Abstract
The excitation terms of flexure flutter of blades and pulsation pressure of compressing airflow after resonance of blades on torsional frequency are investigated. Two subsystems of axial turbocompressor take part in a flutter: stage rotor blades having compressed airflow have the different dynamic characteristics. Unstable processes develop in them with the time-shift. For an axial turbocompressor in the advancing growth of oscillation energy of the individual rotor blades and energy of pulsation modes of flow pressure relative to the oscillation energy of other rotor blades appears, implying a short time lag of oscillation synchronization of the blades with the flexure flutter. Time alignment and scaling of records of the blades oscillations and flow pressure pulsations signal that the pressure pulsations of airflow are the excitation source of flexure flutter of the blades.
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