Example: Using assemblies concepts in Pre/Post

This example demonstrates how you can leverage your knowledge of assemblies, and of assembly relationships among CAE files, to model certain problems more efficiently.

For this example, consider a simple assembly of two hinged blocks. The assembly exists in two named arrangements, Open (the default) and Closed.

Assembly using Open arrangement.

Assembly using Closed arrangement.

Suppose you create a FEM file and idealized part file based on the assembly part in the Closed arrangement.

How would you update the FEM file to match the master part assembly in the Open arrangement?

You might start by changing the arrangement that is applied to the master part assembly. For example:

1. Make the master part the displayed part.

2. Choose Start→Modeling.

3. In the Assembly Navigator, right-click the assembly node and choose Arrangements→Open.

4. Choose Start→Pre/Post.

5. Make the FEM file the displayed part.Note that the FEM file remains unchanged, and the new arrangement applied to the master part is not inherited by the FEM.However, remember the following:The FEM file is not an assembly and contains no components. The FEM file contains a pointer to a CAD part — in this case, it points to the idealized part file, which is a standard assembly that includes the master part as a component.The FEM file reads CAD geometry from the idealized part file and converts it to polygon geometry.Assembly arrangements do not directly control the positions of geometry, only of components.This means that in order to propagate the arrangement change to the FEM file, you must specify the arrangement in the context of the idealized part file.

6. Display the idealized part.Note that the idealized part is still using the Closed arrangement.

7. Choose Start→Modeling.The idealized part file is a standard assembly. You can use the Assemblies commands in Modeling to modify the idealized part directly.

8. In the Assembly Navigator, right-click the master part component node and choose Arrangements→Open.

9. Choose Start→Pre/Post.

10. Display the FEM file.Note that the polygon geometry is now updated to match the new configuration, and the mesh is out-of-date.

11. Choose Home tab→Context group→Update Finite Element Model to update the mesh.

Learn more

Assemblies concepts in Pre/Post

Positioning the FEM within a Simulation file

FE model in context

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Example: Using assemblies concepts in Pre/Post, Simcenter 3D 2021.1 Series

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