Volume 43 Issue 3
Mar.  2024
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YAN Hong, LIU Zhengqiang, JIANG Qinchen, REN Hongfei. Study on Vibration Characteristics of Accessory Transmission System of an Engine Under Cyclic Impact Excitation[J]. Mechanical Science and Technology for Aerospace Engineering, 2024, 43(3): 438-445. doi: 10.13433/j.cnki.1003-8728.20220274
Citation: YAN Hong, LIU Zhengqiang, JIANG Qinchen, REN Hongfei. Study on Vibration Characteristics of Accessory Transmission System of an Engine Under Cyclic Impact Excitation[J]. Mechanical Science and Technology for Aerospace Engineering, 2024, 43(3): 438-445. doi: 10.13433/j.cnki.1003-8728.20220274

Study on Vibration Characteristics of Accessory Transmission System of an Engine Under Cyclic Impact Excitation

doi: 10.13433/j.cnki.1003-8728.20220274
  • Received Date: 2022-03-04
  • Publish Date: 2024-03-25
  • Considering the difficulty of dynamic modeling of accessory transmission system in a turboprop engine, based on the substructure global coupling matrix method, the dynamic model of the coupling system of main rotor and accessory transmission system is established by synthesizing and extending the dynamic model of coaxial multi-rotor coupling system and skew spiral bevel gear coupling multi-rotor subsystem, and the dynamic equations are derived. The variable order Adams-Bashforth-MoutlonPECE algorithm is used to solve the dynamic equation, and the dynamic responses of the system under different cyclic impact load spectra are obtained. The vibration characteristics of the aero-engine main rotor and accessory coupling system are studied. The results show that the shock excitation produced by the cyclic impact load spectrum has a great influence on the vibration characteristics of the system. Because the transmission torque of the third stage gear pair is larger, and the running stability of the helical gear pair is worse than that of the spiral bevel gear pair, the maximum normal relative displacement, the mean value of the maximum dynamic load coefficient and the root mean square of the maximum normal vibration acceleration of the helical gear pair under two kinds of alternating loads all occur on the helical transmission helical gear pair. The vibration of all gear pairs along the normal direction is periodic, and a load cycle contains multiple meshing periods at the same time.
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