Sub Modeling
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Transcript of Sub Modeling
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7/28/2019 Sub Modeling
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ANSYSTutorial:SubmodelinginANSYSV14.5SubmodelingisaspecialfeatureinANSYS14.5thatpreviouslywasrestrictedtoMechanicalAPDL.Theaimistoproducesatisfactoryresultsinaspecificregionwhereinaccurateresultshavebeenobtained.Forinstance,coarsemeshmaynotgivesufficientaccuratestressresults.Therefore,bycreatingasubmodelontheregionofinterest,newresultsmaybeachieved.Inprincipal,thedisplacementscalculatedonthecutboundariesofthecoarsemodelaremappedontothesubmodel.Notonlyaremoreaccurateresultsthebenefitofthisapplication,butalsothepossibilityofexperimentingwithdifferentdesignsfortheregionofinterest.Inaddition,ithelpsyouindemonstratingthedependencyofmeshrefinement.Themechanicalapplicationallowssubmodelingforstructural(stress)andthermalanalyses.
Figure1Thefirstthingyoudoistorunyouranalysisasnormal.Makeacopyoftheoriginalgeometryandcreateasubmodel.Itisimportanttohaveinmindthattheglobalcoordinatesystemmustbeexactlythesameforboththecoarseandsubmodeltomakethetransferreddisplacementmatch.Afterrunningthesolutionofyourcoursemodel,youdraganddropthesolutionintothesetup.Now,submodelingwillappearunderStaticstructuralinyournewMechanicalsubmodelwindow,seefigure2.YourprojectpageshouldlooksimilartoFigure1.
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Figure2
Figure3:coursemodel Figure4:submodelYou can now insert the displacement from the coarse model into your submodel.
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Selectthecutboundariesfortransferring displacementsandrefinethemesh.Ifyoursubmodelcontainsanyexternalloads,theymustbeapplied.
Youarenowreadytoimporttheload.
Nowyoucansolveyoursubmodel
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Figure5:Stressplotsofthecoarseandsubmodel.
Figure6:Totaldeformationofthecoarseandsubmodel.Toverifytheresults:thedeformationofbothmodelsshouldbethesame.Also,comparethestressresultsalongthecutboundarieswiththoseonthecoursemodel.Theresultsshouldbeingoodagreement;otherwiseyoushouldmoveyourcutboundariesfurtherawayfromtheregionofinterest.
