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工程力学  2014 

航空发动机支承不同心转子系统力学模型研究

Keywords: 航空发动机,支承不同心,Lagrange能量法,转子动力学,非线性振动

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Abstract:

针对实际的航空发动机低压转子系统中的支承不同心问题,在对其结构特征及受力变形情况进行分析的基础上,建立了多支点、柔性转子系统的动力学模型,利用Lagrange方法分别获得了不同结构下的转子系统运动微分方程。结果表明,对于多支点的柔性转子系统,支承不同心所带来的动力学影响因转子的结构特征而异,一方面会使连接结构的刚度呈现非线性,另一方面又有可能给系统带来附加的2倍频激振力,从而使响应出现1倍频以外的其他频率分量。

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