CA equivalent for RBE2 and RBE3

hello

i am here again

if you read careffully the documentation about LIAISON_DDL, U4.44.01,

you will find out that the key words COEF_MULT and COEF_IMPO allow some amplification factor to the displacement from one DDL to the other

by the way they are just mandatory!

difficult to explain, better read yourself

you should carefuuly read the doc and make benchmarks to find out what is happening

i admit that the doc maybe hard to understand

and that the writing of this command is extremely cumbersome

but it is no easier in NASTRAN

i once made a NASTRAN model with several hundreds RBE2, it was a nightmare, and only linear statics!

i rather use K_TR_D_L it is much easier to understand what you are doing

jean pierre aubry

Hoi,

I just throw in my use of LIAISON_DDL:

you can make the internal relations as complex as you want. As long as you understand.

kind regards - kees

I guess something similar to what Kees has been doing is the way to go for the RBE2/RBE3 addict.

Sincerely

Claes

elements RBE2,RBE3 have geometric stiffness in left and right rotation

they converge to the same results, but geometric stiffness of RBE2,RBE3

are non symetric. RBE2,RBE3 work as linear relations in linear solver

Pdupuis75

Hi,

As should be indicated soon in a news, RBE3 have been made available in Code_Aster 11.1.13..

This functionality has been evaluated on an industrial test case, but any additionnal feedbacks will be welcomed.

Have a good day.

Bests,

Pierre

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