Journal of Shanghai Jiaotong University ›› 2020, Vol. 54 ›› Issue (2): 186-192.doi: 10.16183/j.cnki.jsjtu.2020.02.010

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Lightweight Design for Improving Aeroengine Fan Blade Impact Resistance Capability

CHAI Xianghai 1,2,ZHANG Zhinan 3,YAN Jun 4,LIU Chuanxin 1,2   

  1. 1. AECC Commercial Aircraft Engine Co., Ltd., Shanghai 200241, China; 2. Shanghai Branch of China Institute of Aeronautical Research, Shanghai 200241, China; 3. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 4. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116085, Liaoning, China
  • Published:2020-03-06

Abstract: In order to improve the impact resistance of fan blades, this paper optimizes the innovative configuration design of fan blades with the constraint of the hollow ratio. The feasibility rationality of the optimized solution was verified through the processing of test pieces and performance evaluation. The static equivalent method of transient impact load was established to obtain the optimal mass distribution of the fan blade that can effectively resist bird impact load under working conditions. Based on the optimization results, the fan blade topology optimization was reconstructed, and the geometric configuration of fan blade with low mass and high impact resistance was established. Based on 3D printed fan blade to optimize the configuration test sample, the feasibility of the processing technology and the mechanical properties of the optimized configuration of fan blades were evaluated by 3D printing. The process reliability, static force and bird impact resistance of the optimized design were verified. The results show that the proposed optimization method can be used for the design of hollow fan blades of aero engine with a hollow ratio of over 45%, and the impact resistance of the blades is significantly improved.

Key words: aero engine; wide-chord fan blade; lightweight design; topological optimization; 3D printing

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