Preparing an assembly STEP file for ElmerGui using Salome 7
This tutorial is intended for a beginner on Salome and explains how to prepare an assembly saved in a .STEP file format to be processed in ElemerGui. Every instruction step is followed by a screen shot with highlights in red.
1. OPEN FILE
Open Salome 7. This is what it should look like:
Select Geometry Mode and, on the pop up window, click on New.
On the top menu, click on File – Import.
Select Files of Type as STEP files. On Look in: locate the STEP file you would like to work on and click Open.
On the following pop up window, click on Yes. This will make sure there is no scaling on the model:
Click on Fit All to fit the model in the screen.
To manipulate the model on the screen (on Windows): -Pan: Hold Control key and click and hold the left mouse button -Rotate: Hold Control key and click and hold right mouse button -Zoon in/out: mouse wheel -To fit the model on the screen: Fit All
2. EXPLODE GEOMETRY
On the Object Browser, click on the geometry to select it (figure 6). On the top menu, New Entity – Explode On the pop up window, on Sub-shapes Type, select Solid and then Apply. Select Face on Sub-shapes Type and click on Apply and Close. If there are a high number of faces, a pop up window will appear asking to confirm the operation. If that is the case, click on Explode.
On the Object Browser, click on the plus sign on the left side of the geometry to expand the exploded solids and faces. Note that there are different icons for solids and faces and on the left of those there are icons for visibility.
3. CREATE PARTITIONS
Select all solids and faces On the top menu click Operation – Partition. On the pop up window click on Apply and Close.
Note that a partition has been created in the Object Browser. As standard Salome names it Partition_1.
4. CREATE VOLUME GROUPS
On the Object Browser, right-click on Partition_1 and then Show Only. This will hide all the other elements and show only elements of the Partition_1. Right-click again on Partition_1 and then Create Group. In the pop up window select the Solid icon on Shape Type. On the 3D model of the assembly click on one solid. On the pop up window Click Add and then Apply. Repeat it for all the solids in the assembly.
On the pop up window select the Face icon on Shape Type. Select Geometrical parts of the Second Shape. Click on Second Shape icon. On the Object Browser click on Group_1. On the pop up window click on Select All and then Apply. On the Object Browser note the difference between solids and faces groups. Repeat the operation for all the solid groups. Make sure you only do this for the solid groups. Close the Create Group pop up window.
5. EXPLODE FACES
On the Object Browser select the first face group (identifiable by its icon). On the top menu click on New Entity – Explode. On the pop up window, on Sub-shapes Type, select Face and Apply. Select the next face group on Object Browser and click Apply on the pop up window. Repeat the operation for all the face groups and close the pop up window. Save the file.
6. CREATE MESH
Select Mesh Mode On the Object Browser click on Partition_1. On the top menu click Mesh – Create Mesh. On the Create Mesh pop up window, on Algorithm, select Netgen 1D-2D-3D. On the Hypothesis click on Settings icon. There will be two options. Chose the top one. A new window pops up. Click OK and it will close. Click Apply and Close.
On the Object Browser right-click on Mesh_1 and click Compute. Make sure you do this on Mesh_1 and not on Mesh. This operation could take a few minutes or longer depending on the size of the assembly. A summary window will pop up. Note any information that you might find relevant and close the window. Make sure Mesh_1 is visible (visible icon). Click on Fit All.
7. CREATE MESH GROUPS
On the Object Browser right-click on Mesh_1 and click Create Groups from Geometry. A window pops up. On the Object Browser click on the first solid group under Partition_1. On the pop up window click on the Geometry icon of Elements and Apply. Repeat this operation for all the solid groups. Make sure you do not do it for the face groups.
Select all faces under the first group of faces (under Partition_1). On the pop up window click on the Geometry icon of Elements and Apply. Repeat this operation for all the face groups and close the pop up window. Save the file.
8. EXPORT MESH
On the Object Browser right-click on Mesh_1 and click Export and UNV file. Select the location to save the file in Look in:, choose a name in File name and click on Save.