Abstract:

There is inevitable unbalance in the dualrotor system of the aeroengine, the beat vibration will occur to engine when two rotors are operating at approximately the same speed. The beat vibration will induce unacceptable level of vibration amplitude. The beat vibration is studied for a dualrotor system in this paper. Some features, such as the beat vibration periodicity, intensity of beats and counterrotating characteristic, are analyzed in order to disclose the mechanics and distinction of the beat vibration.

Key words: dualrotor , system,  , beat , vibration,  , speed , difference,  , initial , phase,  , signal , intensity