基于改进非支配排序遗传算法的纵横加筋圆柱壳多目标优化  

Multiobjective optimization design of longitudinal-transverse stiffened cylindrical shell

作　　者：李学斌[1] 潘治[1] 甘霖[1] 

机构地区：[1]武汉第二船舶设计研究所,武汉湖北430064

出　　处：《舰船科学技术》2008年第4期37-39,60,共4页Ship Science and Technology

摘　　要：加筋圆柱壳广泛用于航天、航空和船舶领域,它在静力作用下的设计得到了广泛的研究。针对水下纵横加筋圆柱壳设计时多个性能指标要求,基于改进非支配排序遗传算法,建立了纵横加筋圆柱壳的多目标优化模型。考虑跨度中点处壳板纵剖面上的中面应力、肋骨应力和结构重力为目标函数,约束条件考虑强度和稳定性指标以及材料的几何特性。通过设定遗传算法参数,给出了Pareto解集,并分析了不同材料参数和工作水深对结果的影响。决策者可以根据决策偏好,选择最后的折中方案。Stiffened shell with rings and stringers are widely used in many areas. The characteristics of them under static pressure are studied by many researchers. A multiobjective optimization model of longitudinal-transverse stiffened cylindrical shells under hydrostatic pressure is developed based on muhiobjective design requirements. The objectives are 2 strength stresses and weight of shells. After choosing parameters of non-dominated sorting genetic algorithm （NSGA-Ⅱ） , the Pareto optimization solutions are acquired then. The effects of material parameters and depth in water on objectives are studied in present analysis. The final design solution can be obtained using preference method introduced by decision maker.

关 键 词：遗传算法 多目标优化 纵横加筋 圆柱壳 

分 类 号：U661[交通运输工程—船舶及航道工程]