Gravity-ThistutorialwillguideyoustepbystepintheProCASTset-upofasandcastingsimulation.Thegeometryusedforthistutorialiscomposedofa:·sand本指南將指導你在ProCAST中一步一步地建立一個砂型鑄件模擬。·鑄·砂·砂Loadthesand.meshmodelin1、在PreCAST中加載sand.mesh模Pleaseenterfirstthecasenameunderthe'Case'fieldofthefilemanagerandpressthePreCASTwillloadfirstaProCASTfile(d.dat)ifitispresentinthecurrentdirectory.IfPreCASTdoesnotfindanyProCASTfile,itwilllookforaMeshCASTfile(.mesh)withthecorrespondingprefix.AndifthereisnoMeshCASTfile,youwillhavetousetheOpenfile ofPreCASTinordertolookfortherightfile.首先在filemanager中的'Case'區(qū)域添入工程名稱，點擊PreCAST菜單PreCAST將首先加載一個PreCAST文件(d.dat)，如果這個文件在當前 如果PreCAST沒能找到一個PreCAST文件，它將搜索一個帶有相應前綴的MeshCAST文件(.mesh)。如果沒有MeshCAST文件，你將不得不用PreCAST菜單中的Open文件菜單來搜索正確的文件。CheckthePreCASTindicatesautomaticallythenumberofmaterials,thetotalnumberofnodesandofelements.TheunitsandtheglobalsizeofthemodelareshownTheseinformationandthevolumeofthedifferentcomponentsareavailableintheFile ->Checkgeometry2、檢查幾何模PreCAST自動顯示材料的數(shù)量，節(jié)點和零件的總數(shù)。模型的單位和輪廓尺寸這些信息和不同零件的體積在菜單 ->Checkgeometry選項中Assignmaterialpropertiestothecasting,moldandcores.Inthiscase,DuctileIronisassignedtothecastingmaterial,SandsilicatothemoldandSteel_H13tothecores.為硅砂，砂新材料為Steel_H13。CreateandAssigntheInterfacesbetweentheInthiscaseallinterfaceshavetobeconvertedfromEQUIVtoCOINC.Inordertovalidatethischoice,presstheApplybutton.4、創(chuàng)建和設(shè)置不同零件的界在本例中，所有的界面將EQUIV轉(zhuǎn)化成COINC。為了使該項選擇有效，點擊Apply按鈕。Oncetheinterfacesarecreated,assignaheattransfervaluetoeachinterface.Typicalvaluesare500W/m2Kbetweencastingandsandand1000W/m2Kbetweencastingandsteelcores.一旦界面被創(chuàng)建，對每個界面設(shè)置一個熱傳導數(shù)值。典型值鑄件與砂型界500W/m2K，鑄件與鋼制砂芯之間為1000W/m2KAssigntheBoundary5、設(shè)置邊界條AnaturalaircoolingheatBoundaryconditionwillbeappliedallaroundthesandbox,avelocityBoundaryconditionwillbeappliedandatemperatureBoundaryconditionwillbeimposedtosomenodesofthetopsurfaceofthedownSettheInordertosetthegravityvector,gointhe 6、設(shè)置重為了設(shè)置重力矢量，轉(zhuǎn)到Process菜單SettheconstantInitial7、設(shè)置初始條件常量SettherunInthePreferences ,selecttheGravityfillingoption.Therightanddedicatedrunparameterswillbeautomatically8、設(shè)置澆注參在Preferences菜單中選擇Gravityfilling選項合適 澆注參數(shù)將自動設(shè)置IntheGeneralrunparameterspanel,DTMAXissetto5secondsinthisGeneralrunparameters面板中，DTMAX在本例中被設(shè)置為5秒IntheThermalrunparameterspanel,TFREQissetto5在Thermalrunparameters面板中，TFREQ被設(shè)置為5IntheFlowrunparameterspanel,VFREQissetto5(equaltoFlow參數(shù)面板中，VFREQ被設(shè)置為5(等于TFREQ)DonotforgettopressApplyinordertovalidatetheRunParameters為了使參數(shù)選擇有效，了點擊ApplySaveandExit9、保存并退出10、運行AST10、運行ASTVisualizetheresultsin11、在ViewCAST示結(jié)Positionthemodelusingthepicturemanipulationtools(zoom,drag,rotate,用圖像處理工具(zoom,drag,rotate,定位模Selectthecasting選擇鑄件材料VisualizationVisualizationoftheflowbehaviorusingthe yer'yer'ysisysisofthevelocityvectors.PossiblemolderosioncanbeTemperatu