復合材料翼面結(jié)構(gòu)二級布局優(yōu)化設計方法.pdf

1、南京航空航天大學碩士學位論文復合材料翼面結(jié)構(gòu)二級布局優(yōu)化設計方法姓名：吳莉莉申請學位級別：碩士專業(yè)：飛行器設計指導教師：姚衛(wèi)星201101復合材料翼面結(jié)構(gòu)二級布局優(yōu)化設計方法IIAbstractWeightisanimptantperfmanceindexfaerospacestructure.Weightreductioncannotonlyimprovethemobilityendurancecapabilityofaircraft

2、butalsosavefuel.Asasignificantcomponentofairplanestructurewingstructureconfigurationtypesvary.Amongthemstiffenedplatestructurehasbeenwidelyuseditslayoutoptimizationdesignisconcernedincreasinglyinaviationrealm.Layoutoptim

3、izationisadifficultyofdesign.Fcompositewingconfigurationtherearemanydesignvariablesincludingthetypethenumberofreinfcedbarsbeamsribsthicknessstackingsequenceetcvaryingfromcontinuoustodiscretespecie.Togetherwiththevariousc

4、onstraintsallofthesemakelayoutoptimizationproblemdifficult.Inthispaperalayoutoptimumdesignfmationfwingconfigurationisproposed.Thisfmationcomposedofthreesteps.Firstlyparametricfiniteelementmodelwassetupapproximatemodelisu

5、sedtoconstructtheweightfunctionoflayoutvariablessizevariablesthentooptimizetheweightfunctiontoobtainthelayoutsizeofthestiffenedpanelundergivenstackingsequence.SecondlytheequivalentbendingstiffnessGAwereemployedtodealwith

6、theplystackingsequenceoptimizationwheretherequirementsofmanufactureetc.wereconsidered.finallythebucklingconstrainresultsgivenbythelayoutoptimizationstackingsequenceoptimizationwerecollabativelyoptimizedthustheoptimalcomp

7、ositestiffenedpanelwasdetermined.Thelayoutoptimizationdesignofthecompositestiffenedplatethehizontalstabilizerofcertainairplanearestudiedinthispaperusingtheabovemethod.Themethodproposedinthispaperisprovedtobeefficientprac