 1） the coupling effect between rotor, ball bearing and stator is considered fully; 2） the flexible support and the squeeze film damper （SFD） are considered; 3） the rotor is considered as Equisection Euler Free Beam model, and its vibration is analyzed through cutting limited modes; 4） nonlinear factors Of ball bearing are modeled, such as the clearance of bearing, nonlinear Hertzian contract force, and the varying compliance; 5） rubbing fault between rotor and stator is considered. In this paper, the numerical integral method is employed tO obtain system＇ s responses, and the whole aero-engine vibration characteristics are studied.
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