Dynamic Stress Recognition of Dangerous Mode and Vibration Reduction Analysis in Thin-Walled Spiral Bevel Gear

Thin-walled spiral bevel gears exhibit multiple resonance speeds within the operation speed range in high-speed accessory transmission systems, and it is crucial for the overall health of the transmission system to identify the dangerous vibration modes and to reduce web dynamic stress (WDS). To address this issue, we propose the single-mode dynamic stress recognition (SM-DSR) method which establishes a single-mode forced response (SMFR) model for identifying dangerous vibration modes based on prestressed modal analysis and traveling wave vibration (TWV) analysis, and the proposed method is validated through finite element method (FEM). Furthermore, an additional ring damper is introduced to modify the SMFR model based on friction energy dissipation analysis under TWV conditions. Moreover, the dynamic stress high-speed experiment platform is established to validate the effectiveness of the proposed method and the vibration reduction capability of the ring damper. This study provides a theoretical foundation for identifying dangerous vibration modes and utilizing ring damper for vibration reduction of thin-walled spiral bevel gears in the field of aviation engines.