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Importing IGES Geometry into ANSYS from Mechanical Desktop

Mechanical Desktop is a more full-featured solid modeler than ANSYS. Therefore, you may want to do your mechanical modeling in Mechanical Desktop, and then do the finite element analysis in ANSYS. The following instructions should help you to accurately export IGES data from Mechanical Desktop and import it into ANSYS.

Below is our original Mechanical Desktop solid model.

Screenshot: Mechanical Desktop model

Select the File / Export / IGES menu in Mechanical Desktop.

Screenshot: Mechanical Desktop File Menu

Enter a name for the IGES file; you may want to use the convention of replacing the DWG extension in your Mechanical Desktop file with an IGS extension. For example, if your solid model was stored as bar.dwg, you might make your IGES file bar.igs

Screenshot: Mechanical Desktop IGES Dialog

Exit Mechanical Desktop and start ANSYS. Once you're in the ANSYS interface, select File / Import / IGES

Screenshot: ANSYS File Menu

In the first IGES dialog box, you may want to use the Defeature model option to eliminate very small features or graphical artifacts that ANSYS sometimes has a hard time handling. I-DEAS or other solid modelers may generate IGES files of differing quality, so you may need to use different options to import other programs' geometry.

Screenshot: ANSYS IGES Dialog

Select the filename of the IGES file you exported from Mechanical Desktop.

Screenshot: ANSYS File Dialog

The model geometry should cleanly import into ANSYS. If not, try clearing your session, and re-importing with different options.

Screenshot: ANSYS Model

Below is the final ANSYS mesh of the model after we'd picked an element type and used the meshtool to generate the mesh.

Screenshot: ANSYS Mesh

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