摘要
利用有限元与包络解调方法研究碰摩故障下静子振动信号的变化规律。分析静子振动机理,碰摩时静子受到冲击力作用,会引发静子高频固有振动,提出可采用包络解调法进行碰摩故障的诊断。针对静子结构特点,利用有限元方法进行静子碰摩振动动力学分析,然后进行静子振动信号的包络分析,从而完成分析诊断过程。最后分别进行单点碰摩与局部碰摩故障模拟实验,对实测静子振动信号进行包络解调分析,仿真与实验结果表明静子的高频固有振动信号可以揭示碰摩故障的发生。
The characteristic of stator＇ s vibration signals under rub-impact status was studied through finite element method and envelop analysis. Firstly, the vibration mechanism of the stator was analyzed. Since the pulse force due to rub- impact might lead to stator＇ s resonance, the envelop analysis technique was employed to diagnose the rub-impact faults. Aiming at the structural characteristic of the stator, the finite element method was presented to analyze the vibration perfor- mance of the stator. Secondly, the envelop analysis of the stator＇ s vibration signal was performed, and the rub-impact faults diagnosis was completed. Finally, experiments of one-point rub-impact and local rub-impact were performed and analyzed. Results revealed that the stator resonance envelope signals can recognize the rub-impact faults.
出处
《噪声与振动控制》
CSCD
2013年第6期158-162,共5页
Noise and Vibration Control
关键词
振动与波
静子振动
有限元
动静碰摩
包络解调
vibration and wave
vibration of stator
finite element method
static and dynamic rub-impact
envelop analysis
