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Verification of boundary edges aborted - Remeshing of mech. set impossible on current time step

Hi all,

I'm currently working on static eccentricity in my motor design, but in trying solve the model, I'm encountering an issue that isn't immediately obvious to me and would appreciate your input.

The problem seems to be related to the air gap, as flagged by the software. I’ve structured the air gap into three regions:

One part attached to the rotor using a 6-degree-of-freedom mechanical set.
One part attached to the stator with a fixed mechanical set.
An inner air gap defined with a compressible mechanical set.

Note: I have not applied any periodicity due to the presence of the compressible air gap.

The flux 2d provides a notification referencing a specific line on the air gap boundary, which it identifies as being problematic I have inspected this line and found no visible issues. I have checked geometry, physics, and mesh, and flux 2d indicates that they are all correctly defined.

I've attached a ZIP file containing the model for reference. Thank you.

staic_eccen.FLU.7z

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Accepted answers

Letizia Ferrara

Hello,

In the model you shared the regions "AIR" and "STATOR_CORE" have the compressible mechanical set. Please change it to STATOR.

Unfortunately this is not the only error, I'm checking the model, I'll update you soon.

Best regards,

Letizia

Letizia Ferrara

Hello Acheamp,

You are welcome! The geometrical parameter GAP must be expressed in meters. Please adjust it, the model should works!

Best regards,

Letizia

Letizia Ferrara

ECC_macro_mask.jpg

Hello Acheamp,

The GAP is a parameter you have to enter in the mask of the macro and it is used to set the eccentricity in percentage. In your case should be 0.000215  [m]. Check the attached image.

Please visit the following page for more information: https://community.altair.com/discussion/39763/rotor-eccentricity-modeling-in-flux-easy-parametrization-with-new-6-degrees-of-freedom-feature

Best regards,

Letizia

All comments

Letizia Ferrara

Hello,

In the model you shared the regions "AIR" and "STATOR_CORE" have the compressible mechanical set. Please change it to STATOR.

Unfortunately this is not the only error, I'm checking the model, I'll update you soon.

Best regards,

Letizia

Acheamp

Hi Letizia,
Thank you very much for your feedback. I truly appreciate it.

I have reviewed the correction you pointed out and have now made the necessary changes. I will stay on standby for any further corrections or feedback. Thank you.

Best,
Acheamp.

Letizia Ferrara

Hello Acheamp,

You are welcome! The geometrical parameter GAP must be expressed in meters. Please adjust it, the model should works!

Best regards,

Letizia

Acheamp

Hi Letizia,

Thank you again for your feedback.

I adjusted the GAP value to 0.00215 m, but the system still solves without generating any curve. I had initially added the GAP just for my own reference and didn’t parameterize it, so I suspect that’s why changing the value isn’t affecting the solution.

Could you please elaborate on how you changed it to meters? I may have misunderstood your explanation.

Please find below an image showing how the system solves.

Best regards,
Acheamp.

Letizia Ferrara

ECC_macro_mask.jpg

Hello Acheamp,

The GAP is a parameter you have to enter in the mask of the macro and it is used to set the eccentricity in percentage. In your case should be 0.000215  [m]. Check the attached image.

Please visit the following page for more information: https://community.altair.com/discussion/39763/rotor-eccentricity-modeling-in-flux-easy-parametrization-with-new-6-degrees-of-freedom-feature

Best regards,

Letizia

Acheamp

Hi Letizia,
I have updated the gap value, and I’m happy to say everything is working smoothly now. Thank you so much for your patience and support in helping me work through this — I truly appreciate it.

Best regards,
Acheamp.