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cylindrical reference system

  • Thread starter Thread starter funambolica
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funambolica

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good morning to all, I would like to know if someone knows if it is possible to insert a cylindrical reference system in meca salome.
reading on the various forums and sites I read that in code-aster just consider a problem with bc cyclic... and even if it is a workaround the solution is fine. In my case I have a cylindrical geometry and I have to set displacements in radial direction but I have seen that code-aster only lets me insert dx, dy and dz.
before you blow it all up and go back to ansys... Can you give me a hand?
Thank you very much in advance:wink:
 
I see it as a free program... so he can have his limits.. .
If I had paid, I'd be very angry. .
It's a pity that code-aster is so little documented (and in addition to in French...), it probably will also do many things... but if few know the features of the program... What's the point?
 
funambolica said:
reading on the various forums and sites I read that in code-aster just consider a problem with bc cyclic... and even if it is a workaround the solution is fine. In my case I have a cylindrical geometry and I have to set displacements in radial direction but I have seen that code-aster only lets me insert dx, dy and dz.
Click to expand...
I did research on the code-aster forum and I think you should use the angl_naut command to define radial constraints.

However, I invite you to ask directly on the code-aster forum where it is very likely that you will be given an answer.
http://www.code-aster.org/forum2/viewforum.php?id=12Saluted.
 
funambolica said:
I see it as a free program... so he can have his limits.. .
If I had paid, I'd be very angry. .
Click to expand...
The program is very powerful, it really does everything, from modal analysis to crack propagation to contacts.

The problem as you say is that it's very difficult to use.
 
Are you using the wizard? I think you can only consider dx, dy and dz because it was born for very simplified simulations (it only counts pressure. . . )
I searched for a bit in the documentation and some reference to the polar coordinates I found it, although I did not deepen, I fear however that it is to put hands to the simulation code (the .comm file)

in 2009 the documentation (not all) is also in English

Hi.
 
zeigs said:
Are you using the wizard? I think you can only consider dx, dy and dz because it was born for very simplified simulations (it only counts pressure. . . )
I searched for a bit in the documentation and some reference to the polar coordinates I found it, although I did not deepen, I fear however that it is to put hands to the simulation code (the .comm file)
Click to expand...
exact, with the "linear elasticity" wizard you can only:

1) define ground constraints on surface groups or knots
2) impose pressure (even negative to simulate tractions) on groups of surfaces

to go more 'in' (simulation of assemblies, sliding constraints, imposition of weight force and centrifugal force) you have to use the eficas editor and compose the hand comm file.

Bye.
 
thank you all for the answers.
I realized that with the wizard in fact you could not... in my problem there is also plasticity and contact, so with the wizard I go not far unfortunately. . .
I will try to write also in the code-aster forum, although I would prefer to see some .comm files already ready (I read on the hunter tutorial that on the site you can download some... but I did not find them...).
 
funambolica said:
I realized that with the wizard in fact you could not... in my problem there is also plasticity and contact,
Click to expand...
Hi, I'm putting you on a case that I'm studying at the didactic level where there's a tree-flange force.

there is also a soft-spring even if it is not made according to the aster code method (which would be the use of discrete modeling with k_t_d_n rigidity matrix), that is the next step.

attachments find the template file and the command comm file. If you go to message 14 of this discussion you will find an example of asymmetric modeling.
http://www.code-aster.org/forum2/viewtopic.php?id=12967ciao.
 

Attachments

Hi.
In fact, as the hunter said, I think the only way is to use the liaison_oblique command, or the various liaison_groups associated with angl naut appure liaison-ddl etc.
I have done this question several times on the forum but I have never had answer, however unfortunately to define a spherical hinge you can but nn is then so immediate, as on abaqus or on ansys, however on this post on the forum might be interesting to you to understand. . .http://www.code-aster.org/forum2/viewtopic.php?id=13349, in general the sw is very powerful, nn will perhaps be at the levels of abaqus, ansys or nastran but little we miss...

jacopo
 
Uh...
All right, all right, now I have at least one starting point to start trying something.
Thank you!
The link you sent me seems enlightening. . .
[OT]I hope to find the power of this sw... unfortunately I have little time to study. . .[/OT]Thank you again!
 

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