Learning Forum

[brentdl]

Hello,

I'm trying to do a thermal/structural simulation in Ansys 2019 R3 and then use the resulting deformed geometry in HFSS. Unfortunately I am experiencing a couple complications that I do not know how to resolve.

Using a very basic model (a dielectric slab with three thin, conducting strips), I use HFSS to create my initial geometry (out of familiarity). I link it to "steady-state thermal" and "static structural" modules and perform those simulations to get the deformed geometry, which I then export to a "mechanical model" and then finally to "geometry". I've attached an image depicting this linking in Workbench.

Original geometry:

Workbench flow:

Opening the final "geometry" with DesignModeler, the model has the expected deformation and there appears to be no undesired gaps or intersecting geometry. If I export the model to file and then import it into a new instance of HFSS, the geometry appears similar to how it did in DM, but with intersecting geometry and/or gaps. I'm not sure whether the problem has something to do with the quality of the export/import process, or if it is a problem in the structural stage of the simulation (such as contacts or boundary conditions).

Deformed geometry in DM:


Deformed geometry in HFSS:

Intersection/gaps aside, another complication in HFSS arises when it comes to defining the ports, as the surfaces aren't planar in the deformed geometry. Is there a way to simply preserve an area of the geometry from deformation or is some sort of geometry truncation necessary before analysis in HFSS?

Any advice or suggestions would be greatly appreciated.  Thank you!

 

[rtk]

Hello,

Please let me know in which file format you have exported the model, to get opened in Ansys HFSS.

 

Best Regards,

[brentdl]

Hello,

I actually solved this issue a couple days ago. It ended up being a combination of where I had my supports, and a very small thermal gradient.

To answer your question though, I had tried exporting to all the available file formats, but primarily worked with .stp files.

This post can be closed as resolved; thank you!

[Karthik Remella]

Good to know. Thank you.

Please go ahead and mark your post as 'Is Solution'. It might benefit others on the community.

Thank you.

Karthik

[shossain6]

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Hello Brentdl, Can you share any papers that are relevant to your work?

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