The first stage fan rotor blade is a key component of the engine against bird impact

and the leading edge of the blade is a key part of the anti-bird impact design

by investigating the structural characteristics of the engine and the damage characteristics after bird impact. Therefore

a theoretical analysis method of fan blade bird impact was established to study the relationship among impact conditions

structural parameters and bird impact process

and damage mode as well as damage degree. Results show that the leading edge angle is the key structural parameter of anti-bird impact. The leading edge angle determined the impact process

damage mode and damage degree

when the bird impact conditions were determined. A model with leading edge characteristics was designed and the influence rule of leading edge angle was verified using the method of display dynamics simulation analysis. Based on the results

an improved design of the actual fan blade was carried out. The deformation of improved blade was reduced by a minimum of 33% after being hit by a bird

and the anti-bird impact ability of the improved blade was obviously improved.