Lightweight Design of Aircraft Assembly Jig Based on Deformation Coordination Concept

In this paper,a lightweight design technology and methodology of aircraft assembly jig is studied.Sizing optimization is carried out to ensure the jig rigidity based on the cross-sectional dimensions of the constitutive beams.Considering the structural complexity of the assembly jig,the deformation control of specific positioning points,deformation coordination as well as the discrete values of cross-sectional dimensions,in this paper,we propose a multi-model and multi-load case design optimization method based on the genetic algorithm(GA).This method takes into account the self-assembly manufacturing process of the jig and the product assembly process and aims at solving discrete problems.