Resonance Reliability Analysis of Aeroengine Compressor Rotor Blade

Abstract:

To describe the frequency distribution of the rotor blades and improve the optimization, resonance reliability of the rotor blades was analyzed in this paper. Considering the variety of rand-om variables, we jointly used finite element method and response surface method. The Campbell diagram was set up to describe blade resonance by analyzing the compressor rotor blade vibration characteristics. For the second-order vibration failure of the rotor blade, we considered the impact of random variables with the rotor blade material, the blade dimension and the rotor speed. The pro-bability distribution and allowable reliability of the second-order vibration frequency was calculated, and the sensitivity of the random variables influencing vibration frequency was completed. The res-ults show that the resonance reliability with the confidence level 0.95 of the rotor blade are = 0.99753 with the excited order =4 and =0.99767 with the excited order =5,and basically ag-ree with the design requirements when the rotor speed =9916.2, and the factors mainly affe-cting the distribution of the second-order vibration frequency of the blades include elastic modulus, density and the rotor speed, with the sensitivity probabilities 35.09%,34.56% and 24.15% respecti-vely.

• Periodical: Applied Mechanics and Materials (Volume 472)
• Pages: 79-84
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.472.79
• Online since: January 2014
• Authors: Hai Feng Gao, Guang Chen Bai
• Keywords: Compressor Blade, Probability, Reliability, Sensitivity, Vibration Frequency

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