To enhance the thrust-to-weight ratio and fuel efficiency of an aero-engine,the clearance between the ro-tor and the casing is reduced,increasing the likelihood of rubbing faults.This paper investigates the vibration char-acteristics of a dual-rotor system experiencing rubbing.According to the characteristics of nonlinear springs in rotor supports and rubbing faults,a nonlinear dual-rotor model with rubbing faults is initially constructed.The nonlinear vibration characteristics of the system are then analyzed using nonlinear vibration theory.Simulations are conducted to examine the changes in vibration energy after the occurrence of rubbing faults and to determine when the system will leave the rubbing state,utilizing nonlinear energy supply functions.The characteristics of nonlinear vibration and their inducing mechanism are analyzed based on the transfer process of vibration energy tracks.The research demonstrates that the rotor experiment aligns closely with the value simulations,theoretical analysis results,and vi-bration energy tracks.Additionally,the study reveals the change in vibration patterns when the nonlinear dual-rotor system operates and further analyzes the vibration characteristics of the dual-rotor system.
关键词
双转子系统/非线性恢复力/非线性振动/碰摩故障/能量空间分析/能量轨道/轨道迁移/实验
Key words
dual-rotor system/nonlinear restoring force/nonlinear vibration/rubbing fault/energy space analysis/energy track/track transfer/experiment
维普
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