应用模态分析及傅里叶变换的柔性转子无试重动平衡方法

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (11) : 7-10,2.

论文

应用模态分析及傅里叶变换的柔性转子无试重动平衡方法

章云1，梅雪松1,2，邹冬林1，姜歌东1，张东升1

作者信息 +

A field balancing method of flexible rotors based on modal analysis and fourier transform

ZHANG Yun1, MEI Xue-song1,2, ZOU Dong-lin1, JIANG Ge-dong1, ZHANG Dong-shen1

Author information +

文章历史 +

摘要

针对旋转机械不平衡导致的振动问题，提出一种的柔性转子现场动平衡方法。其通过有限元理论建立转子系统动力学模型，并将系统运动微分方程按模态振型展开，利用FFT及IFFT变换，获取频域下不平衡载荷谱，最终识别转子不平衡状态。仿真和试验结果均表明，该方法仅需在低于临界转速的状态下采集振动响应数据，并且无需停机试重，就能准确识别转子不平衡状态，添加配重后可使转子各阶不平衡振动得到有效抑制。

Abstract

A field balancing method of flexible rotors is presented to suppress vibration from imbalance. In this method, rotor system dynamic model is established with FEM theory, and the differential equation of motion is expanded with the system mode shapes. By using FFT and IFFT transform, the unbalanced load spectrum in frequency domain is acquired, and then the rotor imbalance was eventually identified. Simulation and experimental results show that this method can identify the rotor imbalance accurately, which only needs to collect data of vibration response below critical speed without trial weights. Adding the counterweight, the imbalance vibration in each steps frequency of the rotor can be effectively suppressed.

导出引用

章云;梅雪松;邹冬林;姜歌东;张东升. 应用模态分析及傅里叶变换的柔性转子无试重动平衡方法[J]. 振动与冲击, 2012, 31(11): 7-10,2

ZHANG Yun;MEI Xue-song;ZOU Dong-lin;JIANG Ge-dong;ZHANG Dong-shen. A field balancing method of flexible rotors based on modal analysis and fourier transform [J]. Journal of Vibration and Shock, 2012, 31(11): 7-10,2