高速转子分布式不平衡量无试重识别方法

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摘要为有效抑制分布式不平衡量所导致的转子故障振动，提出一种高速转子分布式不平衡量识别方法，该求解方法无需试重，且振动测试过程可在低于临界转速下进行。首先，通过扩展影响系数动平衡方法与转子动力学模型的比较分析，得出了动力学传递函数与影响系数之间的关联关系；其次，基于有限元动力学模型结点，实现了分布式不平衡具体描述，通过增加振动测试转速的方式，实现了动力学传递函数矩阵的满秩，进而给出了分布式不平衡量的求解公式；最后，在转子动平衡实验平台上进行了实例验证，结果表明：按该方法识别的不平衡量进行配重校正后，转子临界转速前后残余振动比动平衡前降幅非常明显，验证了该方法所识别不平衡量的准确性。

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	章云1
	胡振邦2
	梅雪松2

关键词 ：高速转子, 分布式不平衡, 不平衡识别, 无试重

Abstract：

To avoid the vibration induced by distributed imbalance, an identification method without trial weights of distributed imbalance for high speed rotors, which only need to collect vibration data below the first critical speed, is presented. First, the relationship between the dynamics transfer function and the influence coefficients was identified based on the dynamics analysis and the extended influence coefficients principle. Second, the mass eccentricity curve of distributed unbalance was described by the nodes in finite element model, and then, a formula to solve the distributed unbalance imposing on each finite element model node was derived from the full rank of dynamics transfer matrix, which was obtained by increasing the speed. Finally, the experiment analysis was performed on a flexible rotor test rig, and the results demonstrated that the magnitude of the vibration during the first order critical speed was reduced significantly after adding the correcting weights, which implied that the distributed unbalance could be identified accurately by the proposed method.

Key words： high speed rotors distributed imbalance imbalance identification without trial weights

收稿日期: 2015-11-11 出版日期: 2017-02-15

引用本文:

章云1，胡振邦2，梅雪松2. 高速转子分布式不平衡量无试重识别方法[J]. 振动与冲击, 2017, 36(4): 28-31.
ZHANG Yun1，HU Zhenbang2，MEI Xuesong2. An identification method of distributed imbalance without trial weights for high speed rotors. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(4): 28-31.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I4/28

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