integrator DisplacementControl
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- Posts: 13
- Joined: Mon May 09, 2016 2:39 pm
integrator DisplacementControl
Hi all
Is it possible in Opensees to apply DisplacementControl on two points (or more) at the same time?
Is it possible in Opensees to apply DisplacementControl on two points (or more) at the same time?
Re: integrator DisplacementControl
If the displacements are the same you can add a equalDOF between the two (or more) nodes you want to see displaced?
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- Posts: 115
- Joined: Mon Feb 20, 2017 1:19 am
- Location: RMIT University, Melbourne, Australia
Re: integrator DisplacementControl
Yes, equal DOF can do it as they share the same degrees of freedom
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- Posts: 108
- Joined: Mon Sep 16, 2013 1:14 pm
- Location: University of Auckland
Re: integrator DisplacementControl
The integrator DisplacementControl receives just one node and one DOF, so you can not pass 2 nodes to the command. As previously stated one option is to constrain the node displacements with equalDOF command and pass just one node to the integrator, but that might be a limitation for your model in the case you want to have the two nodes moving free from one another.
What you could do, could be run the [analyze 1] command within a while loop and define the braking statement of the while loop as specific displacements for the two nodes. You can get the displacements of the nodes with the command [nodeDisp $node $DOF]. Example below
while {[nodeDisp $N1 $dir1] < $d1 && [nodeDisp $N2 $dir2] < $d2} {
...
analyze 1
....
}
What you could do, could be run the [analyze 1] command within a while loop and define the braking statement of the while loop as specific displacements for the two nodes. You can get the displacements of the nodes with the command [nodeDisp $node $DOF]. Example below
while {[nodeDisp $N1 $dir1] < $d1 && [nodeDisp $N2 $dir2] < $d2} {
...
analyze 1
....
}
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- Posts: 13
- Joined: Mon May 09, 2016 2:39 pm
Re: integrator DisplacementControl
Thank you all.