基于EMD和HHT的航空发动机转子-机匣振动信号分析  

Rotor-case vibration signal analysis of an aero engine based on EMD and HHT

作　　者：徐可君[1] 秦海勤[1] 江龙平[1] 

机构地区：[1]海军航空工程学院青岛分院航空机械系,青岛266041

出　　处：《振动与冲击》2011年第7期237-240,共4页Journal of Vibration and Shock

摘　　要：将EMD和HHT方法引入航空发动机转子-机匣的振动信号分析,某台发动机的台架实测机匣振动信号的分析结果表明,该方法能够比较清楚地再现转静系统碰摩故障随转速和采样周期的演变过程,能够克服傅里叶谱无法同时获得时域和频域信息的缺陷。同时边际谱与傅里叶谱相比能够比较真实客观地反映系统的频率和幅值分布情况。Here,EMD and HHT were applied to rotor-case vibration signal analysis of an dero engine.The vibration signals from an aero engine when it was in bench tests were analyzed.The results showed that the two methods can clearly reproduce the rubbing fault process between rotor and stator with change of rotating speed and sampling period.They could obtain the rubbing information in time and frequency domains to overcome the shortcoming of Fourier transormation only displaying the information in frequency domain.It also was shown that the marginal spectrum can display the distribution of a system＇s frequency and amplitude more really.

关 键 词：航空发动机 经验模态分析 希尔伯特-黄变换 

分 类 号：V23[航空宇航科学与技术—航空宇航推进理论与工程] TH165.3[机械工程—机械制造及自动化]