为了获得某汽轮机转子-轴承系统的动力学特性,并验证其可靠性.采用有限元法,通过对汽轮机转子-轴承系统进行等效简化,建立了汽轮机转子-轴承系统动力学分析模型,在此模型上对汽轮机转子-轴承系统进行转子动力学分析,包括模态分析、临界转速计算以及不平衡响应分析,分析结果表明该转子-轴承系统结构临界转速安全裕度满足要求,转子系统选取的平衡量具有较小的振动幅值,转子-轴承系统设计具有合理性,并对转子-轴承系统安全运行提供了实时监测的依据.%The dynamic analysis of rotor-bearing system has been done by the FEM, which has calculated the natural frequency, critical speed and the unbalanced rotor response for validating the reliability of the rotor-bearing system. The separation margin of the critical speed satisfies the design request. The unbalanced response of the rotor has lower amplitude and provides the foundation to the safe operation of the rotor-bearing system.
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