Volume 40 Issue 11
Nov.  2025
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LI Shicai, HAO Long, ZHAO Wei, et al. Vibration characteristics of aeroengine spindle direct-drive rotor system with unbalanced magnetic pull[J]. Journal of Aerospace Power, 2025, 40（11）：20240574 doi: 10.13224/j.cnki.jasp.20240574
Citation: LI Shicai, HAO Long, ZHAO Wei, et al. Vibration characteristics of aeroengine spindle direct-drive rotor system with unbalanced magnetic pull[J]. Journal of Aerospace Power, 2025, 40（11）：20240574 doi: 10.13224/j.cnki.jasp.20240574
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Vibration characteristics of aeroengine spindle direct-drive rotor system with unbalanced magnetic pull

doi: 10.13224/j.cnki.jasp.20240574
  • 1.

    Institutes of Engineering Thermophysics，Chinese Academy of Sciences，Beijing 100190，China

  • 2.

    National Key Laboratory of Science and Technology on Advanced Light-duty Gas-turbine，Chinese Academy of Sciences，Beijing 100190，China

  • 3.

    School of Aeronautics and Astronautics，University of Chinese Academy of Sciences，Beijing 100049，China

  • 4.

    Jinan Institute of Advanced Gas-Turbine，Jinan 251410，China

  • 5.

    Beijing Key Laboratory of Distributed Combined Cooling Heating and Power System，Chinese Academy of Sciences，Beijing 100190，China

  • Received Date: 2024-08-19
    Available Online: 2025-07-14
    Abstract

  • To study the influence of startup generator unbalanced magnetic pull (UMP) on the dynamic characteristics of aeroengine spindle direct-drive rotor system under mixed dynamic and static eccentrics, the finite element method was used to establish a finite element model of aeroengine spindle direct-drive multi-disk rotor system, and the Newmark-β method was used to solve the system dynamic equations with consideration of the UMP and unbalanced mass force. The results showed that UMP made the aeroengine spindle direct-drive rotor system vibration amplitude increase significantly when crossing the criticality, and the axis orbit became annular. UMP caused the frequency components such as zero frequency, supply frequency, twice of supply frequency, and its combination frequency appeared in rotor system. With the increase of the initial static eccentricity, the vibration amplitude of the rotor system increased, leading to an increase in the UMP, which aggravated the rotor vibration. But it did not affect the shape of the axis orbit. With the change of the initial eccentricity direction angle, the displacement spectrum in the x direction and y direction changed periodically. The related research results can provide a reference for the vibration identification and control of aeroengine spindle direct-drive rotor system.

     

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