Research of Synthesis Optimization of Wing Based on NASTRAN

The method of structural synthesis optimization with flutter constraint in the theoretical design phase of wing is studied.The aerodynamics is analyzed using subsonic doublet lattice method and the flutter is analyzed using v-g method.The optimization objective is minimal mass and the design variable is ply parameter of skin.The structural synthesis optimization design of a certain composite swept backward wing is accomplished.The design satisfies static strength requirement,and the flutter performance has a prodigious improvement.The result can be referred to in the engineering design.