Tutorial for WorkBench几何建模.docx
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TutorialforWorkBench几何建模
StartANSYSWorkbench.
ChooseNEWPROJECT
Thenselecttheunits
Click“OK”
Next,picktheYZplane
AlignitinthexpointingoutdirectionbyclickingontheX
ChooseSketchandthenopenthesettings
ByclickingfirstonSketchingandthen,whenmenuopensabove,clickingonsettings.
Choose16minorsteppermajorandthenopenthegridandchecktheboxesfor2Dand
Snap
Nowthatthesearechecked,expandthegridbyrightclickingheretoexposethe+markanddragaboxaroundtheregiontobezoomed.Whenyourelease…theminordivisionsarevisibleinthebox
\
Choosepolyline
Movecursortoartworkareaandobserveitbecomesapencil.Drawtheobject(actuallyyouaremakingatwoDsketch)andwhenyoufinish,rightclickandselectclosedend.
Nowthepicturechangesfromadarksetoflinestothislighteroutline.ClickontheballtoplaceyourselfinISOviewandontheModelingbuttontoclosethesketchingmenuandreturntothetreediagram.
Yourwindowshouldnowlooklikethis.
HittheExtrudebutton
Theobjectextrudes
Thelengthis12inches.Youcanchangethisbytypinginanewvalueandthelengthupdates.Whenyouarehappywiththeextrusion,hitgeneratetocreatea3Dsolid.
Herewehavechangedto10inchesandGenerated.Notethecoloroftheobject.Wecanstillchangethedimensionsandthenhitgenerateanditwillrecreatetheobjectinthenewlength.
Notehowitsayswehaveonebodyandonepart.
Ifwewanttocreateanotherpartwithoutinteractingwiththisone,wecan“Freeze”thispartbyselectingTools/Freeze
Notehowthefrozenpartissemitransparentandtheadditionofafreezeoperationisinsertedinthetreediagramwhichshowswehaveonepartmadeofonebody.
Wecannowmakeothersketchesandextrudeandgeneratetocreateallthepieces.Oncewehaveanobjectwelike,wecanmirroritormoveitbygeneratingadditionalplanes.
Ihavefoundthatthestatedshiftdirectionsfortheplanegenrationsareincorrect.ThatistellingtheshifttobeintheXdirectionwhenintheYZplanedoesnotnecessarilyproducetheXshift.Theeffectyougetdependsontheplaneyouareinwhenyoudefineanewplane.Thisseemstorepresentaprogrammingerrorthatwasnotfoundyet.Ignoringthis,andusingthe“empiricallyfound”methodofgeneratingplanesletsyoucreateseveralobjectssuchassupports.
PicktheXZplaneandthenhitthenewplaneICON
Notehowthecolorsoftheaxisthatshowupforthenewaxisdonotmatchtheorientationofthecoordinatesystem.Usethecolortodeterminewhichshift.Hitthetransformandwhenthepulldownoccurs,choose“BLUE”whichcorrespondstoOFFSETZ.Enter–4tocausetheplanetoshiftdownby4inchesasshowninthesketch.
Hitgeneratetocreatethenewplane4whichisparalleltotheXZplanebut4inchesdown.
Gotothesketchingmode,setthegridtobe2DandSnapandset16asthedivisionsasbefore….Drawthecrosssectionofthepiecesthatwillmakeupthelegs.
Alignwith“Y”normalbyclickingthe“Y”intheTriad…itwilllookliketheabove.
Nowrightclickanddragaboxtoexpandtheview
Nowmakethetwosketches.Besuretostay1/16awayfromedgessothesystemdoesnotbondtogetherlaterwhenthedrawingisimportedtothesimulation.Ihavefoundthatintimateproximitybondsthepartseveniftheyare“frozen”.
Drawonefirstandchooseclosedendbyrightclickingatthisstage.
Nowgotoisoviewbyclickingballandthenextruding5.5inchesthengenerating.
Notethatbothformed.Nowhitgenrate.
Nowthereare3partsandthreebodies.
ReadthehelpunderMirroroperationsandcreatetheYZplaneatthecenterofthebridge.Selectthetwoverticalcolumnsandmirrorthemintoexistance.Thiscompletesthegeometry.
Thisshowstheplanethatwascreatedbymoving…notyetgeneratedthatisthenextstep.
Nowgotothecreatemenuandchoosebodyoperation
ThedefaultoperationisMIRROR.Choosethetwobodiesbyclickingonthem.Holdthecontroldowntoclickthesecondone.NotethecursorlookslikeafilledbrickindicatingitisintheBODYselectionmode.Whentheyarebothselected.Hit“APPLY”
Itrespondsbychangingthecolorandshowing2bodiesareselected.
Nowselecttheplaneyoujustcreated,Plane5.Clickonthe“notselected”anditwillchangeto“applycancel”.
ThenclickonthePlane5iconinthetreemenuabove.Whenithighlights,gobackandhitapply.Thescreenwillthenlooklikethis.
Now,allthatremainsisto“generate”.Doitnow.
Nowwehave5partsand5bodies.
Nextstepistospotweld.Thisiswillsimulateourrivets.Thisisdonebyenteringspotweldpoints.Clickheretostarttheprocess.Therearethreetypesofpoints.Pointsforspotwelds,pointsforloading,andconstructionpoints.YoucanapplyBCandLoadstothe“pointsforloading”.Thespotweldpointswillautomaticallytrytoweldtonearbysurfaces.Itcreateswhatisknownasacontact/targetpairofnodes.Thesewillshowupinthetreediagramlater.Letsputinaspotweld.Itmaybehelpfultoturnoffsomeofthepiecesby“hidingthem”.Butwewillnotneedto
PickaBASEFACEbyclickingit.Choosethecorrectonefromtheoptions.Whenitishighlightedinthepicture,hitAPPLY
Nextclickonthe“0”totherightofguideedges.
ItturnstoAPPLY-CANCEL.Nowclickontheguideedge.Readthehelponspotweldstobetterunderstandthisandthehelponplacingpoints
Noticehowthecursorhasshiftedtoedgemode…theboxwiththeedgedarkened.Onceitisselected(thisedgewheretheblackarrowis)…hitAPPLY.
Seehowitishighlighted…Thenhittheapply
Nowenterthedata0.5,0.25,0.1,and2forsigma,edge,omega,andN.Thiswillcreatetwowelds,0.5inches0.25inchesfromtheguideedgeand0.5fromthefirstsideand0.1inchesfromthesecondside.
Nowhitgeneratetocreatethewelds.
Itlookslikenothinghappenedbutrolltheslidertoseethebottomwhichshowstwopointsgenerated.Furtherdownitshowsmoreinfo.
Nowitshowsthematesgeneratedtoo….
ClickonthePOINT1tolightthemup.Spotweldsareshownasthreecircles.rightclickandenlargetoseethem.
Inthesimulationthesepointswillbejoinedbyweldmaterialsimulatedbybeamelements.Nowcreatetheweldsattheother3places.Whenthisisdone,clickonprojectandchoose“newsimulation”toportthegeometrytothesimulationengine.Nowitisjustamatterofaddingtheloads.
Ifyouwanttoloadinthecenter,youwillneedtoaddsomeloadingpoints,usingthesamemethodasforspotweldsbutinstead,clickthewordspotweldandchangeittoPOINTLOAD.Placeabout5or10pointloadpointsonthetopcentertorepresenttheloadingbar.
Yourarenowreadytosimulateanyofyourdesigns.Happymodeling.
Dr.Q.