Help on cylindrical BCs

Hoi Ashraf

first of all: you need to copy the ''result'' of the python script into the command file, not the script itself. [This is because the script runs in Salome, not in Code Aster.]

You have a circular plate. You want to add cylindrical boundary conditions to it on the outer edge, right? [Note that this can be done but then you will have a rotating shell in your system with rigid body movements, so it is not quite clear to me which you movement really want to restrict.]

You can select all the nodes on the outer edges and then apply the bc to it. I can help, but it is much easier if you upload the hdf file as well; not only the med file.

You need to create something along the following line:

cylco2=AFFE_CHAR_MECA(MODELE=model,
LIAISON_DDL =
_F(NOEUD=('N1','N1'),DDL=('DX','DY'),COEF_MULT=(1.0,0.0),COEF_IMPO=0.00),
_F(NOEUD=('N26','N26'),DDL=('DX','DY'),COEF_MULT=( 0.0, 1.0 ),COEF_IMPO=0.00),),)

since
node 1 has coordinates [x;y] = [1.0;0.0]
node 26 has coordinates [x;y] = [0.0;1.0]

The python script does just that: writing this out for you.
It just repeats this for all the nodes on the edge.

kind regards - kees<br /><br />Post edited by: Kees Wouters, at: 2010/08/31 22:57