航空发动机双转子系统的拍振分析  

Research on Beat Vibration of Dual-rotor for Aero-engine

作　　者：韩军[1] 高德平[1] 胡绚[1] 陈高杰 

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016 [2]总装工程兵科研一所,江苏无锡214035

出　　处：《航空学报》2007年第6期1369-1373,共5页Acta Aeronautica et Astronautica Sinica

基　　金：中国博士后基金(2005037728);江苏省博士后基金

摘　　要：在双转子航空发动机中,由于转子系统不可避免地存在不平衡量,当两个转子的转速比较接近时,发动机会出现拍振现象,拍振将引起振动强度过大问题。对双转子系统的拍振进行了研究,分析了拍振的周期性、信号强度及其反向转子特性,阐明了拍振产生的机理和特征,并采用数值仿真和试验对拍振进行了定量分析和验证。研究表明,拍振与双转子转速差和不平衡量的相位因素有关,当转速差小于工作转速的20%时,双转子系统拍振信号的强度较大。There is inevitable unbalance in the dual-rotor system of the aero-engine, the beat vibration will occur to engine when two rotors are operating at approximately the same speed. The beat vibration will induce unacceptable level of vibration amplitude. The beat vibration is studied for a dual-rotor system in this paper. Some features, such as the beat vibration periodicity, intensity of beats and counter-rotating characteristic, are analyzed in order to disclose the mechanics and distinction of the beat vibration. The characters of beat vibration are quantitatively analyzed and verified by numerical analysis and experiment. The results show that the beat is related to the speed difference of the dual-rotor and two rotors’unbalanced phases. The beat vibration usually becomes noticeable when the speed difference between two rotors speed is less than 20% of the operating speed.

关 键 词：双转子系统 拍振 转速差 初相位 信号强度 

分 类 号：V235[航空宇航科学与技术—航空宇航推进理论与工程]