分别建立了轴向载荷作用下正置正交薄壁加筋圆柱壳结构优化设计的数学模型和有限元分析模型,应用Ansys软件进行优化计算,讨论了外载荷、材料屈服极限对优化设计的影响,以及结构参数对薄壁加筋圆柱壳结构的临界载荷和屈曲模式的影响。基于有限元分析的研究结论,发展了一种薄壁加筋圆柱壳结构优化设计方法,给出设计算例的优化结果,并将两种方法的优化设计结果进行比较。建立的数学模型物理意义清晰,能有效地对薄壁加筋圆柱壳结构进行优化设计,与有限元模型得到的结果相比符合较好,而后者具有更好的适用性,易于在Ansys软件平台实现。 The mathematical model and finite element analysis model of the optimal design of the normal orthogonal thin-wall reinforced cylindrical shell under axial load are established respectively. The optimal design is carried out with Ansys software. The influence of external load and material yield limit on the optimal design is discussed , And the influence of structural parameters on the critical load and buckling mode of thin-walled stiffened cylindrical shell structures. Based on the research conclusions of finite element analysis, an optimized design method for the thin-walled stiffened cylindrical shell is developed. The optimization results of the design example are given and the results of the two methods are compared. The established mathematical model has a clear physical meaning and can effectively optimize the structure of the thin-walled stiffened cylindrical shell, which is in good agreement with the results obtained by the finite element model. The latter has better applicability and is easy to be used on the Ansys software platform achieve.