ANSYS APDL CERIG Question

[724napier]

Hello All,

I am creating an input file to generate a plate and create a rigid region on top of it. I am somewhat new to APDL and having trouble getting the CERIG command setup properly. I am trying to get it setup to select one master node and four slave nodes based off there X,Y,Z locations.

I used the following to select one master node and one slave node to create a rigid region and it works. However, I cannot figure out how to add the other three slave nodes based off there locations as inputs to the command.

CERIG,node(7.5,5,20),node(2.5,2.5,0),UXYZ, , , ,

The additional nodes I would like to set as slave nodes are

node(2.5,7,0)
node(7,2.5,0)
node(7,7,0)

I was thinking it is probably possible to use the nsel command, but I cannot figure out how to include that into the CERIG input. Any help is appreciated.

 

[Drej]

alls

mastern=node(7.5,5,20)

node1=node(2.5,7,0) 
node2=node(7,2.5,0) 
node3=node(7,7,0) 

nsel,s,node,,node1
nsel,a,node,,node2
nsel,a,node,,node3
nsel,a,node,,mastern

cerig,mastern,all,all,,

alls

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