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#1 2020-05-09 16:29:28

mcerezo
Member
Registered: 2020-03-29
Posts: 2

[SOLVED] Sequential calculation - IMPORT RESULTS from previous stage

Hi, I hope any of you could help me with this trouble.

I have to do the analysis of a structural connection with several components.

The problem is that if i do the STAT_NON_LINE calculations in just one Stage, the analysis fails because of abscense of equilibrium. So, i need to introduce a presstressing load in bolts in a previous Stage in order to reach convergence in the second stage.

The idea of what i am trying to do is:
Stage1: (SOLVED, IT WORKS)
STAT_NON_LINE Calculation with the presstressing load in bolts (thermal load) and auxiliar boundary conditions (Fix some nodes) to get the solution.
RESU1=IMPR_RESU(...)

Stage2: (NOT EVEN CLOSE TO BE SOLVED)
STAT_NON_LINE Calculation with a external load in the connection.
1/My first doubt here is if it is possible to do a Stage2 with the results (RESU1) of the previous Stage, but with a different boundary conditions.
2/ My second doubt is basically... how to do it. I have tried many things that I have read in other posts to read the RESU1 file using LIRE_RESU, PROJ_CHAM,... but non of this works (or rather, i do not know how to make it works).



Thanks in advance for any advice.

Marcos.

Last edited by mcerezo (2020-05-28 11:55:09)

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#2 2020-05-10 07:53:18

konyaro
Member
From: Genève
Registered: 2016-04-02
Posts: 255

Re: [SOLVED] Sequential calculation - IMPORT RESULTS from previous stage

Hello,
you can easily chain 2 analysis by defining ETAT_INIT() in the second analysis.

If you want to carry the first analysis and then continue with the second one separately you must use the command POURSUITE(), cf. documentation and forum. In Asterstudy you can simply add a stage and it will handle the POURSUITE for you.

Below an example of a 2 stages study. The trick in this study is the option DIDI in order to keep the displacements of the first study:

Poursuite

Konyaro

Last edited by konyaro (2020-05-10 12:38:22)


Attachments:
poursuite.gif, Size: 152.45 KiB, Downloads: 246

失敗は成功のもと (L'échec est la base de la réussite)

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#3 2020-05-10 07:54:23

konyaro
Member
From: Genève
Registered: 2016-04-02
Posts: 255

Re: [SOLVED] Sequential calculation - IMPORT RESULTS from previous stage

Attached the complete study.


Attachments:
Study_poursuite.hdf, Size: 865.87 KiB, Downloads: 99

失敗は成功のもと (L'échec est la base de la réussite)

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#4 2020-05-11 13:55:40

mcerezo
Member
Registered: 2020-03-29
Posts: 2

Re: [SOLVED] Sequential calculation - IMPORT RESULTS from previous stage

Wooow! That is just what I was looking for! Thank´s a lot!

I would like to comment one detail i have seen in your example, why do you use AFFE_CHAR_CINE in Stage1 while you use AFFE_CHAR_MECA in Stage2?  Is there a hidden reason to do that? is it a technical reason?

I am diving deep into this kind of calculations, so I hope i could upload my progress during the  next days.

best regards,
Marcos.

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#5 2020-05-11 15:46:25

konyaro
Member
From: Genève
Registered: 2016-04-02
Posts: 255

Re: [SOLVED] Sequential calculation - IMPORT RESULTS from previous stage

I would like to comment one detail i have seen in your example, why do you use AFFE_CHAR_CINE in Stage1 while you use AFFE_CHAR_MECA in Stage2?  Is there a hidden reason to do that? is it a technical reason?

AFFE_CHAR_CINE is faster but cannot be used with DIDI.


失敗は成功のもと (L'échec est la base de la réussite)

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