基于代理模型的航空发动机部件复材化设计

Composite design is an important way to improve the thrust to weight ratio of Aeroengines. However， due to the variability in lay-up angles and sequences， it is difficult to determine the optimal lay-up scheme for each structure in the cascade. Therefore， the design of composite material reverse thrust cascades was carried out. Firstly，the sample points were designed by genetic algorithm，and finite element analysis of composite structures with different lay-up schemes was performed. Secondly，the surrogate model was established， and the deformation， strength and stiffness under the working load of each characteristic structure in the reverse thrust cascade was taken as the targets， and finite element analysis was carried out for different lay-up schemes after optimization， and the optimal lay-up scheme was obtained by comprehensive comparison. Finally， the composite reverse thrust cascade models were modeled according to the optimal lay-up scheme and compared with the aluminum alloy reverse thrust cascade model to verify the superiority of the selected lay-up scheme.