轴压薄壁加筋圆柱壳结构优化设计研究  

DESIGN AND OPTIMIZATION RESEARCH ON RIB-STIFFENED THIN CYLINDRICAL SHELL UNDER AXIAL LOADING

作　　者：毛佳[1] 江振宇[1] 陈广南[1] 张为华 

机构地区：[1]国防科技大学航天与材料工程学院,长沙410073

出　　处：《工程力学》2011年第8期183-192,共10页Engineering Mechanics

摘　　要：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。Both mathematical and parameterized FEM （Finite Element Method） optimization models for an orthogonal rib-stiffened thin cylindrical shell under axial loading were established, and the calculations were done using Ansys software package. In addition to the effects of the loads and yielding limits of materials upon the optimization design, the effects of structural parameters upon the buckling loads and modes were also discussed. An optimization design method based on parameterized FEM analysis was developed accordingly; sample optimization design using this method was compared with calculations of the previous mathematical method. The mathematical model possesses legible physics sense as far as the design of rib-stiffened thin cylindrical shell is concerned. Results obtained through the two methods show satisfying accordance, further, the latter method based on FEM models possesses better adaptivity and can be utilized conveniently with Ansys software package.

关 键 词：薄壁结构 加筋圆柱壳 优化设计 临界载荷 屈曲模式 参数化模型 

分 类 号：TU391[建筑科学—结构工程] TU392.5