航空发动机拍振问题研究与验证  

Experimental validation of the beat vibration of aero-engine

作　　者：丁小飞[1,2] 廖明夫 彭丹阳[3] 韩方军 DING Xiaofei;LIAO Mingfu;PENG Danyang;HAN Fangjun(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China;Shenyang Engine Research Institute,Aero Engine Corporation of China,Shenyang 110015,China;Shenyang Liming Aero Engine Corporation Limited,Aero Engine Corporation of China,Shenyang 110043,China)

机构地区：[1]西北工业大学动力与能源学院,西安710072 [2]中国航发沈阳发动机研究所,沈阳110015 [3]中国航发沈阳黎明航空发动机有限责任公司,沈阳110043

出　　处：《航空动力学报》2023年第11期2639-2647,共9页Journal of Aerospace Power

摘　　要：结合拍振理论仿真分析、实测振动信号分析和工程实际拍振总结,讨论了航空发动机存在的3种多源拍振模式;建立了拍振故障识别流程和排除方法。工程试验验证表明:对于航空发动机常见的3种多源耦合拍振模式,当激振频率相差大于3%时,即可消除多源拍振及其引起的振动值波动问题。所建立的流程和方法在某型发动机振动波动问题排故中进行了应用验证,准确识别出低压转子2倍频-高压转子基频耦合拍振。通过控制规律微调低压转子转速,使低压转子2倍频和高压转子基频相差3%,消除了拍振引起的振动波动,验证了研究结论的正确性。Combined with theoretical simulation of the beat vibration,analysis of the measured vibration signal and summary of the actual vibration elimination experience,three multi-source beat vibration modes of aero-engines were discussed.The identification process and the elimination method of the beat vibration fault were established.Experimental verification showed that for the three common multi-source coupling beat modes,the multi-source beat vibration and the vibration fluctuation could be eliminated when the multi-source excitation frequency differed by more than 3%.The proposed process and method were implemented and verified in engine beat vibration and fluctuation trouble-shooting,and the low-pressure rotor 2 times frequency-high-pressure rotor fundamental frequency coupled beat vibration was accurately identified.The low-pressure rotor speed was well-tuned through the control schedule to separate the above two frequencies by 3%.The vibration fluctuations caused by beat vibration was eliminated and the proposed method was validated.

关 键 词：振动 多源激振 拍振 振动波动 激振频率 

分 类 号：V231.96[航空宇航科学与技术—航空宇航推进理论与工程]