拉杆松弛导致预紧失谐组合转子性能退化研究

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摘要由结构损伤导致性能退化角度出发，分析拉杆松弛引起的预紧失谐组合转子性能退化特性。利用跨尺度计算方法获得轮盘界面接触刚度并对接触界面等效处理，提出考虑粗糙界面及预紧的组合转子动力学建模方法。在此基础上进行组合转子动力学分析，获得组合转子固有频率随时间变化规律；建立以组合转子频率相对降低量表征其性能退化量的定量评估方法，对退化数据进行处理并描述组合转子退化轨迹，实现拉杆松弛引起的组合转子性能退化定量评估；对初始预紧失谐程度相同的组合转子进行不平衡响应分析，获得预紧失谐组合转子退化特征。结果表明，组合转子性能退化量参数服从指数函数分布，负失谐对组合转子不平衡响应影响较大。

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	苏永雷 1
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	王艾伦 1
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	曾海楠3

关键词 ：拉杆松弛, 组合转子, 退化量, 失谐, 固有频率

Abstract：Combined rotor is the key part of engine, it is important to reveal degradation mechanism and assess the performance degradation degree for making maintenance during operation. Performance degradation characteristics of combined rotor were discussed, from the perspective of performance degradation caused by structural damage. Firstly, dynamic features of combined rotor was analyzed which considering rod relaxation and interface contact effect, the relations that natural frequency change with time was obtained. Then, by defining degradation degree of combined rotor, degradation path was described through dealing with degradation data, degradation assessment was completed as well. In the end, unbalance response of combined rotor was conducted based on same mistuning degree of preload; degradation characteristics of combined rotor were obtained. The results show that: degradation parameters of combined rotor have exponential distributions, and negative mistuning has great effect on unbalance response amplitude of combined rotor.

Key words： rod relaxation combined rotor degradation degree mistuning natural frequency

收稿日期: 2014-03-25 出版日期: 2015-10-25

引用本文:

苏永雷 1,2，王艾伦 1,2，曾海楠3. 拉杆松弛导致预紧失谐组合转子性能退化研究[J]. 振动与冲击, 2015, 34(20): 21-26.
SU Yong-lei1,2，WANG Ai-lun1,2，ZENG Hainan3 . Performance degradation research of mistuning combined rotor considering rod relaxation. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(20): 21-26.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2015/V34/I20/21

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