ABAQUS显隠转换分析.docx
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ABAQUS显隠转换分析.docx
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ABAQUS显隠转换分析
.2.1TransferringresultsbetweenAbaqusanalyses:
overview
Products:
Abaqus/StandardAbaqus/ExplicitAbaqus/CAE
References
∙“TransferringresultsbetweenAbaqus/ExplicitandAbaqus/Standard,”Section9.2.2
∙“TransferringresultsfromoneAbaqus/Standardanalysistoanother,”Section9.2.3
∙“TransferringresultsfromoneAbaqus/Explicitanalysistoanother,”Section9.2.4
∙*IMPORT
∙*IMPORTELSET
∙*IMPORTNSET
∙*IMPORTCONTROLS
∙*INSTANCE
∙“TransferringresultsbetweenAbaqusanalyses,”Section16.6oftheAbaqus/CAEUser'sManual
Overview
AbaqusprovidesthecapabilitytoimportadeformedmeshanditsassociatedmaterialstatefromAbaqus/StandardintoAbaqus/Explicitandviceversa.Thiscapabilityisparticularlyusefulinmanufacturingproblems;forexample,theentiresheetmetalformingprocess(whichrequiresaninitialpreloading,forming,andsubsequentspringback)canbeanalyzed.InthiscasetheinitialpreloadingcanbesimulatedwithAbaqus/StandardusingastaticprocedureandthesubsequentformingprocesscanbesimulatedwithAbaqus/Explicit.Finally,thespringbackanalysiscanbeperformedwithAbaqus/Standard.
AbaqusalsoprovidesthecapabilitytotransferdesiredresultsandmodelinformationfromanAbaqus/StandardanalysistoanewAbaqus/StandardanalysisorfromanAbaqus/ExplicitanalysistoanewAbaqus/Explicitanalysis,whereadditionalmodeldefinitionsmaybespecifiedbeforetheanalysisiscontinued.Forexample,duringanassemblyprocessananalystmayfirstbeinterestedinthelocalbehaviorofaparticularcomponentbutlaterisconcernedwiththebehavioroftheassembledproduct.InthiscasethelocalbehaviorcanfirstbeanalyzedinanAbaqus/StandardorAbaqus/Explicitanalysis.Subsequently,themodelinformationandresultsfromthisanalysiscanbetransferredtoasecondAbaqus/StandardorAbaqus/Explicitanalysis,whereadditionalmodeldefinitionsfortheothercomponentscanbespecified,andthebehavioroftheentireproductcanthenbeanalyzed.
Forthiscapabilitytowork,thesamereleaseofAbaqus/ExplicitandAbaqus/Standardmustberunoncomputersthatarebinarycompatible.
ABAQUS可以从隐式计算结果到显示计算进行分析,,该问题在求解一些问题是非常有用的,例如薄钢的锻造过程(经历预加载,成形和回弹),该分析预加载可以通过std分析,锻造过程可以通过XPT进行分析,最后回弹可以再用std进行分析。
ABAQUS也提供了从隐式分析到隐式分析和从显示分析到显示分析,例如可以先对感兴趣的局部构件进行分析,分析完成后,在对整个结构作分析,前部的分析结果可以传到后面的整体分析中。
Savingtheanalysisresults
TherestartfilesfromtheoriginalanalysiscontaintheanalysisresultsthataretransferredfromAbaqus/StandardorAbaqus/Explicit.Obtainingrestartfilesisdescribedinmoredetailin“Writingrestartfiles”in“Restartingananalysis,”Section9.1.1;briefsummariesareprovidedbelow.Bydefault,Abaqus/StandarddoesnotwriteanyrestartinformationandAbaqus/Explicitwritesresultsatthebeginningandendofeachstep.
SavingresultsfromAbaqus/Standard
IftheresultsaretobeimportedfromanAbaqus/Standardanalysis,theresultsfromtheoriginalAbaqus/Standardjobmustbewrittentotherestart(.res),analysisdatabase(.mdland.stt),part(.prt),andoutputdatabase(.odb)files.Youcanspecifytheincrementsatwhichrestartinformationwillbewritten.RestartinformationisalwayswrittenattheendofastepinadditiontotherequestedincrementswheneveryourequestrestartdatainAbaqus/Standard.
InputFileUsage:
*RESTART,WRITE,FREQUENCY=n
保存分析结果
重启动文件包含了之前分析的信息,关于重启动的描述参阅“Writingrestartfiles”in“Restartingananalysis,”Section9.1.1;下面做简要介绍,默认情况下,std不保存重启动文件,xpt在每个分析部开始和结束步保存重启动文件。
Std结果保存
如果想从std分析后获得结果,原始的std分析必须保留重启文件(.res),分析数据(.mdland.stt),PART(.prt),和输出数据(.odb)文件,用户可以指定具体的重启位置,重启信息除了在请求的位置输出外在每一分析步的最后也将输出。
InputFileUsage:
*RESTART,WRITE,FREQUENCY=n
Abaqus/CAEUsage:
Stepmodule:
Output
RestartRequests:
enternintheFrequencycolumnforeachstep
Xpt结果保存
如果想要从某一时刻输入xpt分析的结果,则必须在原始的结果文件中保存.abq状态文件,状态文件重启文件数据文件,PART文件和结果文件共同用来从xpt分析后的结果作为输入。
可以具体指定是否精确的时间输出xpt重启文件,因为xpt会在每个分析步的最后给出重启文件。
InputFileUsage:
Usethefollowingoptiontorequestresultsattheincrementsendingimmediatelyaftereachtimeinterval:
*RESTART,WRITE,NUMBERINTERVAL=n,TIMEMARKS=NO
Usethefollowingoptiontorequestresultsattheexacttimeintervals:
*RESTART,WRITE,NUMBERINTERVAL=n,TIMEMARKS=YES
Abaqus/CAEUsage:
Stepmodule:
Output
RestartRequests:
enternintheNumberIntervalcolumn;clicktochecktheTimeMarkscolumnforeachstepifyouwanttheresultswrittenattheexacttimeintervals
SavingresultsfromAbaqus/Explicit
IftheresultsaretobeimportedfromanAbaqus/Explicitanalysis,theresultsfromtheoriginalAbaqus/Explicitjobmustbewrittentothestate(.abq)fileatthetimewhentransferofthestateofthedeformedbodyisrequired.Thestate(.abq),restart(.res),analysisdatabase(.stt),package(.pac),part(.prt),andoutputdatabase(.odb)fileswillbeusedforimportingtheresultsfromAbaqus/Explicit.
Youcanspecifywhethertheresultsaretobewrittenattheexacttimedictatedbythespecifiedtimeinterval,n,duringastepofanAbaqus/Explicitanalysisorattheincrementendingafterthetimedictatedbythespecifiedtimeinterval.Resultsarealwayswrittenattheendofastep,soitisnotnecessarytorequestresultsattheexacttimeintervalsifresultswillbereadonlyfromtheendofastep.
InputFileUsage:
Usethefollowingoptiontorequestresultsattheincrementsendingimmediatelyaftereachtimeinterval:
*RESTART,WRITE,NUMBERINTERVAL=n,TIMEMARKS=NO
Usethefollowingoptiontorequestresultsattheexacttimeintervals:
*RESTART,WRITE,NUMBERINTERVAL=n,TIMEMARKS=YES
Abaqus/CAEUsage:
Stepmodule:
Output
RestartRequests:
enternintheNumberIntervalcolumn;clicktochecktheTimeMarkscolumnforeachstepifyouwanttheresultswrittenattheexacttimeintervals
指定模型数据的传递和结果
下面讲解如何指定具体的输入请求,从一个模型数据和结果输入到另一个模型数据和结果,用户可以输入从没有被定义成装配件的实例的elementset,或者可以输入part实例从已经定义成装配件实例的part实例。
在CAE里面仅仅能从装配件的构件实例中输入模型。
指定从elementset中输入数据和结果。
输入的例子参见“Springbackoftwo-dimensionaldrawbending,”Section1.5.1oftheAbaqusExampleProblemsManual,and“Axisymmetricformingofacircularcup,”Section1.3.7oftheAbaqusExampleProblemsManual。
InputFileUsage:
Usethefollowingoptiontoimportelementsetsfromapreviousanalysis:
*IMPORT
listofelementsetsthataretobeimported
为了阻止模棱两可的单元和节点,*import必须在定义额外模型数据前指定,另外*import只能指定一次
每个elementset的名字在*import输入行必须在原始文件的截面定义中使用过,(e.g.*solidsection),elementset仅能包含不超过三种类型的单元。
在CAE里面只能从PARTINSTANCES里面输入结果和数据
如果输入的超过一个partinstance,partinstance必须从一个结果文件里输入且输入的参数必须和输入文件partinstances里面的一致,每个instance的名字应该保持一致,只有importinstance里面的sets才能被输入,sets在assemblies定义的必须在import分析中重新定义,重新定义的sets不能修改输入的新截面,材料的方向,法线,和梁方向
InputFileUsage:
Usethefollowingoptionstoimportapartinstancefromapreviousanalysis:
*INSTANCE,INSTANCE=instance-name
Additionalsetandsurfacedefinitions(optional)
*IMPORT
*ENDINSTANCE
Abaqus/CAEUsage:
InAbaqus/CAEyoucanimportmodeldataandresultsonlyfrommodelsthataredefinedasassembliesofpartinstances.
Loadmodule:
CreatePredefinedField:
Step:
Initial:
chooseOtherfortheCategoryandInitialStatefortheTypesforSelectedStep:
selecttheinstancestowhichtheinitialstateshouldbeassigned
Specifyingthetransferofmodeldataandresults
Theimportcapabilityisusedtotransfermodeldataandresultsfromoneanalysistoanother.Thefollowingsectionsdescribehowtospecifytheimportrequest.Youcanimportelementsetsfrommodelsthatarenotdefinedasassembliesofpartinstances,oryoucanimportpartinstancesfrommodelsthataredefinedasassembliesofpartinstances.InAbaqus/CAEyoucanimportmodeldataandresultsonlyfrommodelsthataredefinedasassembliesofpartinstances.
Specifyingthetransferofmodeldataandresultsformodelsthatarenotdefinedasassembliesofpartinstances
Youcanimportelementsetsfromapreviousanalysistospecifythetransferofmodeldataandresultsformodelsthatarenotdefinedasassembliesofpartinstances.Thisimportcapabilityisillustratedin“Springbackoftwo-dimensionaldrawbending,”Section1.5.1oftheAbaqusExampleProblemsManual,and“Axisymmetricformingofacircularcup,”Section1.3.7oftheAbaqusExampleProblemsManual.
InputFileUsage:
Usethefollowingoptiontoimportelementsetsfromapreviousanalysis:
*IMPORT
listofelementsetsthataretobeimported
Topreventanyambiguityregardingelementandnodedefinitions,the*IMPORToptionmustbespecifiedbeforeanyoptionsthatdefineadditionalmodeldataintheinputfile.Inaddition,the*IMPORToptioncanbespecifiedonlyonce.
Eachelementsetnamespecifiedonthedatalineofthe*IMPORToptionmusthavebeenusedinasectiondefinitionoption(e.g.,*SOLIDSECTION)intheoriginalanalysis.Anelementsetcancontainnomorethanthreedifferenttypesofelements.
Abaqus/CAEUsage:
InAbaqus/CAEyoucanimportmodeldataandresultsonlyfrommodelsthataredefinedasassembliesofpartinstances.
Specifyingthetransferofmodeldataandresultsformodelsthataredefinedasassembliesofpartinstances
Youcanimportpartinstancesfromapreviousanalysistospecifythetransferofmodeldataandresultsformodelsthataredefinedasassembliesofpartinstances.Ifyouimportmorethanonepartinstance,thepartinstancesmustbefromthesameoutputdatabase(.odb)fileandallimportparametersmustbethesameforeachimportedpartinstance.Eachinstancenamethatyouspecifymustbethesameastheinstancenameintheoriginalanalysis.Onlysetsthataredefinedwithintheimportedinstancewillbeimported.Setsdefinedattheassemblylevelmustberedefinedintheimportanalysis.Newsetdefinitio
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