本文针对潜艇普通环肋圆柱壳结构设计的特点，建立了潜艇普通环肋圆柱壳结构尺寸优化的数学模型，并考虑到在该结构设计中存在的不确定因素，进行了结构的模糊优化设计。采用约束非线性混合离散变量优化方法，直接获得离散变量的最优解，无需作规格化处理。算例表明本文方法简便实用，结果合理 In this paper, according to the characteristics of the structural design of ordinary ring-stiffened cylindrical shell of submarine, a mathematical model of submarine cylindrical structure optimization of ring-stiffened cylindrical shell is established. Considering the uncertainties in the structure design, fuzzy optimization design of the structure is carried out. The constrained non-linear hybrid discrete variable optimization method is used to directly obtain the optimal solution of discrete variables without the need of normalization. The example shows that this method is simple and practical and the result is reasonable