Mismatch (Error 10037) in SGN analysis of lightweight aluminum structure

Product Support
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Good morning,
I am designing an aluminum hall. During the analysis of ultimate limit states (ULS) for combinations of variable loads, I receive error/warning no. 10037 with the message: "The required accuracy of iterative calculations has not been achieved. The results may be unreliable. Increase the maximum number of iterations." When I calculate just the structure itself – self-weight – no error appears, everything calculates correctly. However, when I also consider wind loads, the problem occurs. I increased the number of iterations from 100 to 300, but the problem remains the same.

I don't know whether to increase the number of iterations further or what I should do?

Thank you in advance for your help.

4

Hi GMAdrian000,

thanks for your message!

To analyse the problem more precisely, the model file would be very helpful:

:right_arrow: Click on File → Save as and choose the following settings to reduce the file size:

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image467×393 7.53 KB

:right_arrow: Then upload the file here (e.g. *.rf6, *.rs9) – this way, the community can also contribute to the solution.

:owl: Prefer not to share the file publicly? No problem – send it to me via direct message: click on my profile picture or user name → Message.

Best regards
Stefan Hoffmann

5

Ok, I am sending my RFEM file as an attachment.
Hala namiotowa aluminiowa - blok 11grudnia kopia.rf6 (2.1 MB)
Generally, it seems to me that the error number 100037 suddenly disappeared, but I added imperfections, calculated all SGN combinations, and another error appeared: number 100040 - "Too many eigenvalues are required." What is the cause of this?

6

Hi GMAdrian000,

Thanks for providing the model! :blush:

With the current customer version, I don't get any errors when calculating the ULS design situation.

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image1920×1080 1.09 MB

Please update to the latest customer version and try the calculation again.
You can download it here:

:backhand_index_pointing_right: https://www.dlubal.com/en/support-and-learning/support/faq/005108

If any issues remain, feel free to get back to me — we’ll figure it out together. :light_bulb:

Best regards
Stefan Hoffmann

8

Good morning, I just downloaded the latest version of the program, went to Ultimate Limit State (ULS), clicked calculate, but I can already see that at least one combination shows an error. I am sending a screenshot.
image

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Hi GMAdrian000,

I tried it this morning again and I still face no error. Maybe you can try to resend the model once?

Best regards
Stefan Hoffmann