ABAQUS顯隠轉(zhuǎn)換分析.doc

.2.1 Transferring results between Abaqus analyses: overviewProducts: Abaqus/Standard Abaqus/Explicit Abaqus/CAE References “Transferring results between Abaqus/Explicit and Abaqus/Standard,” Section 9.2.2 “Transferring results from one Abaqus/Standard analysis to another,” Section 9.2.3 “Transferring results from one Abaqus/Explicit analysis to another,” Section 9.2.4 *IMPORT *IMPORT ELSET *IMPORT NSET *IMPORT CONTROLS *INSTANCE “Transferring results between Abaqus analyses,” Section 16.6 of the Abaqus/CAE Users ManualOverviewAbaqus provides the capability to import a deformed mesh and its associated material state from Abaqus/Standard into Abaqus/Explicit and vice versa. This capability is particularly useful in manufacturing problems; for example, the entire sheet metal forming process (which requires an initial preloading, forming, and subsequent springback) can be analyzed. In this case the initial preloading can be simulated with Abaqus/Standard using a static procedure and the subsequent forming process can be simulated with Abaqus/Explicit. Finally, the springback analysis can be performed with Abaqus/Standard.Abaqus also provides the capability to transfer desired results and model information from an Abaqus/Standard analysis to a new Abaqus/Standard analysis or from an Abaqus/Explicit analysis to a new Abaqus/Explicit analysis, where additional model definitions may be specified before the analysis is continued. For example, during an assembly process an analyst may first be interested in the local behavior of a particular component but later is concerned with the behavior of the assembled product. In this case the local behavior can first be analyzed in an Abaqus/Standard or Abaqus/Explicit analysis. Subsequently, the model information and results from this analysis can be transferred to a second Abaqus/Standard or Abaqus/Explicit analysis, where additional model definitions for the other components can be specified, 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可以從隱式計算結(jié)果到顯示計算進行分析，該問題在求解一些問題是非常有用的，例如薄鋼的鍛造過程（經(jīng)歷預(yù)加載，成形和回彈），該分析預(yù)加載可以通過std分析，鍛造過程可以通過XPT進行分析，最后回彈可以再用std進行分析。ABAQUS也提供了從隱式分析到隱式分析和從顯示分析到顯示分析，例如可以先對感興趣的局部構(gòu)件進行分析，分析完成后，在對整個結(jié)構(gòu)作分析，前部的分析結(jié)果可以傳到后面的整體分析中。Saving the analysis resultsThe restart files from the original analysis contain the analysis results that are transferred from Abaqus/Standard or Abaqus/Explicit. Obtaining restart files is described in more detail in “Writing restart files” in “Restarting an analysis,” Section 9.1.1; brief summaries are provided below. By default, Abaqus/Standard does not write any restart information and Abaqus/Explicit writes results at the beginning and end of each step.Saving results from Abaqus/StandardIf the results are to be imported from an Abaqus/Standard analysis, the results from the original Abaqus/Standard job must be written to the restart (.res), analysis database (.mdl and .stt), part (.prt), and output database (.odb) files. You can specify the increments at which restart information will be written. Restart information is always written at the end of a step in addition to the requested increments whenever you request restart data in Abaqus/Standard.Input File Usage: *RESTART, WRITE, FREQUENCY=n保存分析結(jié)果重啟動文件包含了之前分析的信息，關(guān)于重啟動的描述參閱“Writing restart files” in “Restarting an analysis,” Section 9.1.1；下面做簡要介紹，默認(rèn)情況下，std不保存重啟動文件，xpt在每個分析部開始和結(jié)束步保存重啟動文件。Std結(jié)果保存如果想從std分析后獲得結(jié)果，原始的std分析必須保留重啟文件（.res），分析數(shù)據(jù)(.mdl and .stt)，PART(.prt),和輸出數(shù)據(jù)(.odb)文件，用戶可以指定具體的重啟位置，重啟信息除了在請求的位置輸出外在每一分析步的最后也將輸出。Input File Usage: *RESTART, WRITE, FREQUENCY=nAbaqus/CAE Usage: Step module: OutputRestart Requests: enter n in the Frequency column for each stepXpt結(jié)果保存如果想要從某一時刻輸入xpt分析的結(jié)果，則必須在原始的結(jié)果文件中保存.abq狀態(tài)文件，狀態(tài)文件重啟文件數(shù)據(jù)文件，PART文件和結(jié)果文件共同用來從xpt分析后的結(jié)果作為輸入?？梢跃唧w指定是否精確的時間輸出xpt重啟文件，因為xpt會在每個分析步的最后給出重啟文件。Input File Usage: Use the following option to request results at the increments ending immediately after each time interval:*RESTART, WRITE, NUMBER INTERVAL=n, TIME MARKS=NOUse the following option to request results at the exact time intervals:*RESTART, WRITE, NUMBER INTERVAL=n, TIME MARKS=YESAbaqus/CAE Usage: Step module: OutputRestart Requests: enter n in the Number Interval column; click to check the Time Marks column for each step if you want the results written at the exact time intervalsSaving results from Abaqus/ExplicitIf the results are to be imported from an Abaqus/Explicit analysis, the results from the original Abaqus/Explicit job must be written to the state (.abq) file at the time when transfer of the state of the deformed body is required. The state (.abq), restart (.res), analysis database (.stt), package (.pac), part (.prt), and output database (.odb) files will be used for importing the results from Abaqus/Explicit.You can specify whether the results are to be written at the exact time dictated by the specified time interval, n, 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 of a step.Input File Usage: Use the following option to request results at the increments ending immediately after each time interval:*RESTART, WRITE, NUMBER INTERVAL=n, TIME MARKS=NOUse the following option to request results at the exact time intervals:*RESTART, WRITE, NUMBER INTERVAL=n, TIME MARKS=YESAbaqus/CAE Usage: Step module: OutputRestart Requests: enter n in the Number Interval column; click to check the Time Marks column for each step if you want the results written at the exact time intervals指定模型數(shù)據(jù)的傳遞和結(jié)果下面講解如何指定具體的輸入請求，從一個模型數(shù)據(jù)和結(jié)果輸入到另一個模型數(shù)據(jù)和結(jié)果，用戶可以輸入從沒有被定義成裝配件的實例的element set，或者可以輸入part實例從已經(jīng)定義成裝配件實例的part實例。在CAE里面僅僅能從裝配件的構(gòu)件實例中輸入模型。指定從element set 中輸入數(shù)據(jù)和結(jié)果。輸入的例子參見“Springback of two-dimensional draw bending,” Section 1.5.1 of the Abaqus Example Problems Manual, and “Axisymmetric forming of a circular cup,” Section 1.3.7 of the Abaqus Example Problems Manual。Input File Usage: Use the following option to import element sets from a previous analysis:*IMPORTlist of element sets that are to be imported為了阻止模棱兩可的單元和節(jié)點，*import必須在定義額外模型數(shù)據(jù)前指定，另外*import只能指定一次每個element set的名字在*import輸入行必須在原始文件的截面定義中使用過，（e.g.*solid section），element set 僅能包含不超過三種類型的單元。在CAE里面只能從PART INSTANCES里面輸入結(jié)果和數(shù)據(jù)如果輸入的超過一個part instance,part instance必須從一個結(jié)果文件里輸入且輸入的參數(shù)必須和輸入文件part instances里面的一致，每個instance的名字應(yīng)該保持一致，只有import instance里面的sets才能被輸入，sets在assemblies定義的必須在import分析中重新定義，重新定義的sets不能修改輸入的新截面，材料的方向，法線，和梁方向Input File Usage: Use the following options to import a part instance from a previous analysis:*INSTANCE, INSTANCE=instance-name Additional set and surface definitions (optional)*IMPORT*END INSTANCEAbaqus/CAE Usage: In Abaqus/CAE you can import model data and results only from models that are defined as assemblies of part instances.Load module: Create Predefined Field: Step: Initial: choose Other for the Category and Initial State for the Types for Selected Step: select the instances to which the initial state should be assignedSpecifying the transfer of model data and resultsThe import capability is used to transfer model data and results from one analysis to 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 instances, or you can import part instances from models that are defined as assemblies of part instances. In Abaqus/CAE you can import model data and results only from models that are defined as assemblies of part instances.Specifying the transfer of model data and results for models that are not defined as assemblies of part instancesYou can import element sets from a previous analysis to specify the transfer of model data and results for models that are not defined as assemblies of part instances. This import capability is illustrated in “Springback of two-dimensional draw bending,” Section 1.5.1 of the Abaqus Example Problems Manual, and “Axisymmetric forming of a circular cup,” Section 1.3.7 of the Abaqus Example Problems Manual.Input File Usage: Use the following option to import element sets from a previous analysis:*IMPORTlist of element sets that are to be importedTo prevent any ambiguity regarding element and node definitions, the *IMPORT option must be specified before any options that define additional model data in the input file. In addition, the *IMPORT option can be specified only once.Each element set name specified on the data line of the *IMPORT option must have been used in a section definition option (e.g., *SOLID SECTION) in the original analysis. An element set can contain no more than three different types of elements.Abaqus/CAE Usage: In Abaqus/CAE you can import model data and results only from models that are defined as assemblies of part instances.Specifying the transfer of model data and results for models that are defined as assemblies of part instancesYou can import part instances from a previous analysis to specify the transfer of model data and results for models that are defined as assemblies of part instances. If you import more than one part instance, the part instances must be from the same output database (.odb) file and all import parameters must be the same for each imported part instance. Each instance name that you specify must be the same as the instance name in the original analysis. Only sets that are defined within the imported instance will be imported. Sets defined at the assembly level must be redefined in the import analysis. New set definitions and surface definitions can be added upon import. You cannot assign new sections, material orientations, normals, or beam orientations to the imported part instance.Input File Usage: Use the following options to import a part instance from a previous analysis:*INSTANCE, INSTANCE=instance-name Additional set and surface definitions (optional)*IMPORT*END INSTANCEAbaqus/CAE Usage: In Abaqus/CAE you can import model data and results only from models that are defined as assemblies of part instances.Load module: Create Predefined Field: Step: Initial: choose Other for the Category and Initial State for the Types for Selected Step: select the 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 File Usage: For all models you can enter the following input on the command line:abaqus job=job-name oldjob=oldjob-nameIf the oldjob parameter is omitted, Abaqus will prompt for the job name (see “Abaqus/Standard, Abaqus/Explicit, and Abaqus/CFD execution,” Section 3.2.2).Alternatively, for models defined as assemblies of part instances, you can use the following option:*INSTANCE, LIBRARY=oldjob-name If you import more than one part instance, the oldjob-name specified by the LIBRARY parameter must be the same for each imported part instance. If the job name is specified on the command line using the oldjob option, the command line specification will take precedence over the LIBRARY parameter.Abaqus/CAE Usage: In Abaqus/CAE you can import model data and results only from models that are defined as assemblies of part instances.Load module: Create Predefined Field: Step: Initial: choose Other for the Category and Initial State for the Types for Selected Step: Job name: output-database-name從包含的數(shù)據(jù)文件中指定分析數(shù)據(jù)必須具體制定包含數(shù)據(jù)和結(jié)果文件的名字InputFile Usage: For all models you can enter the following input on the command line:Importing model dataElement property definitions of imported elements can be redefined only if the reference configuration is updated (see “Updating the imported configuration”) and the material state is not imported (see “Importing the material state”). In this case the material orientation definitions (“Orientations,” Section 2.2.5), hourglass stiffness but not hourglass control definitions, and transverse shear stiffness definitions (in the case of shell elements) of the imported elements can also be redefined.For other reference configuration and material state combinations, the information required to define the section for each imported element will be imported from the original analysis. Material orientations cannot be redefined in the import analysis; orientation names cannot be reused in the import analysis. For imported elements, the material orientations will be transferred from the original analysis. Transverse shear stiffness for imported shell elements cannot be redefined; the values will be transferred from the original analysis. Hourglass stiffness for the imported elements cannot be redefined in an Abaqus/Standard import analysis; the default values will be used. The section control definitions (kinematic formulation, order of accuracy in the element formulation, and hourglass control approach) to be used for imported elements cannot be redefined (see “Transferring results between Abaqus/Explicit 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 elements that use the same numbers as nodes or elements being imported can be defined provided that the reference configuration is updated, the material state is not imported, and the import is not done from an instance library. The new definitions will overwrite the imported definitions. If the reference configuration is not updated, new nodes or elements cannot use the imported node and element numbers irrespective of whether or not the material state is imported.During results transfer from an Abaqus/Standard analysis to another Abaqus/Standard analysis or from an Abaqus/Explicit to another Abaqus/Explicit analysis, the coordinates of imported nodes can be modified from their imported values by respecifying the nodal definitions if the reference configuration is updated and the material state is not imported. This modification of the coordinates of imported nodes is not allowed during transfer of results from Abaqus/Explicit to Abaqus/Standard or vice versa.Importing model data defined by a distributionWhile transferring results from one Abaqus/Standard analysis to another Abaqus/Standard analysis, most element or material properties defined by a distribution (see “Distribution definition,” Section 2.7.1) are imported along with the elements. The only exceptions are spatially varying thicknesses and orientation angles defined on the layers of composite shells and solids; in this case Abaqus issues an error message 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 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/Explicit analysis or from an Abaqus/Explicit analysis to another Abaqus/Explicit analysis, the only spatially varying element properties defined by a distribution that can be imported are shell thicknesses, section orientations for shell and solid elements, orientation angles defined on the layers of composite shells, and section stiffness matrices specified directly for general shell sections. If any other element or material properties are defined with a distribution, Abaqus issues an error message during 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 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 Usage: *IMPORT, STEP=step, INCREMENT=incrementFor models that are defined as assemblies of part instances, the *IMPORT option must appear within a part instance definition.Abaqus/CAE Usage: In Abaqus/CAE you can import model data and results only from models that are defined as assemblies of part instances.Load module: Create Predefined Field: Step: Initial: choose Other for the Category and Initial State for the Types for Selected Step: select instances: Step: select Specify: step and Frame: select Specify: incrementImporting 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 default, the results written at the end of the analysis are imported.Input File Usage: *IMPORT, STEP=step, ITERATION=iterationFor models that are defined as assemblies of part instances, the *IMPORT option must appear within a part instance definition.Abaqus/CAE Usage: In Abaqus/CAE you can import model data and results only from models that are defined as assemblies of part instances.Load module: Create Predefined Field: Step: Initial: choose Other for the Category and Initial State for the Types for Selected Step: select instances: Step: select Specify: step and Frame: select Specify: iterationImporting results from an Abaqus/Explicit analysisIf the results are imported from an Abaqus/Explicit analysis, you can specify the st