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#1 2021-11-04 07:03:15

Registered: 2021-10-05
Posts: 19

How to do two nodes at the same coordinates

I am currently making a model in 1D.
I want to use LIAISON_DDL to change the degrees of freedom of a node, but for that I need two nodes at the same coordinates.
But I don't know how to do it. Does anyone know how to do it in Geometry?

This question has nothing to do with Code-aster, but I would like you to answer it.


#2 2021-11-04 09:33:53

From: nantes (france)
Registered: 2009-03-12
Posts: 3,707

Re: How to do two nodes at the same coordinates

putting two nodes at the very same place is calling for troubles
this is explained in appendix C 3.4 in my book

make them at a distance inferior to the the meshing critical length you use in meshing
1 mm could be a good value

consider reading my book
freely available here https://framabook.org/beginning-with-code_aster/