| Citation: | ZHAO Zhenyao, YANG Cheng, ZHANG Qicheng, et al. Dynamic response characteristics of blade lost rotor with fusing structure[J]. Journal of Aerospace Power, 2025, 40（8）：20240327 doi: 10.13224/j.cnki.jasp.20240327
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A rapid vibration response solving method was developed for the fan blade lost rotor system with a fusing structure. The effects of time-varying parameters, such as rotor speed and stiffness, on the vibration response of the rotor system were studied. The intrinsic vibration damping mechanism of the fusing structure was elucidated, and the design principles for fusing structure were proposed based on these findings. The results indicated that the fusing at the #1 support can significantly reduce the first critical speed of the rotor, consequently reducing the resonance response peak when the rotor passed through the critical point. The impact of the speed reduction rate on the dynamic characteristics of rotor with “complete fusing” and “partial fusing” designs differed significantly, necessitating a distinction in design approaches. The stiffness variation duration of the support had a minor effect on the vibration response of the rotor and may be disregarded during the design phase. When the support stiffness reduction rate fell within a certain range, the rotor may approach a resonant state during windmilling operation stage, thus this “resonance zone” should be avoided during design. For complete fusing designs, restoring the stiffness of the support structure during windmilling phase is beneficial for enhancing rotor operational safety, with preferable faster stiffness recovery.
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