| Citation: | CHEN Wei, WU Zeyu, HAN Jiaqi, et al. Test on vibration characteristics of rotor system under sudden base shock excitation[J]. Journal of Aerospace Power, 2023, 38（4）：878-888 doi: 10.13224/j.cnki.jasp.20210537
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A rotor-supporting-casing system test rig was designed to investigate the vibration response of turbofan rotor in time domain and frequency domain under sudden base shock excitation during the process of landing, based on the equivalence principle of structural characteristics of the typical low bypass ratio turbofan engine. Results showed that sudden base shock excitation led to significant impact on rotor, the aggravation of rotor’s transient response, the positive and negative precession and flexural resonance. The amplitude ratio of the disk of rotor system increased nonlinearly with the increase of the impact velocity of base, and the longitudinal sudden base shock excitation had more influence on the vibration characteristics of the rotor system than the transverse sudden base shock excitation.
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