Abstract
In order to realize the lightweight design of the underwater vehicle (UUV) pressure shell, a mathematical model was established based on the finite element analysis results of the structure, which took the minimum mass as the objective function and the limit stress and strain as the constraint conditions. The sample points were obtained by Latin hypercube sampling method (LHD), and the Kriging surrogate model was constructed. The variation trend of target variables with structural parameters was analyzed. Finally, the global optimal solution was searched by multi-objective genetic algorithm (MOGA). Compared with the initial scheme, the optimized shell weight is reduced by 5.91% and the maximum stress is reduced by 22.97%, thus achieving the goal of weight reduction. The research results can provide reference for the structural optimization design of the UUV pressure shell, and the research method can also be applied to the lightweight design of other parts of the UUV, which has practical engineering guidance significance.
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