非接触旋转叶片振动测量系统在转子叶片裂纹故障试验中的应用  

Non-contact rotating blade vibration measurement system in rotor blade crack fault test

作　　者：刘美茹[1] 朱靖[1] 滕光蓉[1] 李光辉[1] 

机构地区：[1]中国燃气涡轮研究院,四川江油621703

出　　处：《燃气涡轮试验与研究》2015年第2期45-48,52,共5页Gas Turbine Experiment and Research

摘　　要：采用非接触旋转叶片振动测量系统测量模拟转子叶片振动特性,通过单自由度和周向傅立叶两种分析方法,拟合并计算出叶片共振时的幅值、动频、转速、激励阶次等。试验结果表明,叶片出现裂纹后,叶片动频显著下降。动频结果与锤击法测量叶片静频结果对比表明,动频结果更接近真实情况。该系统可有效识别叶片裂纹,其成功运用对于实现或建立叶片裂纹故障在线监测具有十分重要的意义。Using non-contact rotating blade vibration measurement system, the resonance amplitude, dy-namic frequency, resonance speed and excitation order were obtained with the methods of Single Degree of Freedom （SDOF） Curve Fit and Circumferential Fourier Fit. The results showed that the dynamic frequency of the cracked blade dropped significantly. Compared with the static frequency measured by the hammering method, it showed that the dynamic frequency was closer to the real situation. The system can effectively identify the existence of blade crack. The establishment of the system has great significance to the on-line monitoring technology of the blade crack fault.

关 键 词：非接触旋转叶片振动测量系统 转子叶片 裂纹 振动特性 锤击法 动频 静频 

分 类 号：V263.6[航空宇航科学与技术—航空宇航制造工程]