Rotary excitation test method for thin-wall drum of aero-engine

The invention belongs to the field of aero-engine excitation tests, and relates to a rotary excitation test method for a thin-wall drum of an aero-engine, and the method comprises the steps: pasting strain gauges on the surface of an outer wall drum body of a three-stage drum, the roots of labyrinth teeth and the tooth tips of the labyrinth teeth, carrying out the assembly of a test rotor, and then enabling a simulation turbine shaft head to be in butt joint with a test platform. The vibration response of the thin-wall drum in a resonance rotating speed range is obtained in a vibration transmission mode by applying excitation load of a specific engine order to a three-stage disc real blade of the rotating thin-wall drum; then, damping fins are installed on the inner wall of the third-stage drum in the circumferential direction, a second round of rotary excitation test of the thin-wall drum in the damping state is carried out, and the vibration response of the thin-wall drum in the resonance range is obtained