ABSTRACT
According to the overall design requirements and main technical indexes of the pressure-resistant shell, and referring to the structure of the mature pressure-resistant cylindrical shell, the type of reinforcement of hat-type composite materials is determined. Firstly, a simulation model of stiffened and pressure-resistant cylindrical shell was established by using the finite element software ABAQUS. The static pressure load of the structure was analyzed, and the initial strength and stiffness of the structure were checked. Then, based on the Optimal Latin hypercube design method, sensitivity analysis is performed on the main design variables to identify key test factors and determine the best combination of parameters. On this basis, the ABAQUS and ISIGHT optimization software are integrated, the expected objective function, design variables and constraints are selected, and the Multi-island Genetic Algorithm is used to optimize the hull structure to solve the optimal solution. Finally, the strength of the optimized structure is checked. When the optimal target solution is reached, it is ensured that the optimized structure still meets the ultimate strength of the structure.
