ABAQUS显隠转换分析报告

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1、.2.1 Transferring results between Abaqus analyses: overviewProducts:Abaqus/Standard Abaqus/Explicit Abaqus/CAEReferences?“TransferringresultsbetweenAbaqus/Explicitand Abaqus/Standard,”Section 9.2.2?“TransferringresultsfromoneAbaqus/Standardanalysistoanother,”Section 9.2.3?“Transferringresultsfromone

2、Abaqus/Explicitanalysistoanother,”Section 9.2.4? *IMPORT? *IMPORT ELSET? *IMPORT NSET? *IMPORT CONTROLS? *INSTANCE?“TransferringresultsbetweenAbaqusanalyses,”Section16.6oftheAbaqus/CAE Users ManualOverviewAbaqus providesthecapabilityto importa deformedmesh and itsassociatedmaterialstatefromAbaqus/St

3、andardintoAbaqus/Explicitand viceversa.Thiscapabilityisparticularlyusefulinmanufacturingproblems;forexample,theentiresheetmetalforming process (which requires an initial preloading, forming, and subsequentspringback) can be analyzed. In this case the initial preloading can be simulatedwith Abaqus/St

4、andard using a static procedure and the subsequent forming processcan be simulated with Abaqus/Explicit. Finally, the springback analysis can beperformed with Abaqus/Standard.Abaqusalso providesthecapabilityto transferdesiredresultsandmodelinformation from an Abaqus/Standard analysis to a new Abaqus

5、/Standard analysis orfroman Abaqus/Explicitanalysistoa new Abaqus/Explicitanalysis,where additionalmodel definitions may be specified before the analysis is continued. For example,duringan assemblyprocessan analystmay firstbe interestedinthe localbehaviorof a particularcomponent butlaterisconcernedw

6、iththebehavioroftheassembledproduct.Inthiscase the localbehaviorcan firstbe analyzedinan Abaqus/Standardor Abaqus/Explicit analysis. Subsequently, the model information and results fromthis analysis can be transferred to a second Abaqus/Standard or Abaqus/Explicitanalysis,whereadditionalmodeldefinit

7、ionsfortheothercomponents can bespecified, and the behavior of the entire product can then be analyzed.For this capability to work, the same release of Abaqus/Explicit and Abaqus/Standard must be run on computers that are binary compatible.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

8、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。Saving the analysis resultsThe restartfilesfromthe originalanalysiscontain the analysisresultsthataretransferred from Abaqus/Standard or Abaqus/Explicit. Ob

9、taining restart files isdescribedinmore detailin “Writingrestartfiles” in “Restartingan analysis,”Section 9.1.1; brief summaries are providedbelow.By default,Abaqus/Standarddoesnot writeanyrestartinformationand Abaqus/Explicitwritesresultsatthebeginning and end of each step.Saving results from Abaqu

10、s/StandardIf theresultsareto be imported from an Abaqus/Standardanalysis,the resultsfromthe original Abaqus/Standard job must be written to the restart (.res), analysisdatabase (.mdl and .stt), part (.prt), and output database (.odb) files. You canspecifytheincrementsatwhich restartinformationwill b

11、ewritten.Restartinformation is always written at the end of a step in addition to the requestedincrements whenever you request restart data in Abaqus/Standard.Input File Usage:*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“Restarting an analysis,”Section 9.1.1；下

12、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 (.mdl and .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。.InputFile *RESTART, WRITE, FREQUENCY=nUsage:Abaqus/CAEStep module:OutputRestart Requests: entern in the

13、 FrequencyUsage:column for each stepXpt 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。InputFile Use the following option to request results at the increments endingUsage:immediately after each time interval

14、:*RESTART, WRITE, NUMBER INTERVAL=n, TIME MARKS=NOUse thefollowingoptionto request resultsat theexact time intervals:*RESTART, WRITE, NUMBER INTERVAL=n, TIME MARKS=YESAbaqus/CAEStep module: OutputRestartRequests : entern in the Number IntervalUsage:column;clicktocheck the Time Marks column foreach s

15、tepifyou wantthe results written at the exact time intervalsSaving results from Abaqus/ExplicitIfthe resultsare to be importedfrom an Abaqus/Explicitanalysis,the resultsfromthe original Abaqus/Explicit job must be written to the state (.abq) file at thetimewhen transferof the stateof the deformed bo

16、dy isrequired.The state(.abq),restart (.res), analysis database (.stt), package (.pac), part (.prt), and outputdatabase (.odb)fileswillbe used forimportingthe resultsfrom Abaqus/Explicit.You can specify whether the results are to be written at the exact time dictatedby the specified time interval, n

17、, during a step of an Abaqus/Explicit analysis or at the increment ending after the time dictated by the specified time interval.Results are always written at the end of a step, so it is not necessary to request results at the exact time intervals if results will be read only from the end ofa step.I

18、nputFile Use the following option to request results at the increments endingUsage:immediately after each time interval:*RESTART, WRITE, NUMBER INTERVAL=n, TIME MARKS=NOUse the followingoptionto requestresultsat the exact time intervals:*RESTART, WRITE, NUMBER INTERVAL=n, TIME MARKS=YES.Abaqus/CAESt

19、ep module: OutputRestartRequests : entern in the Number IntervalUsage:column;clicktocheck the Time Marks column foreach stepifyou wantthe results written at the exact time intervals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 element set ，或者可以输入 part 实例从已经定义成装配件实例的 part 实

20、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 element set中输入数据和结果。输入的例子参见“ Springbackof two-dimensionaldraw bending, ” Sectionof theAbaqus Example Problems Manual, and“Axisymmetric forming of a circular cup,”。InputUse the following option to import element sets from a previous analysis:FileUsage:*IMPORTlist of ele

21、ment sets that are to be imported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element set的名字在*import输入行必须在原始文件的截面定义中使用过，（）， element set仅能包含不超过三种类型的单元。在 CAE里面只能从 PART INSTANCES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part instances里面的一致，每个instance的名字应该保持一致，只有import

22、 instance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InputFile Use the followingoptions to import apartinstance from a previousUsage:analysis:*INSTANCE, INSTANCE=instance-nameAdditional set and surface definitions (optional)*IMPORT*END INSTANCEAbaqus/CAEIn Ab

23、aqus/CAE you can import model data and results only from modelsUsage:that are defined as assemblies of part instances.Load module:CreatePredefinedField : Step:Initial: choose Other forthe Categoryand InitialStateforthe Types forSelectedStep : selectthe instances to which the initial state should be

24、assignedSpecifying the transfer ofmodel data and resultsThe import capability is used totransfermodel data and resultsfrom one analysisto another. The following sections describe how to specify the import request. You can import element sets from models that are not defined as assemblies of part.ins

25、tances,oryoucanimportpart instancesfrommodelsthatare definedasassemblies of part instances. In Abaqus/CAE you can import model data and resultsonly from models that are defined as assemblies of part instances.Specifying the transfer of model data and results for modelsthat are not definedas assembli

26、es of part instancesYou can importelement setsfroma previous analysis tospecifythetransfer of modeldata and results for models that are not defined as assemblies of part instances.This import capability is illustrated in“ Springback of two-dimensional drawbending,” Section1.5.1oftheAbaqus Example Pr

27、oblems Manual, and “ Axisymmetricforming of a circular cup,” Section 1.3.7 of the Abaqus Example Problems Manual.InputUse the following option to import element sets from a previous analysis:FileUsage:*IMPORTlist of element sets that are to be importedTo preventany ambiguityregardingelementand node

28、definitions,the *IMPORToptionmust be specifiedbeforeany optionsthatdefine additionalmodel datain theinputfile.Inaddition,the*IMPORToptioncan be specifiedonlyonce.Each element set namespecified on the data line of the*IMPORToptionmusthave been used ina section definition option(e.g.,*SOLID SECTION)in

29、 theoriginal analysis. An element set can contain no more than three differenttypes of elements.Abaqus/CAEIn Abaqus/CAE youcan import modeldata andresults only frommodelsUsage:that are defined as assemblies of part instances.Specifying the transfer of model data and results for models that are defin

30、ed as assemblies of part instancesYou canimport part instancesfrom a previous analysis to specify the transfer ofmodel data and resultsfor models thataredefinedas assembliesof partinstances.If you importmore thanone part instance,thepartinstancesmust be from the sameoutput database(.odb) file and al

31、l import parameters must be the same for eachimportedpartinstance.Each instancename thatyou specifymustbe thesame as theinstance name in the original analysis. Only sets that are defined within theimported instance will be imported.Sets defined at the assembly level must beredefined in the import an

32、alysis.New set definitions and surface definitions canbe added upon import. You cannotassignnew sections,materialorientations,normals,or beam orientations to the imported part instance.InputFile Use the followingoptions to import apartinstance from a previousUsage:analysis:*INSTANCE, INSTANCE=instan

33、ce-nameAdditional set and surface definitions (optional)*IMPORT*END INSTANCEAbaqus/CAEIn Abaqus/CAE you can import model data and results only from modelsUsage:that are defined as assemblies of part instances.Load module:CreatePredefinedField : Step:Initial: choose Other forthe Categoryand InitialSt

34、ateforthe Types forSelectedStep : selectthe instances to which the initial state should be assignedIdentifying the analysis from which the data will be obtainedYou must specify the name of the job from which the model and results data will be obtained.Input FileFor all models you can enter the follo

35、wing input on the command line:Usage:abaqus job= job-name oldjob=oldjob-nameIf theoldjobparameter is omitted, Abaqus will prompt for the job name(see“ Abaqus/Standard, Abaqus/Explicit, and Abaqus/CFD execution,”).Alternatively, for models defined as assemblies of part instances, you can use the foll

36、owing option:*INSTANCE, LIBRARY= oldjob-nameIf you import more than one part instance, theoldjob-name specified bythe LIBRARY parameter must be the same for each imported part instance.Ifthe job name isspecifiedon the command lineusingthe oldjoboption,the command line specification will take precede

37、nce over the LIBRARY parameter.Abaqus/CAEIn Abaqus/CAE you can import model data and results only from modelsUsage:that are defined as assemblies of part instances.Load module:Create PredefinedField : Step:Initial: choose Other fortheCategory andInitial Statefor theTypes for Selected Step:Jobname: o

38、utput-database-name从包含的数据文件中指定分析数据.必须具体制定包含数据和结果文件的名字InputFileFor allmodels you can enterthe followinginputon the commandline:Usage:Importing model dataElement property definitions of imported elements can be redefined only if thereference configuration is updated (see“Updating the imported configur

39、ation”)and the material state is not imported (see“Importing the material state”). Inthis case the material orientation definitions( “Orientations,” Section2.2.5 ),hourglass stiffness but not hourglass control definitions, and transverse shearstiffnessdefinitions(inthecase of shellelements)oftheimpo

40、rtedelements canalso be redefined.For otherreferenceconfigurationand materialstatecombinations,theinformationrequired todefine the sectionfor each imported element will be imported from theoriginalanalysis.Materialorientationscannotbe redefinedintheimportanalysis;orientation names cannot be reused i

41、n the import analysis. For imported elements,the materialorientationswillbe transferredfrom theoriginalanalysis.Transverseshear stiffness for imported shell elements cannot be redefined; the values willbe transferred from the original analysis. Hourglass stiffness for the importedelements cannot be

42、redefined in an Abaqus/Standard import analysis; the defaultvalues willbe used. The sectioncontroldefinitions(kinematicformulation,orderof accuracyin theelementformulation,andhourglasscontrolapproach)tobe usedfor imported elements cannot be redefined (see“Transferring results betweenAbaqus/Explicit

43、and Abaqus/Standard,” Section 9.2.2, for details).Only nodes associated with the imported elements are imported. New nodes can be defined in the import analysis.Nodes or elementsthatuse the same numbers as nodes orelementsbeingimportedcanbe definedprovidedthatthe referenceconfigurationisupdated,the

44、materialstateis not imported, and the import is not done from an instance library. The newdefinitionswilloverwritethe importeddefinitions.Ifthereferenceconfigurationis notupdated,new nodes or elementscannot use the importednode and elementnumbersirrespective of whether or not the material state is i

45、mported.Duringresultstransferfrom an Abaqus/StandardanalysistoanotherAbaqus/StandardanalysisorfromanAbaqus/ExplicittoanotherAbaqus/Explicitanalysis,thecoordinatesofimportednodescanbemodifiedfromtheirimportedvaluesbyrespecifying the nodal definitions if the reference configuration is updated andthe m

46、aterialstateisnotimported.This modificationofthecoordinatesof importednodesisnotallowedduringtransferofresultsfromAbaqus/ExplicittoAbaqus/Standard or vice versa.Importing model data defined by a distributionWhiletransferringresultsfrom oneAbaqus/StandardanalysistoanotherAbaqus/Standardanalysis,most

47、elementormaterialpropertiesdefinedby adistribution (see“Distribution definition,” Section 2.7.1 ) are imported alongwiththe elements. The only exceptionsarespatiallyvarying thicknessesandorientation angles defined on the layers of composite shells and solids; in this case Abaqus issues an error mess

48、age during input file preprocessing.While transferring results from an Abaqus/Explicit analysis to an Abaqus/Standard analysis, the only spatially varying element properties defined by a distribution that can be imported are shell thicknesses and section orientations for shell and solid elements. If

49、 any other element or material properties are defined with a distribution, Abaqus issues an error message during input file preprocessing.While transferring results from an Abaqus/Standard analysis to an Abaqus/Explicitanalysis or from an Abaqus/Explicit analysis to another Abaqus/Explicit analysis,

50、the only spatially varying element properties defined by a distribution that canbe imported are shellthicknesses,sectionorientationsforshell and solidelements,orientationanglesdefined on the layersof compositeshells,and sectionstiffnessmatrices specified directly for general shell sections. If any o

51、ther element ormaterialpropertiesare definedwith a distribution,Abaqus issues an errormessageduring input file preprocessing.Importing results from an Abaqus/Standard analysis (other than a direct cyclic analysis)If the results are imported from an Abaqus/Standard analysis, you can specify the step

52、and increment in the restart file for which the results are to be imported. By default, the results written at the end of the analysis are imported.Input File *IMPORT, STEP=step, INCREMENT=incrementUsage:For models that are defined as assemblies of part instances, the *IMPORT option must appear with

53、in a part instance definition.Abaqus/CAEIn Abaqus/CAE you can import model data and results only from modelsUsage:that are defined as assemblies of part instances.Load module:Create PredefinedField : Step:Initial: chooseOther forthe Categoryand InitialStateforthe Typesfor Selected Step : selectinsta

54、nces:Step : selectSpecify :step and Frame:selectSpecify :increment.Importing results from an Abaqus/Standard direct cyclic analysisIf the results are imported from a direct cyclic analysis, you can specify the step and iteration number in the restart file for which the results are to be imported. By

55、 default, the results written at the end of the analysis are imported.InputFile *IMPORT, STEP= step , ITERATION= iterationUsage:For models that are defined as assemblies of part instances, the *IMPORT option must appear within a part instance definition.Abaqus/CAEIn Abaqus/CAE you can import model data and results only from modelsUsage:that are defined as assemblies of part instances.Load module:Create PredefinedField : Step:Initial: chooseOther forthe Categoryand InitialStateforthe Typesfor Selected Step : selectinstances:Step : selectSpecify :step and Frame:selectSpecify :