基于叶尖定时的旋转叶片同步振动辨识新方法  

New method for identifying rotating blades synchronous vibration based on tip-timing

作　　者：欧阳涛[1] 郭文力[2] 段发阶[1] 李孟麟[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072 [2]中国医科大学附属盛京医院放射科,沈阳110004

出　　处：《振动与冲击》2011年第8期249-252,257,共5页Journal of Vibration and Shock

基　　金：国家自然基金资助(50375110);教育部新世纪优秀人才支持计划资助(NECT)

摘　　要：为掌握旋转叶片在不同工作转速下的振动特性,利用叶尖定时测振系统对旋转叶片进行振动测试。分析了基于变速扫频测量的速矢端迹法理论,设计了一种多传感器辨识叶片同步振动的新方法。运用该方法对某型号航空设备的旋转叶片进行振动测量实验,准确地辨识出不同转速下旋转叶片的振动倍频、动频、振幅及阻尼系数等参数。频率和振幅辨识重复性精度分别高达0.007 2 Hz和5.7μm。正确绘制出叶片振动坎贝尔图,实验辨识结果与叶片理论设计结果基本一致。In order to command the vibration characteristics of rotating blades at different rotating speeds, the blades vibration was tested by use of BTF （blade-tip-timing） system. Speed-vector-end-tracking method based on varying speed measurement was analyzed in theory. A new method for identifying blades synchronous vibration was designed and applied to a certain model of aerial equipment in experiment. The vibration parameters such as engine-order, dynamic frequency, amplitude and damping coefficient were identified exactly. The identifying repeatability accuracies of the frequency and amplitude are up to 0.0072Hz and 5.71~m respectively. The blade Campbell diagram was drawn correctly. The experimentally identified results are in accord with the theoretically designed results of the hlad~_

关 键 词：叶尖定时 旋转叶片 同步振动 倍频遍历 

分 类 号：TK14[动力工程及工程热物理—热能工程] V216.2[航空宇航科学与技术—航空宇航推进理论与工程]