Gun Tail Gun Latch Structure Of The Multi-objective Optimization And Robust Design

Based on the nonlinear finite element and structural optimization, this thesis mainly researches the theory of structural optimization and robust design and its application in the optimal design of gun breech.Research include the following aspects: 1)A finite element model of the breech mechanism is established and computed; 2)The method of parameterized modeling of finite element of structure through a universal CAE software(ABAQUS) is researched, and parameterized modeling of the breech mechanism is accomplished using the method. 3) ABAQUS and optimization are integrated into iSight optimization software's platform. The gun breech structure is optimized on multi-objective with Neighborhood Cultivation Genetic Algorithm (NCGA). The optimization result is satisfied. It combines the parameterized modeling with the Genetic Algorithm (GA) for multi-objective optimization based on the Pareto-optimum. 4) Accordancing with the design requirements of gun breech, this multi-quality-target robust design process has been practiced on structure design of gun breech. 5)The 3-D geometry and finite element model of the assembly of the gun breech is set up in terms of the most robust and optimized structural parameters. Static finite element analysis is performed. Comparison of stress and displacement of the initial gun breech with those of the optimized one is made, which indicates that the stress concentration that leads to fatigue failure in the optimized structure is eliminated. Parameter of the sensitivity is descended after robust design. The optimization objective is obtained.Success in optimizing the breech mechanism shows that the method and technology for optimal design and Taguchi Methods of gun breech structural system put forward in this thesis is effective and practical. This method can be used to solve the practical problems of the corresponding.