计算力学学报Issue(2)：141-148,240,9.DOI:10.7511/jslx201402001
分级型放射肋短壳结构集中力扩散优化设计
Optimal design of concentrated force diffusion for short shell structure using hierarchical radial ribs
摘要
Abstract
During the structural design of space rocket ,fuel tanks are usually bearing large concentrated forces due to their special form of connection .T raditional 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 manufacturabili-ty 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 .关键词
贮箱短壳/集中力扩散/多目标优化Key words
tank short shell structure/concentrated force diffusion/multi-objective optimization分类
数理科学引用本文复制引用
张家鑫,王博,牛飞,程耿东..分级型放射肋短壳结构集中力扩散优化设计[J].计算力学学报,2014,(2):141-148,240,9.基金项目
973（2014CB0490000）；国家自然科学基金（113720629，91216201）；辽宁省高等学校优秀人才支持计划（L J Q 2013005）；高等学校学科创新引智计划（CB14013）资助项目． （）
