| Citation: | SONG Ziyu, SONG Zhihong, DENG Wangqun, et al. Design method of simulation rotor with curvic couplings-rod based on similarity of pretension state and dynamic characteristics[J]. Journal of Aerospace Power, 2026, 41（4）：20240639 doi: 10.13224/j.cnki.jasp.20240639
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In view of the similarity design problem of curvic couplings-rod rotor system, the structural mechanics’ characteristic similarity design principles and corresponding design parameters were proposed from the aspects of support constraint, rotor geometry configuration, curvic couplings, mass distribution, and assembly pre-tightening, etc. The similarity of rotor pretension states was emphasized, and a design process was formed. A design case was studied based on the actual gas generator rotor, and the similarity of the mechanical characteristics between the simulation rotor and the gas generator rotor structure was verified through simulation analysis and dynamic characteristic experiment. The results showed that the relative design parameters of various structural features of the simulation rotor had an error of less than 5% compared with the actual rotor. The percentage change in the pretension force of the rod at the maximum speed was consistent with the actual rotor, and the critical speed distribution error was within 5%. The critical speed error obtained from experiments and simulations was less than 5%. The simulation rotor had a good similarity with the actual rotor, which verified the effectiveness of this method.
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