针对某型飞机飞行时座舱产生的异常振动问题,首先阐述了航空发动机转子系统典型故障的现象及原因;分析了可能引发座舱异常振动的各个激励源,初步判断异常振动的来源;其次通过地面试车试验,采集了座舱异常振动信号及对应的发动机振动信号,提取了座舱异常振动频率的主要能量成份,分析了发动机上各机匣的频谱成份;最后,找出了引发动座舱异常振动的原因,并分析讨论了航空发动机转子系统存在的早期故障及问题,对同类的问题和故障的查找及分析有一定借鉴作用。 Aiming at the abnormal vibration of cockpit of a certain type of aircraft during flight, the typical failure of aeroengine rotor system is expounded first, the reason of the typical failure of aeroengine rotor system is analyzed, the sources of abnormal vibrations that may cause abnormal vibration of cockpit are analyzed, In the experiment, the abnormal vibration signals of cockpit and the corresponding engine vibration signals were collected, the main energy components of the abnormal vibration frequency of the cockpit were extracted and the spectrum components of the engine casing were analyzed. Finally, It also analyzes and discusses the early faults and problems existing in the rotor system of aeroengine, and provides reference for the similar problems and fault finding and analysis.