Identification of High-Speed Gear Traveling Wave Resonance Based on Phase Space Reconstruction Method

High-speed thin-walled gears are widely used in the aviation geared drivetrain, but they face the threat of traveling wave resonance (TWR). Therefore, it is necessary to identify them, and this paper proposes a method based on phase space reconstruction, called phase space characterization of resonance (PSCOR). High-speed gearing experiments are designed to verify this method. Besides, for the experimental gear, its instantaneous displacement and dynamic stress in the TWR state are analysed. The results show that the TWR of high-speed gears can be accurately identified by the PSCOR method. And when the TWR occurs, gear’s displacement and stress fields rapidly rotate, whose speeds depend on the resonant frequency. Furthermore, the petaloid distribution of high stress fits the mode shape with nodal diameters, and its fast movement leads to the alternating stress with high frequency.