摘要：Traditional coupled multi-disciplinary design optimization based on computational fluid dynamics/computational structure dynamics(CFD/CSD)aims to optimize the jig shape of aircraft,and general multi-disciplinary design optimization methodology is *** special consideration is given to the aircraft itself during the *** main drawback of these methodologies is the huge expanse and the low *** solve this problem,we put forward to optimize the cruise shape directly based on the fact that the cruise shape can be transformed into jig shape,and a methodology named reverse iteration of structural model(RISM)is proposed to get the aero-structural performance of cruise *** main advantage of RISM is that the efficiency can be improved by at least four times compared with loosely-coupled aeroelastic analysis and it maintains almost the same fidelity of loosely-coupled aeroelastic *** optimization framework based on RISM is *** aerodynamic and structural performances can be optimized simultaneously in this framework,so it may lead to the true optimal *** aerodynamic performance was predicted by N-S solver in this *** shows that RISM predicts the aerodynamic and structural performances very well.A wing-body configuration was optimized by the proposed optimization *** drag and weight of the aircraft are decreased after optimization,which shows the effectiveness of the proposed framework.