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| 基于分枝定界法的环肋圆柱壳优化研究 | |
| 引用本文： | 李学斌. 基于分枝定界法的环肋圆柱壳优化研究[J]. 船舶力学, 2008, 12(5) |
| 作者姓名： | 李学斌 |
| 作者单位： | 武汉第二船舶设计研究所,武汉,430064 |
| 摘 要： | 基于分枝定界方法,研究了环肋圆柱壳静水压力作用下,考虑强度和稳定性约束时重量最轻的混合变量优化设计问题,讨论了强度约束和稳定性约束以及材料、几何参数对优化结果的影响.该方法能够有效求解环肋圆柱壳的混合优化问题,计算量小,精度高;环肋圆柱壳经优化后,壳板的重量比例大约是70%,肋骨重量占30%.并且随壳体的长径比(L/R)变化不大.环肋圆柱壳的优化中,肋骨的应力约束是主要约束,肋骨应力已经非常接近许用应力标准,其他应力、局部和总体失稳压力还有一定的储备. |
| 关 键 词： | 环肋圆柱壳 静水压力 优化设计 分枝定界法 |
Optimal design of ring-stiffened circular cylindrical shell based on branch and bound approach |
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| LI Xue-bin. Optimal design of ring-stiffened circular cylindrical shell based on branch and bound approach[J]. Journal of Ship Mechanics, 2008, 12(5) | |
| Authors: | LI Xue-bin |
| Abstract: | A solution for optimal design of ring-stiffened circular cylindrical shell under hydrostatic pressure based on branch and bound approach is obtained in the present analysis.The effects of strength and buckling constraints,as well as spacing of rings,characteristics of rings on minimum weight are studied.The design variables are thickness of shell wall,spacing of rings and their cross-sectional area and moment of inertia.It is shown that the constraint about strength of ring is the most dominant one,which should be given more consideration in practical design. |
| Keywords: | circular cylindrical shell hydrostatic pressure optimization design branch and bound approach |
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