Combination Resonance of Aero-engine Compressor Blade with a Breathing Crack under Displacement Excitation of Rotor Shaft

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (18) : 87-93.

HAN Gang CHEN Yushu

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Abstract

The amplitude-frequency response of combination resonance of a aero-engine compress blade with a breathing crack under the lateral displace excitation of the rotor shaft was investigated. The blade was simplified into a single degree of freedom system using Galerkin’s method. The first order equation of the resonance response under the parametric excitation combining with the displacement excitation was obtained by using Multi-scale method. The effects of the opening and closing depth of crack, the location of lateral section with the crack and the displacement amplitude of the rotor shaft on the amplitude-frequency response of this resonance were analyzed. The obtained results show that it is the effective measures for preventing fatigue of the blade to control the changes of the above mentioned parameters which has a great influence on the dynamic behavior.

Key words

compressor blade / breathing crack / combination resonance / Galerkin's method / Multi-scale method

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HAN Gang CHEN Yushu. Combination Resonance of Aero-engine Compressor Blade with a Breathing Crack under Displacement Excitation of Rotor Shaft[J]. Journal of Vibration and Shock, 2015, 34(18): 87-93

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