机械科学与技术2018，Vol.37Issue(5)：816-820,5.DOI:10.13433/j.cnki.1003-8728.20180021
大型航空结构有限元数值模拟方法研究
Study on Finite Element Modeling for Large Aircraft Structures
摘要
Abstract
The method of natural mesh and refined model for structural analysis is considered based on experimental data.Natural mesh method is employed to build a wing-body FEM model,which results in a relative error 7.46％ of wing-tip displacement.The relative error between analysis and test results which are within 10％ takes up about 80％ of whole points on upper panel of outer wing;whereas,it takes up about 70％ on upper panel of central wing.Shell elements are mainly used to establish a refined model for a full-scale aircraft,which obtains the relative error 1.87％ of wing-tip displacement.The relative error between analysis and test results which are with 10％ takes up over 80％ on upper panels of central and outer wing.The results show that the refined model can accurately simulate the stiffness,load distribution and global stress/strain response.Therefore,the refined model could also be used to predict zones of interest for more detailed analysis,and provide the failure boundarys.关键词
飞机结构/自然网格/细化网格/结构分析/一致性评估Key words
aircraft/natural mesh/refined model/structural analysis/correlation analysis分类
航空航天引用本文复制引用
万春华,段世慧,聂小华,吴存利,张维..大型航空结构有限元数值模拟方法研究[J].机械科学与技术,2018,37(5):816-820,5.基金项目
民用飞机专项科研项目(MJ-2015-F-027)资助 （MJ-2015-F-027）
