High-speed, light-weight and high-load gearing is widely used in the transmission systems of modern aero-engines. Some dynamic phenomena, such as the traveling wave resonance, can be more easily encountered. It generally occurs quite suddenly and causes catastrophic accidents. This study presents an experimental investigation of the signal characteristics of the gear fatigue fracture process caused by the traveling wave resonance. The acoustic waveguide system and the dynamic calibration system are developed. The traveling wave resonance monitoring test and the fatigue performance test of the central drive bevel gear in an aero-engine are carried out. The results show the traveling wave resonant frequency and rotational speed of the driven bevel gear are identified and monitored effectively by the acoustic waveguide system. The dangerous rotational speeds range and the sound pressure energy radiated of the vibration are discussed. The results reveal the gear resonant phenomena are narrow rotational speed band sensitivity and more dangerous at high speed. The fracture mode of the driven bevel gear of aero-engine is reproduced. When the gear has initial defects and works within the dangerous rotational speed of the traveling wave resonance, the gear fatigue fracture will occur quickly. The harmonic frequency, the frequency of forward traveling wave (FTW) and backward traveling wave (BTW), and their combination frequency will appear alternately in the noise spectrum of the gear before fatigue fracture.

高速、轻量化、高负荷的传动装置广泛应用于现代航空发动机的传动系统中。一些动态现象，例如行波共振，更容易遇到。它通常发生得非常突然并导致灾难性事故。本研究对行波共振引起的齿轮疲劳断裂过程的信号特性进行了实验研究。开发了声波导管系统和动态校准系统。开展了航空发动机中央传动锥齿轮行波共振监测试验和疲劳性能试验。结果表明，声波导管系统对从动锥齿轮的行波谐振频率和转速进行了有效的识别和监测。讨论了危险的转速范围和振动辐射的声压能。结果表明，齿轮共振现象是转速带敏感性较窄，高速时更危险。再现了航空发动机从动锥齿轮的断裂模式。当齿轮存在初始缺陷并在行波共振的危险转速范围内工作时，会迅速发生齿轮疲劳断裂。谐波频率、正向行波（FTW）和反向行波（BTW）频率及其组合频率将交替出现在齿轮疲劳断裂前的噪声谱中。结果表明，齿轮共振现象是转速带敏感性较窄，高速时更危险。再现了航空发动机从动锥齿轮的断裂模式。当齿轮存在初始缺陷并在行波共振的危险转速范围内工作时，会迅速发生齿轮疲劳断裂。谐波频率、正向行波（FTW）和反向行波（BTW）频率及其组合频率将交替出现在齿轮疲劳断裂前的噪声谱中。结果表明，齿轮共振现象是转速带敏感性较窄，高速时更危险。再现了航空发动机从动锥齿轮的断裂模式。当齿轮存在初始缺陷并在行波共振的危险转速范围内工作时，会迅速发生齿轮疲劳断裂。谐波频率、正向行波（FTW）和反向行波（BTW）频率及其组合频率将交替出现在齿轮疲劳断裂前的噪声谱中。