大型民用飞机非线性弹性载荷设计方法研究

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中图分类号：V211.47 文献标志码：B 文章编号：1671-5276（2025）03-0176-04

Research on Nonlinear Elastic Load Design of Large Civil Aircraft

LIUXiaochen，TANLinlin （Shanghai Aircraft Designand Research Institute，Shanghai 2O1210，China）

Abstract：Basedontheactual engineringrequirements inloaddesign，anonlinearstaticaeroelastic trimminganalysisandload calculation methodforcivillargeaireraftisdeveloed.Acivilaircraftistakenasanexampletoanalyzethenonlinearstatic aeroelasticloadoflargedeformationstate，andthenonlineartrimanalysisandloaddesignresultsunderdiferentmanbeam stiffnessarestudiedandcompared.Researchshowsthatthereisasignificantdiferenceintheresultsoflinearandnolineartrim analysisunderlargedeformationconditions，resulting invaryingdegreesofatackangles，structuraldeformation，andload distributionacrosstheentireaireraft，which indicatesthatlinear methodscannotaccuratelyguideloaddesignaftersignificant structuraldeformationoccurs.Thecomparisonofthestiffnesscalculationresultsofdiferentmainbeamsontheshowsthatthe elasticloadcalculationresultsaredirectlyrelated tothestifnessofthewingmainbeam.Thesmalerthestifessofthemain beam，the greater the difference betweenlinear and nonlinear trimresults.

Keywords：civil aircraft；nonlinear；aeroelastic； load design

0 引言

进人21世纪以来，超大容量运输机开始研制，其中当前比较著名的机型有A380、B787和An-225 。（剩余4560字）