# Removing prescribed displacement Boundary condition in subsequent steps

**URL:** https://calculix.discourse.group/t/removing-prescribed-displacement-boundary-condition-in-subsequent-steps/1056
**Category:** Uncategorized
**Created:** [March 29, 2022, 11:04pm UTC](https://calculix.discourse.group/t/removing-prescribed-displacement-boundary-condition-in-subsequent-steps/1056 "2022-03-29T23:04:32Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![nikrouz.bah](https://yyz2.discourse-cdn.com/free1/user_avatar/calculix.discourse.group/nikrouz.bah/32/198_2.png) [@nikrouz.bah](https://calculix.discourse.group/u/nikrouz.bah)
#### Post date: [March 29, 2022, 11:04pm UTC](https://calculix.discourse.group/t/removing-prescribed-displacement-boundary-condition-in-subsequent-steps/1056/1 "2022-03-29T23:04:32Z")

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Greetings to everyone.

My question concerns a prescribed displacement Boundary condition that will be released in the following steps.  
One possibility is to save the results of a simulation and then use the \*INITIAL CONDITION, which appears to be a bit confusing in CalculiX (using \*dat file).  
This is the best course of action.

If the first approach fails, is there any way to remove the prescribed boundary condition in the subsequent steps?  
I want to completely disable it and avoid assigning a new displacement value.

Many thanks.

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### Author: ![dichtstoff](https://avatars.discourse-cdn.com/v4/letter/d/dec6dc/32.png) [@dichtstoff](https://calculix.discourse.group/u/dichtstoff)
#### Post date: [March 30, 2022, 5:36am UTC](https://calculix.discourse.group/t/removing-prescribed-displacement-boundary-condition-in-subsequent-steps/1056/2 "2022-03-30T05:36:21Z")

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maybe these can help you!?  
\*BOUNDARY, OP=NEW

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### Author: ![nikrouz.bah](https://yyz2.discourse-cdn.com/free1/user_avatar/calculix.discourse.group/nikrouz.bah/32/198_2.png) [@nikrouz.bah](https://calculix.discourse.group/u/nikrouz.bah)
#### Post date: [March 30, 2022, 4:03pm UTC](https://calculix.discourse.group/t/removing-prescribed-displacement-boundary-condition-in-subsequent-steps/1056/3 "2022-03-30T16:03:36Z")

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Hello again,  
Thank you for your suggestion.  
The OP=NEW option is applicable for the cases that a new displacement is prescribed in the new step.  
What I want is removing any prescribed boundary condition.  
Is there any way to use this option to release the structure from the previous prescribed displacement?

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### Author: ![Calc\_em](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@Calc\_em](https://calculix.discourse.group/u/Calc_em)
#### Post date: [March 30, 2022, 4:15pm UTC](https://calculix.discourse.group/t/removing-prescribed-displacement-boundary-condition-in-subsequent-steps/1056/4 "2022-03-30T16:15:20Z")

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> [@nikrouz.bah](#):
>
> The OP=NEW option is applicable for the cases that a new displacement is prescribed in the new step.  
> What I want is removing any prescribed boundary condition.  
> Is there any way to use this option to release the structure from the previous prescribed displacement?

That’s just how it works. Quote from the User’s Manual:

> OP=NEW implies that previously prescribed displacements are removed.

You don’t have to define new BCs after \*BOUNDARY, OP=NEW.

There’s also \*BOUNDARY, FIXED option but it freezes the deformation from the previous step.