| Citation: | BAI Yurou, WANG Yongfeng, MA Yanhong, et al. Robustness and mechanical effects of double set tooth connection for large bypass ratio fan rotor[J]. Journal of Aerospace Power, 2025, 40（7）：20240124 doi: 10.13224/j.cnki.jasp.20240124
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Using the finite element method, a robustness assessment was conducted for a double-tooth connection structure in a high bypass ratio fan rotor. The analysis focused on deformation coordination and interface contact states under various working loads, with special attention being paid to extreme conditions like blade loss. The model considered the clearance between double set tooth centering surfaces and assessed its impact on the rotational inertia excitation loads. Results indicated that under normal working loads, the large bypass ratio engine fan experienced minimal impact on interface contact characteristics. However, blade loss induced significant lateral loads, causing rotor tilt and generating substantial contact stress in the sleeve tooth connection, reaching up to 2.5 times normal working load. Furthermore, clearance fit of tooth centering surfaces can lead to tilt in the inertia spindle, generating rotational inertia torque excitation, increasing rotor vibration response, and amplifying dynamic loads on the fulcrum.
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