| Citation: | GAO Xianghong, JIANG Minghong, ZHANG Peng, et al. Dynamic characteristics of active elastic support dry friction dampers-three support flexible rotor system[J]. Journal of Aerospace Power, 2025, 40（11）：20230791 doi: 10.13224/j.cnki.jasp.20230791
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Dynamic characteristics of active elastic support dry friction dampers (AESDFDs)-three support flexible rotor (TSFR) were studied. First, the dynamic model of AESDFDs-TSFR was established. Then the steady state acceleration response of rotor system was obtained under different normal loads. The vibration reduction effect of switch control method within critical speed region was discussed. Experimental rig for AESDFDs-TSFR was set up. The unbalance responses of TSFR passing the first-second critical speed regions were measured and analyzed. The variations of the vibration amplitude of the turbine disk and the fan disk were analyzed under different normal loads. Experimental results were compared with simulation ones, showing that vibration could be suppressed by the AESDFDs under unbalance excitation. Each AESDFD had damping effect on the turbine disk and the fan disk by using switch control method within critical speed region, and the maximum vibration reduction ratio at disks reached 98.6% and 98.9%, respectively. The results could provide a theoretical guide for vibration control strategy design on the AESDFDs-TSFR system.
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