Building a Model in AnsysWord下载.docx

Building a Model in AnsysWord下载.docx

《Building a Model in AnsysWord下载.docx》由会员分享，可在线阅读，更多相关《Building a Model in AnsysWord下载.docx（28页珍藏版）》请在冰点文库上搜索。

Command（s）:

/FILNAME

GUI:

UtilityMenu>

File>

ChangeJobname

The/FILNAMEcommandisvalidonlyattheBeginlevel.ItletsyouchangethejobnameevenifyouspecifiedaninitialjobnameatANSYSentry.Thejobnameappliesonlytofilesyouopenafterusing/FILNAMEandnottofilesthatwerealreadyopen.Ifyouwanttostartnewfiles（suchasthelogfile,Jobname.LOG,anderrorfileJobname.ERR）whenyouissue/FILNAME,settheKeyargumenton/FILNAMEto1.Otherwise,thosefilesthatwerealreadyopenwillstillhavetheinitialjobname.

DefininganAnalysisTitle

The/TITLEcommand（UtilityMenu>

ChangeTitle）,definesatitlefortheanalysis.ANSYSincludesthetitleonallgraphicsdisplaysandonthesolutionoutput.Youcanissuethe/STITLEcommandtoaddsubtitles;

thesewillappearintheoutput,butnotingraphicsdisplays.

DefiningUnits

TheANSYSprogramdoesnotassumeasystemofunitsforyouranalysis.Exceptinmagneticfieldanalyses,youcanuseanysystemofunitssolongasyoumakesurethatyouusethatsystemforallthedatayouenter.（Unitsmustbeconsistentforallinputdata.）

Formicro-electromechanicalsystems（MEMS）,wheredimensionsareontheorderofmicrons,seetheconversionfactorsinSystemofUnitsintheANSYSCoupled-FieldAnalysisGuide.

Usingthe/UNITScommand,youcansetamarkerintheANSYSdatabaseindicatingthesystemofunitsthatyouareusing.Thiscommanddoesnotconvertdatafromonesystemofunitstoanother;

itsimplyservesasarecordforsubsequentreviewsoftheanalysis.

DefiningElementTypes

TheANSYSelementlibrarycontainsmorethan150differentelementtypes.Eachelementtypehasauniquenumberandaprefixthatidentifiestheelementcategory:

BEAM4,PLANE77,SOLID96,etc.Thefollowingelementcategoriesareavailable:

BEAM

CIRCUit

COMBINation

CONTACt

FLUID

HF（HighFrequency）

HYPERelastic

INFINite

INTERface

LINK

MASS

MATRIX

MESH

PIPE

PLANE

PRETS（Pretension）

SHELL

SOLID

SOURCe

SURFace

TARGEt

TRANSducer

USER

VISCOelastic（orviscoplastic）

Theelementtypedetermines,amongotherthings:

∙Thedegree-of-freedomset（whichinturnimpliesthediscipline--structural,thermal,magnetic,electric,quadrilateral,brick,etc.）

∙Whethertheelementliesintwo-dimensionalorthree-dimensionalspace.

BEAM4,forexample,hassixstructuraldegreesoffreedom（UX,UY,UZ,ROTX,ROTY,ROTZ）,isalineelement,andcanbemodeledin3-Dspace.PLANE77hasathermaldegreeoffreedom（TEMP）,isaneight-nodequadrilateralelement,andcanbemodeledonlyin2-Dspace.

YoumustbeinPREP7,thegeneralpreprocessor,todefineelementtypes.Todoso,youusetheETfamilyofcommands（ET,ETCHG,etc.）ortheirGUIpathequivalents;

seetheANSYSCommandsReferencefordetails.Youdefinetheelementtypebynameandgivetheelementatypereferencenumber.Forexample,thecommandsshownbelowdefinetwoelementtypes,BEAM4andSHELL63,andassignthemtypereferencenumbers1and2respectively.

ET,1,BEAM4

ET,2,SHELL63

Thistableoftypereferencenumberversuselementnameiscalledtheelementtypetable.Whiledefiningtheactualelements,youpointtotheappropriatetypereferencenumberusingtheTYPEcommand（MainMenu>

Preprocessor>

Create>

Elements>

ElemAttributes）.

Manyelementtypeshaveadditionaloptions,knownasKEYOPTs,andarereferredtoasKEYOPT

（1）,KEYOPT

（2）,etc.Forexample,KEYOPT（9）forBEAM4allowsyoutochooseresultstobecalculatedatintermediatelocationsoneachelement,andKEYOPT（3）forSHELL63allowsyoutosuppressextradisplacementshapes.YoucanspecifyKEYOPTsusingtheETcommandortheKEYOPTcommand（MainMenu>

ElementType>

Add/Edit/Delete）.

DefiningElementRealConstants

Elementrealconstantsarepropertiesthatdependontheelementtype,suchascross-sectionalpropertiesofabeamelement.Forexample,realconstantsforBEAM3,the2-Dbeamelement,arearea（AREA）,momentofinertia（IZZ）,height（HEIGHT）,sheardeflectionconstant（SHEARZ）,initialstrain（ISTRN）,andaddedmassperunitlength（ADDMAS）.Notallelementtypesrequirerealconstants,anddifferentelementsofthesametypemayhavedifferentrealconstantvalues.

YoucanspecifyrealconstantsusingtheRfamilyofcommands（R,RMODIF,etc.）ortheirequivalentmenupaths;

seetheANSYSCommandsReferenceforfurtherinformation.Aswithelementtypes,eachsetofrealconstantshasareferencenumber,andthetableofreferencenumberversusrealconstantsetiscalledtherealconstanttable.Whiledefiningtheelements,youpointtotheappropriaterealconstantreferencenumberusingtheREALcommand（MainMenu>

Whiledefiningrealconstants,keeptheserulesandguidelinesinmind:

∙WhenusingoneoftheRcommands,youmustenterrealconstantsintheordershowninTable4.n.1foreachelementtypeintheANSYSElementsReference.

∙Formodelsusingmultipleelementtypes,useaseparaterealconstantset（thatis,adifferentREALreferencenumber）foreachelementtype.TheANSYSprogramissuesawarningmessageifmultipleelementtypesreferencethesamerealconstantset.However,asingleelementtypemayreferenceseveralrealconstantsets.

∙Toverifyyourrealconstantinput,usetheRLISTandELISTcommands,withRKEY=1（shownbelow）.RLISTlistsrealconstantvaluesforallsets.ThecommandELIST,,,,,1producesaneasier-to-readlistthatshows,foreachelement,therealconstantlabelsandtheirvalues.

ELIST

List>

Attributes+RealConst

AttributesOnly

Nodes+Attributes

Nodes+Attributes+RealConst

RLIST

Properties>

AllRealConstants

SpecifiedRealConst

∙Forlineandareaelementsthatrequiregeometrydata（cross-sectionalarea,thickness,diameter,etc.）tobespecifiedasrealconstants,youcanverifytheinputgraphicallybyusingthefollowingcommandsintheordershown:

/ESHAPEandEPLOT

PlotCtrls>

Style>

SizeandShape

Plot>

Elements

ANSYSdisplaystheelementsassolidelements,usingarectangularcross-sectionforlinkandshellelementsandacircularcross-sectionforpipeelements.Thecross-sectionproportionsaredeterminedfromtherealconstantvalues.

CreatingCrossSections

IfyouarebuildingamodelusingBEAM44,BEAM188,orBEAM189,youcanusethesectioncommands（SECTYPE,SECDATA,etc.）ortheirGUIpathequivalentstodefineandusecrosssectionsinyourmodels.SeeBeamAnalysisandCrossSectionsintheANSYSStructuralAnalysisGuideforinformationonhowtousetheBeamTooltocreatecrosssections.

DefiningMaterialProperties

Mostelementtypesrequirematerialproperties.Dependingontheapplication,materialpropertiescanbelinear（seeLinearMaterialProperties）ornonlinear（seeNonlinearMaterialProperties）.

Aswithelementtypesandrealconstants,eachsetofmaterialpropertieshasamaterialreferencenumber.Thetableofmaterialreferencenumbersversusmaterialpropertysetsiscalledthematerialtable.Withinoneanalysis,youmayhavemultiplematerialpropertysets（tocorrespondwithmultiplematerialsusedinthemodel）.ANSYSidentifieseachsetwithauniquereferencenumber.

Whiledefiningtheelements,youpointtotheappropriatematerialreferencenumberusingtheMATcommand.

LinearMaterialProperties

Linearmaterialpropertiescanbeconstantortemperature-dependent,andisotropicororthotropic.Todefineconstantmaterialproperties（eitherisotropicororthotropic）,useoneofthefollowing:

MP

MainMenu>

Preprocessor>

MaterialProps>

MaterialModels

（SeeMaterialModelInterfacefordetailsontheGUI.）

Youalsomustspecifytheappropriatepropertylabel;

forexampleEX,EY,EZforYoung'

smodulus,KXX,KYY,KZZforthermalconductivity,andsoforth.ForisotropicmaterialyouneedtodefineonlytheX-directionproperty;

theotherdirectionsdefaulttotheX-directionvalue.Forexample:

MP,EX,1,2E11!

Young'

smodulusformaterialref.no.1is2E11

MP,DENS,1,7800!

Densityformaterialref.no.1is7800

MP,KXX,3,43!

Thermalconductivityformaterialref.no1is43

BesidesthedefaultsforY-andZ-directionproperties（whichdefaulttotheX-directionproperties）,othermaterialpropertydefaultsarebuiltintoreducetheamountofinput.Forexample,Poisson'

sratio（NUXY）defaultsto0.3,