| Citation: | LIN Qinjie, ZHU Jiazan, XU Ziyang, et al. Structural vibration avoidance method of aerospace thin-spoke plate gearing system under “mechanical-inertial-thermal” loads[J]. Journal of Aerospace Power, 2026, 41（2）：20240390 doi: 10.13224/j.cnki.jasp.20240390
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A numerical model of an aero-engine gear transmission system dynamics under “mechanical-inertial-thermal” loading was constructed by considering the speed and power of each axis of the transmission system, the eccentricity of the shaft end due to the deformation of the casing, the material properties of the gears and the friction of the gear surface. The modal characteristics of the system under the real meshing state, including the bevel gear transmission, were described. The form of transmission of vibration in a high-speed gear chain was supplemented. Various forms of coupling such as pitch-pitch, pitch-vortex, pitch-torsion between gear pairs, pitch-vortex, pitch-pitch and other forms of coupling between duplex or triple shafts and their gears were included. The transfer of the above forms throughout the transmission chain was also included. A study of structural vibration avoidance methods for thin-spoke plate gear drive systems was carried out. It was found that by improving the thickness of the spoke plate of the gears in the transmission system of the aircraft development, the inner diameter of the shaft and other structural parameters, it was possible to achieve a reduction of the maximum value of the vibration stress in the gears of the transmission system by 15% to 59% under the prerequisite that the mass of the transmission system can be increased by only 11%.
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