School of Aerospace Engineering;
Xiamen University;
Xiamen 361005;
China;
School of Energy and Power Engineering;
Beihang University;
Beijing 100083;
China;
Army Aviation Institute;
Beijing 100000;
China;
Aero Engine Academy of China;
Beijing 101300;
China;
AECC Commercial Aircraft Engine Co;
Ltd;
Shanghai 200241;
China;
Multi Island Genetic Algorithm; Stress concentration; Structural optimization; Sub-model method; Vent hole;