RESEARCH OF THE AIRCRAFT ENGINE FAN BLADES VIBRATION STATE IN THE ICING CONDITIONS

A.A. Khorickov, S.Y. Danilkin, V.A. Teleshev

Results of the aircraft engine fan blades fluctuations experimental researches by a contactless method at the specialized stand are resulted at imitation of an icing in flight conditions. On the basis of the engine vibrating characteristics spectral analysis results comparison without an icing and during an icing it is shown, that at an icing stability of the fan blades to a flutter is reduced. Therefore, standard bench testing aircraft engines for the lack flutter of the fan rotor blades recommended to supplement the tests with simulated icing conditions. With reference to such tests it is necessary to modernize existing aeroelastic processes diagnostics systems.

Key words: icing, flutter, rotor blades, vibration diagnostics, spectral analysis.