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首页> 外文会议>Proceedings of the Twelfth International symposium on magnetic bearings. >The Dynamic Characteristic of Rotor-Active Magnetic Bearings System on Flexible Base subjected to Base Vibration
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The Dynamic Characteristic of Rotor-Active Magnetic Bearings System on Flexible Base subjected to Base Vibration

机译：基座振动作用下柔性基座上转子－主动电磁轴承系统的动力学特性

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摘要

Magnetic bearings are the core and key technology of a multi-electric engine. The aero engine will have no lubrication system, less weight, high reliability and efficiency, and low maintenance costs if magnetic bearings be used instead of rolling bearings. Many papers had been published research results on rotor-AMB system on ground based support, which can not better describe the real condition of aero engine. This paper models the rotor-active magnetic bearing (AMB) system hanging from a cantilever beam to simulate the effect of flexible wing on the rotor dynamic characteristics. Besides, in order to observe the effect of wing vibration on the engine rotor, the beam’s free end receives excitation and the frequency response of rotor is analyzed. From simulation analysis result, it can be found that change of hanging position results in change of the base spatial modal properties (Mand K). Consequently, the modal frequency of some rotor shapes changes irregularly. Under the same excitation conditions, imposed on the flexible base (as opposed to a rigid foundation), the rotor frequency response slightly decreased except in the beam type modal frequencies.
机译：电磁轴承是多电机发动机的核心和关键技术。如果使用电磁轴承代替滚动轴承，航空发动机将没有润滑系统，重量更轻，可靠性和效率更高，维护成本也较低。在地面支撑的转子-AMB系统上已经发表了许多论文，这些论文不能更好地描述航空发动机的真实情况。本文对悬臂梁上悬挂的转子-主动磁轴承（AMB）系统进行建模，以模拟柔性翼对转子动力学特性的影响。此外，为了观察机翼振动对发动机转子的影响，梁的自由端受到激励，并分析了转子的频率响应。从仿真分析结果可以发现，悬挂位置的变化导致基本空间模态特性（Mand K）的变化。因此，某些转子形状的模态频率会不规则地变化。在相同的激励条件下，施加在柔性基座上（而不是刚性基座），除梁型模态频率外，转子频率响应会略有下降。

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