Step01 Create SE
Contents
The data files for the project is in: SuEl_001\Case01\Step01\Data.
For the present tutorial example the user is assumed to be familiar with ParaGeo data and consequently only data required to explain the super element workflow will be discussed here.
The present example deals with the creation of the super element for the Platten group. All the geometry, boundary conditions, etc required to define the problem to be solved are defined in the data file (not discussed here). To perform the super element creation Super_element_control data structure must be specified in the data file as shown below.
Data File |
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* Super_element_control ! --------------------------------- Field "Gmech" Solution_type "Create" File_name "SuEl_001_Case01" Retained_geometry_sets IDM=1 "Top" Retained_groups IDM=1 "Billet"
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1.Field is set to "Gmech" so that a super element will be created for the geomechanical field (only option available at the moment) 2.Solution_type is set to "Create" so that in the present run the creation of the super element will be performed rather than a complete simulation run. 3.File_name is specified as "SuEl_001_Case01" so that the code will output a file named "SuEl_001_Case01.suelmat" which contains the super element matrix description. This file is the one that will later be used for simulations using the super element. 4.The geometry sets and groups that will not be condensed within the super element are specified using the Retained_geometry_sets and Retained_groups keywords respectively. In the present case the "Top" geometry set and "Billet" group are retained so they will not be condensed within the super element. 5.It should be noted that generally, from the non-retained groups (the ones that we are substituting with a super element) we need to retain any component to which a boundary condition is applied ("Top") and the nodes connected to the retained groups being solved (this is automatically retained). |
Results
The results for the project are located in SuEl_001\Case01\Step01\Results.
When running the data file the code will solve for a single time step and then will show the message ParaGeo completed successfully. The code will output the file "SuEl_001_Case01.suelmat" containing the super element matrix. That data file can now be used to run simulations using the super element (as described in Step02). Below there is a picture showing the super element with the corresponding retained freedoms. Note that all the nodes in the "Top" geometry set are retained as specified as well as all the nodes in the "interface" geometry set as they are connected with the retained groups.
Image showing the original mesh (left) and the created super element with the retained freedoms in blue (right)
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