| Citation: | WANG Dong, HAN Zhuoluo, YANG Zhefu, et al. Influence of unsymmetrical stiffness of joints on high-speed rotor dynamic characteristics[J]. Journal of Aerospace Power, 2024, 39（12）：20220995 doi: 10.13224/j.cnki.jasp.20220995
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A breathing model considering the effect of rotor whirl motion was established. Based on the Euler beam theory, a lumped parameter modeling method of the dual-rotor system taking asymmetric joint stiffness into account was proposed, and experiments on an aero-engine dual-rotor system supported by intermediate bearing was conducted. The results showed that the combination of two excitation frequencies appeared in the rotor response spectrum. The amplitude of the combination frequency could increase when the rotational speed was in the vicinity of the coupled vibration modes frequency, which may damage the supporting structures.
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