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Non linear support

13 REPLIES 13
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Message 1 of 14
Fouzifs
683 Views, 13 Replies

Non linear support

Hello,
I would need some help on this model please. I would like to define non linéar supports that would maintain the structure only in one direction (when the horizontal effort is is "compressing" the structure against the support) and would be null for the other way (when the horizontal effort is "pulling" the structure).
Herewith please find the model i'm talking about.
Gratefully,
Fouzi

13 REPLIES 13
Message 2 of 14
Artur.Kosakowski
in reply to: Fouzifs

UX plus.PNG

 

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Artur Kosakowski
Message 3 of 14
Fouzifs
in reply to: Fouzifs

Thanks for your answer,
I tried it but it tells me that the calculation doesn't converge.
I've tried to put these supports in UX+ and UX-, it nerver converges.

Message 4 of 14
Artur.Kosakowski
in reply to: Fouzifs

For UX+ it is only for case 3 which is wind load. As it doesn't act alone the convergence of this load case is irrelevant as long as all defined combinations converge. 

 

Case 1 : Poids propre pierre
Analysis type: Static - Nonlinear

 

 

Non-linear process: convergent.
Maximum value of process parameter when convergence is obtained : 1.000
Maximum value of process parameter when convergence is not obtained : 1.000


Case 2 : Vent en pression
Analysis type: Static - Nonlinear

 

 

Non-linear process: convergent.
Maximum value of process parameter when convergence is obtained : 1.000
Maximum value of process parameter when convergence is not obtained : 1.000


Case 3 : Vent en depression
Analysis type: Static - Nonlinear

 

 

Non-linear process: divergent.
Maximum value of process parameter when convergence is obtained : 0.975
Maximum value of process parameter when convergence is not obtained : 1.000


Case 4 : ELU 1 (1,35 PP)
Analysis type: Nonlin. Combination

 

 

Non-linear process: convergent.
Maximum value of process parameter when convergence is obtained : 1.000
Maximum value of process parameter when convergence is not obtained : 1.000


Case 5 : ELU 2 (1,35PP+1,5VP)
Analysis type: Nonlin. Combination

 

 

Non-linear process: convergent.
Maximum value of process parameter when convergence is obtained : 1.000
Maximum value of process parameter when convergence is not obtained : 1.000


Case 6 : ELU 3 (1,35PP+1,5VD)
Analysis type: Nonlin. Combination

 

 

Non-linear process: convergent.
Maximum value of process parameter when convergence is obtained : 1.000
Maximum value of process parameter when convergence is not obtained : 1.000


Case 7 : ELS (PP+VP)
Analysis type: Nonlin. Combination

 

 

Non-linear process: convergent.
Maximum value of process parameter when convergence is obtained : 1.000
Maximum value of process parameter when convergence is not obtained : 1.000


Case 8 : ELS 2 (PP+VD)
Analysis type: Nonlin. Combination

 

 

Non-linear process: convergent.
Maximum value of process parameter when convergence is obtained : 1.000
Maximum value of process parameter when convergence is not obtained : 1.000

 

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Artur Kosakowski
Message 5 of 14
Fouzifs
in reply to: Fouzifs

So you're telling me, even if it doesn't converge, I'll have the right results?

Message 6 of 14
Artur.Kosakowski
in reply to: Fouzifs

The results for case 3 (divergent are wrong) but the results for combinations (convergent) are correct but my assumption is that the reason you created the combinations is that you don't have case 3 acting on the structure alone. If yes, the fact it converges or not  is not important as you need to have the results for the combinations only. In other words simple load cases could only be the treated as definitions of loads and not calculated at all.

 

To put it in yet another way: if you have unidirectional support that doesn't work if you pull it and then you actually pull it (case 3) you probably don't expect to have the convergence (right results), don't you? Smiley Happy

 

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Artur Kosakowski
Message 7 of 14
Fouzifs
in reply to: Fouzifs

I see... Thank you for your answer!
How could I, please, set simple cases as definition loads so they aren't calculated?

Message 8 of 14
Artur.Kosakowski
in reply to: Fouzifs

how to set cases as aux.PNG

 

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Artur Kosakowski
Message 9 of 14
Fouzifs
in reply to: Artur.Kosakowski

Thanks a lot!

Message 10 of 14
Fouzifs
in reply to: Artur.Kosakowski

Still not working! 😞
I still have negativ supports where they should be null... 😞

Message 11 of 14
Artur.Kosakowski
in reply to: Fouzifs

Attach the modified model please.



Artur Kosakowski
Message 12 of 14
Fouzifs
in reply to: Artur.Kosakowski

Thanks.

Message 13 of 14
Artur.Kosakowski
in reply to: Fouzifs

parameters of analysis.PNG

 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.



Artur Kosakowski
Message 14 of 14
Fouzifs
in reply to: Artur.Kosakowski

Thanks a lot!
Now It works perfectly!

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