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| Optimal design of concentrated force diffusion for short shell structure using hierarchical radial ribs |
| Received:December 04, 2012 Revised:February 05, 2013 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201402001 |
| KeyWord:tank short shell structure concentrated force diffusion multi-objective optimization |
| Author | Institution |
| 张家鑫 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
| 王博 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
| 牛飞 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
| 程耿东 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
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| Abstract: |
| During the structural design of space rocket,fuel tanks are usually bearing large concentrated forces due to their special form of connection.Traditional radial ribs of short shell structure are used to decrease the damage by diffusing the concentrated forces,but the actual effect is not ideal.Our present work based on the concept of topology optimization and actual bearing environment and manufacturability propose a kind of "hierarchical radial ribs" structure of short shell.Considering the engineering requirements of the stiffness,strength,weight loss,stability and diffusion effect of concentrated forces,a multi-objective optimization model using NSGA-Ⅱ genetic algorithms is established.Optimized Pareto fronts in multi-objective optimization are obtained using concurrent optimization strategy integrated shape and sizing optimization.By contrast of three levels,two levels,one level and traditional radial ribs design,the advantages and effects of hierarchical radial ribs has been sufficient validated,and then a finally optimal design is selected meeting the actual requirements. |
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