| Citation: | NIE Weijian, YANG Xiaoguang, TANG Guang, et al. Vibration characteristics experiment of aero-engine rotor under sudden base impact load[J]. Journal of Aerospace Power, 2025, 40（3）：20240462 doi: 10.13224/j.cnki.jasp.20240462
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A full-scale rotor system test rig was designed to investigate the vibration response of the aero-engine rotor under sudden base impact load during the process of landing, based on the dynamic similarity principle and structural feature similarity principle. An experiment method for the vibration characteristics of aero-engine rotor under sudden base impact load driven by high-speed motor on the vibration and shock table was proposed. The vibration response characteristics of the rotor under axial and vertical impact loads were obtained. The influences of impact parameters, such as impact speed, impact load size, impact direction, and impact pulse width, on rotor vibration response were studied through experiments. Experimental results showed that when the rotor system received sudden base impact load, the vibration response increased significantly, and then returned to the stable state before impact. The frequency components of instantaneous vibration response were complex, and there were irregular frequency components other than the fundamental frequency. In addition, the impact parameters had significant impact on the vibration response of the rotor, and special attention should be paid to the vertical vibration response. The study can provide a reference for the vibration characteristics experiment and structural safety design of aero-engine rotor under sudden base impact load thanks to its important engineering application value.
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