1、ABAQUS显隠转换分析.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“Tr
2、ansferring 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
3、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 thi
4、s 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 result
5、s 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 m
6、ay 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
7、 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/
8、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 restart
9、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, Abaqu
10、s/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 r
11、estart (.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 restar
12、t 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“Writing restart files” in “Restarting an analysis,” Section 9.1.1；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(.mdl and .stt)，PART(.prt),和输出数
13、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。Input File Usage: *RESTART, WRITE, FREQUENCY=nAbaqus/CAE Usage: Step module: OutputRestart Requests: enter n in the Frequency 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
14、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。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, N
15、UMBER 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 impo
16、rted 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 outp
17、ut 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
18、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 a
19、fter 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 ch
20、eck the Time Marks column for each step if you want the 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“Springback of two-dimensional
21、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
22、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，（e.g.*solid section），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part instance,part instance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 instan
23、ce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: I
24、n 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 s
25、hould 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 assembli
26、es 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
27、 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
28、,” 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 p
29、revent 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
30、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
31、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 m
32、ore 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 definit
