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1、Howtoselecttangentelementfacesusingthequerybyfreefacenormaltool1￠ProblemDescription?Youhaveacomplexfiniteelementmeshwithnogeometry.Youneedtoselectelementfaces(ofeithershellorsolidelements),inordertoapplyasurfacepressure.Tomanuallypicktheelementfacesonebyone
2、couldtakeaverylongtimeandisverytedious.Thisisespeciallytrueifthesurfaceisnon-planarandcomplexistopology.Atoolexiststoselectadjacentelementfacesthathavetheirsurfacenormalorientedtooneanotherwithinatolerance.2Step1.SetSystemEnvironmentVariableabSetthesystemen
3、vironmentVariablea.EVAL_PRE_RELEASE_QUERY_FREEFACESb.TRUE3Step2.CreatePressureLoadcCreateanewPressureLoadda.TypeaNewSetNameb.ClickonSelectApplicationRegion…c.SettheGeometryFiltertoFEM.d.ClickAutoSelect…Note:IfyoudonotseeAutoaSelect,thentheenv.variableonpg3h
4、asnotbeenset.b4Step3.SecifyanAdjacentNormalToleranceandpickaref.facebaSpecifyanadjacentnormaltoleranceandpickareferenceface.a.Type2.0intheAdjacentbNormalswithinboxb.Pickanyfaceasareferencefacetostartwith.Itmayhelptoturnbonvisibleentitiesonly.5Step4.HavePatr
5、anfindadjacentfacesHavePatranfindadjacentfaces.a.ClickOverwritetohavePatranfindallfacesthatareadjacenttoonebaanotherwithin2.0degrees.b.Highlightedfacesshownarenotalltheadjacentfaces6Step5.HavePatranfindadjacentfaces(increasetolerance)aHavePatranfindadjacent
6、faceswithanincreasedtolerancetopickalladjacentfaces.a.Type10.0intheAdjacentNormalsbwithinbox.cb.ClickOverwritetohavedPatranfindallfacesthatareadjacenttooneanotherwithin10.0degrees.c.Noticeallelementfacesoncomplexfacearehighlighted.Facesonsidesarenotselected
7、becausetheirnormalsare>10.0degreesfromanyoftheadjacentfaces.d.PickCancel7Step6.CompleteApplicationRegionCompleteApplicationRegiona.ClickAddb.ApplicationRegionisnowcomplete.aFinishtheboundaryconditionbasusual.8Step7.SelectassociatedNodes(optional)abcdSometim
8、esthelistofnodesonthesefacesisdesired.a.ClickToolsb.PickListec.PickCreated.PickFEM,Node,gAssociation.e.PickElementFacef.Copyelementfacelistfromstepbonpriorslidebyhighlightingthelistandtypingctrl-cg.Pas
