PAGE\*MERGEFORMATIVPAGE\*MERGEFORMATIII摘要复合材料构造的加筋壁板结构目前在航空结上得到了广泛的应用，与机身传统材料相比复合材料具有更加优越的综合性能，大型飞机的复合材料化已成为必然的趋势，高空飞行时，机身会受到增压载荷、发动机推力、剪流和弯矩载荷，其常见的失效形式为结构破坏，为了满足安全性能，需要进行强度校核，即强度分析。本文以有限元分析法对复合材料加筋壁板结构进行强度分析，所用软件为ANSYS,采用的模型为圆筒形加筋壁板。根据飞机飞行环境，对模拟的复合材料机身施加内外压差、轴向力、剪流和弯矩载荷，对模型进行强度分析，采用最大应力准则和TSAi-Wu强度理论作为理论依据，在进行强度分析时详细研究了在不同蒙皮厚度、不同铺层角度下的破坏载荷和破坏方式，并进行了相应的稳定性分析。分析结果表明：复合材料机身蒙皮厚度为3mm，铺层顺序45/0/-45/0/90/0时，机身的强度和稳定性好，研究结果有参考价值。关键词；复合材料加筋壁板，强度，有限元，ANSYS，稳定性AbstractComparedwithtraditionalmaterialsfuselagecompositeshavesuperioroverallperformance,compositematerialsreinforcedwallstructureconstructedintheaviationjunctionhasbeenwidelyused,largeaircraftcompositematerialshasbecomeaninevitabletrend,thestructureintheaxialforce,shearandbendingloads,acommonfailuremodeforstructuraldamage,inordertomeetsafetyperformance,theneedforstrengthcheck,thatstrengthanalysis.Inthispaper,finiteelementanalysisofstiffenedcompositepanelsfortheselectedstructuralstrengthanalysis,theuseofsoftwareANSYS,theselectedmodeliscylindricalreinforcedsiding.Inapplyingexternalpressure,axialforce,shearflowandmomentloads,throughfailureloadandfailuremodeanalysissuchasthestrengthofthemodel,usingthemaximumstresscriterionandTSAi-Wustrengththeoryasthetheoreticalbasisforconductingstrengthanalysisdetailedstudyoftheskinindifferentthicknessesanddifferentanglesplyfailureloadandfailuremode,andmakethecorrespondingstabilityanalysis.Theresultsshowedthat:skinthicknessandtheangleofthebodyplyimpactstrengthandstability,shouldbeareasonablechoice,butthemodelestablishedinthispaperandtherationalandefficientloadingofstiffenedcompositepanelsevaluateavaluablereference.Keywords;stiffenedcompositepanels,strength,finiteelement,ANSYS,stability目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc358107107"第一章绪论PAGEREF_Toc358107107\h1HYPERLINK\l"_Toc358107108"1.1引言PAGEREF_Toc358107108\h1HYPERLINK\l"_Toc358107109"1.2研究现状PAGEREF_Toc358107109\h2HYPERLINK\l"_Toc358107110"1.2.1国内外研究现状PAGEREF_Toc358107110\h2H