强度与环境
彊度與環境
강도여배경
STRUCTURE & ENVIRONMENT ENGINEERING
2015年
4期
35-39
,共5页
李宇峰%晏明生%安宁%孙文杰%周进雄
李宇峰%晏明生%安寧%孫文傑%週進雄
리우봉%안명생%안저%손문걸%주진웅
MSC.Nastran%HyperWorks%结构优化%结构分析%薄壁加筋结构
MSC.Nastran%HyperWorks%結構優化%結構分析%薄壁加觔結構
MSC.Nastran%HyperWorks%결구우화%결구분석%박벽가근결구
MSC.Nastran%hyperworks%structure analysis%structure optimization%thin-walled stiffened structures
薄壁加筋结构是航空航天领域常见的一种结构型式,这类结构的强度分析和优化设计广泛地受到关注。相比自行开发软件,合理地结合商业有限元软件的优势开展结构分析和优化设计更加简单实用,且易于飞机结构设计人员掌握。提出了一个基于MSC.Nastran和HyperWorks的完整的结构分析和优化设计流程。首先,在MSC.Nastran中进行整体结构的建模和分析,然后将隔框从整体结构中隔离出来,将MSC.Nastran分析得到的隔框边界节点的位移信息作为强制位移载荷施加给隔框,然后基于HyperWorks的优化模块对隔离出的隔框单独做优化分析和拓扑结构设计。该流程合理地结合了MSC.Nastran的结构分析功能和HyperWorks的优化功能,以薄壁圆筒隔框结构中隔框部分的拓扑优化为例详细说明了流程的全部细节,通过算例表明该结构分析和优化设计流程普遍适用于大型复杂结构的优化设计问题。
薄壁加觔結構是航空航天領域常見的一種結構型式,這類結構的彊度分析和優化設計廣汎地受到關註。相比自行開髮軟件,閤理地結閤商業有限元軟件的優勢開展結構分析和優化設計更加簡單實用,且易于飛機結構設計人員掌握。提齣瞭一箇基于MSC.Nastran和HyperWorks的完整的結構分析和優化設計流程。首先,在MSC.Nastran中進行整體結構的建模和分析,然後將隔框從整體結構中隔離齣來,將MSC.Nastran分析得到的隔框邊界節點的位移信息作為彊製位移載荷施加給隔框,然後基于HyperWorks的優化模塊對隔離齣的隔框單獨做優化分析和拓撲結構設計。該流程閤理地結閤瞭MSC.Nastran的結構分析功能和HyperWorks的優化功能,以薄壁圓筒隔框結構中隔框部分的拓撲優化為例詳細說明瞭流程的全部細節,通過算例錶明該結構分析和優化設計流程普遍適用于大型複雜結構的優化設計問題。
박벽가근결구시항공항천영역상견적일충결구형식,저류결구적강도분석화우화설계엄범지수도관주。상비자행개발연건,합리지결합상업유한원연건적우세개전결구분석화우화설계경가간단실용,차역우비궤결구설계인원장악。제출료일개기우MSC.Nastran화HyperWorks적완정적결구분석화우화설계류정。수선,재MSC.Nastran중진행정체결구적건모화분석,연후장격광종정체결구중격리출래,장MSC.Nastran분석득도적격광변계절점적위이신식작위강제위이재하시가급격광,연후기우HyperWorks적우화모괴대격리출적격광단독주우화분석화탁복결구설계。해류정합리지결합료MSC.Nastran적결구분석공능화HyperWorks적우화공능,이박벽원통격광결구중격광부분적탁복우화위례상세설명료류정적전부세절,통과산례표명해결구분석화우화설계류정보편괄용우대형복잡결구적우화설계문제。
Thin-walled stiffened structures are ubiquitous in aerospace vehicles. The analysis and optimization of these structures is a recurrent theme in structural engineering. Performing this task through combination of commercial softwares rather than home-made codes will broaden the applicability and capability of computer-aided engineering for real purpose designs. We present an integrated strategy to carry out structural analysis and optimization by combining MSC. Nastran and Hyperworks. The overall structure was modeled and analyzed in MSC. NASTRAN. The stiffened ribs were isolated from the overall structure and performed a refined topology optimization in Hyperworks by enforcing displacement boundary conditions extracted from NASTRAN analysis. The powerfullness of structral analysis of NASTRAN and structural optimization of Hyperworks is thus merged to give this integrated approach. A long stiffened cylinder with longitudinal ribs were chosen as an example to detail the procedure, but the approach is versatile and can be developed for more complicated aerospace structures.