大型旋转机械是石油、化工、航空、电力、冶金等工业的核心装备。其转子系统具有大跨度、柔性、重载等特点，运行在恶劣的工作环境下，遭受固、流、热等多种激励源的作用，使其成为整个系统中的故障敏感部位。转子多源振动故障频发，振动愈加复杂，如不及时有效抑制，最终导致事故、造成巨大损失。项目研究多源激励下旋转机械转子系统的多源振动及抑制问题，采用解析和有限元相结合的混合建模法，建立虑及故障源特性的转子系统动力学模型；揭示多源激励导致的耦合故障模式对转子振动响应及非线性电磁力对转子动力学特性的影响规律；探索激励源特性参数、电磁抑制力及系统振动响应间的内在关系，建立基于电磁力的转子轴向多空间位置及多频率成分振动的多目标靶向抑制方法；搭建实验台，进行多源激励下转子多源振动响应特性及靶向抑制实验研究，为旋转机械转子振动故障诊治以及大型旋转机械的安全、高效、稳定和长周期运行提供理论和技术支撑。

Rotating machinery is the core equipment of the petroleum production and refining, aviation, power and metallurgical industry. The rotors of the unit with large span, flexibility and heavy load, becomes the fault-prone part in the unit because it runs in the harsh working environment, excited by multiple excitation sources, such as flow, solid and heat sources. It is often happened that the complex vibration of rotors caused by the multi-excitation, for instance rotor imbalance, misalignment and rubbing force, and it takes great economic losses to the power enterprises if the vibration would not be suppressed timely and effectively. This project studies the response and suppression of the complex vibration for the rotors excited by multi-excitation in rotating machinery. The dynamic model of the rotor-bearing system considered the characteristics of multi-excitation is established using the analytic and finite element method. On this basis, the effect of the coupling failure caused by the multi-excitation on rotor vibration response is revealed. And the influence of dynamic characteristics of the rotors excited by nonlinear electromagnetic force is researched. The relationship among the excitations, controlling force and the corresponding response in the rotor-bearing system is explored. The target controlling theory about the rotor vibration is clarified, and the target controlling method for the multi-position and multi-frequency vibration of rotor is proposed. This project aims to provide theoretical and technical support to solve the problem of vibration caused by the multi-excitation, such as rotor imbalance, misalignment and rubbing force. And it will ensure the safety and long-period running of the rotating machinery.