基于非接触转子振动测试的转子行波分析  

Rotor blades travelling-wave analysis based on non-contact vibration measurement

作　　者：张岩松 张东明 邱大明 李成刚 刘洋 ZHANG Yansong;ZHANG Dongming;QIU Daming;LI Chenggang;LIU Yang(Shenyang engine Research Institute,Aero Engine Corporation of China,Shenyang 110015,China)

机构地区：[1]中国航空发动机集团有限公司沈阳发动机研究所

出　　处：《振动与冲击》2019年第20期25-30,共6页Journal of Vibration and Shock

摘　　要：在非接触转子振动测试系统中,以离散化傅里叶变换为理论基础,建立了对航空发动机整级转子叶片振动频率的分析方法,得到整级转子叶片在静坐标系下的振动频率,结合相同试验条件下应变计对转子叶片动态频率的测试结果,实现了航空发动机转子的行波振动分析。在某压气机试验中,整级转子叶片在转速12 343 r/min时,静坐标系下的振动频率为1 752.7 Hz,转子坐标系下的振动频率为926.4 Hz,通过对测试结果的分析,得到了压气机转子的4节径前行波振动特性,结合压气机转子振动的坎贝尔图得到频率裕度和转速裕度。This paper describes application of a non-contact vibration measurement and analysis method,which is based on discrete Fourier transform analysis of the vibration frequency of engine all-blades in a stage.By comparing the stage vibration frequency of all-blades in the stationary reference frame with the vibrations frequency in the rotating reference frame,the travelling wave structures of the engine rotor were analyzed in detail.According to the measurement of blades vibration in the compressor experimental,the vibration frequency is 1752.7 Hz in the stationary reference frame and 926.4 Hz in the rotating reference frame respectively at the speed of 12343 r/min,forming a four-nodal-diameter forward travelling wave.The frequency and speed margin were obtained by further connecting the travelling wave with the Campbell diagram of compressor rotor vibration.

关 键 词：非接触 离散化 傅里叶变换 转子叶片 行波振动 节径 

分 类 号：O329[理学—一般力学与力学基础] V235.13[理学—力学]