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1、Workshop7 NonlinearAnalysis-LargeDeflectionArchedBeam7.NonlinearAnalysis-LargeDeflectionArchedBeamDescriptionAshallowarchissubjectedtoa20,000Nforceatitsmidspan.Determinethemidspandisplacementusingbothalinearandnonlinear(large-deflection)analysis,thencomparetheresults
2、.00129012Dec1999W7-27.NonlinearAnalysis-LargeDeflectionArchedBeamLoadsandMaterialProperties00129012Dec1999W7-37.NonlinearAnalysis-LargeDeflectionArchedBeam1.EnterANSYSintheworkingdirectoryspecifiedbyyourinstructorusing“beamarch”asthejobname.2.Werecommendbuildingthemod
3、elusingsteps3-12,butifyoudon'twantto,youmayresumeanexistingdatabase(beamarch.db1),thenskiptostep13.UtilityMenu>File>Resumefrom…Orissue:RESUME,beamarch,db13.Define4keypointsintheglobalcylindricalsystem:kp1at(1270,75),kp2at(1270,90),kp3at(1270,105),kp4at(1270sin45,90).K
4、p4istheorientationkeypoint.UtilityMenu>WorkPlane>ChangeActiveCSto>GlobalCylindricalMainMenu>Preprocessor>-Modeling-Create>Keypoints>InActiveCS…UtilityMenu>Parameters>AngularUnits...Orissue:/PREP7CSYS,1K,1,1270,75K,2,1270,90K,3,1270,105*AFUN,DEGK,4,(1270*SIN(45)),90001
5、29012Dec1999W7-47.NonlinearAnalysis-LargeDeflectionArchedBeam4.Definelines(arcs)fromkeypoints1to2andkeypoints2to3:MainMenu>Preprocessor>-Modeling-Create>-Lines-Lines>InActiveCoord+Orissue:L,1,2L,2,35.DefinetheelementtypetobeBEAM189,andthendefinematerialproperties(EX=2
6、10e3MPa):MainMenu>Preprocessor>ElementType>Add/Edit/Delete…MainMenu>Preprocessor>MaterialProps>-Constant-Isotropic...Orissue:ET,1,BEAM189MP,EX,1,210E36.ConstraintheUX,UY,andUZdirectionsatkeypoints1and3,andthenconstrainonlytheUZdirectionatkeypoint2:MainMenu>Preprocesso
7、r>Loads>-Loads-Apply>-Structural-Displacement>Onkeypoints+Orissue:DK,1,UX,0,,,UY,UZDK,3,UX,0,,,UY,UZDK,2,UZ,000129012Dec1999W7-57.NonlinearAnalysis-LargeDeflectionArchedBeam7.Applyaforceof20,000NinthenegativeYdirectionatkeypoint2:MainMenu>Preprocessor>Loads>-Loads-App
8、ly>-Structural-Force/Moment>Onkeypoints+Orissue:FK,2,FY,-2000000129012Dec1999W7-67.NonlinearAnalysis-LargeDeflectionArchedBe
