# Frequency Excitation

**URL:** <https://calculix.discourse.group/t/frequency-excitation/1792>\
**Category:** Uncategorized\
**Created:** [September 4, 2023, 12:51pm UTC](https://calculix.discourse.group/t/frequency-excitation/1792 "2023-09-04T12:51:06Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![MauPel](https://avatars.discourse-cdn.com/v4/letter/m/a9adbd/32.png) [@MauPel](https://calculix.discourse.group/u/MauPel)\
**Post date:** [September 4, 2023, 12:51pm UTC](https://calculix.discourse.group/t/frequency-excitation/1792/1 "2023-09-04T12:51:06Z")

</div>

Good Morning,  
I’d like to understand if it’s possible to perform in Prepomax/Calculix a dynamic stress analysis imposing a Displacement/Velocity/Acceleration Excitation in frequency on a specific node of a component.

Thank you.

---

<div class="post-metadata">

**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:** [September 4, 2023, 1:03pm UTC](https://calculix.discourse.group/t/frequency-excitation/1792/2 "2023-09-04T13:03:19Z")

</div>

Yes, this is called steady-state dynamics and is available in CalculiX and PrePoMax. For a prescribed boundary condition in this type of analysis, you should use the \*BASE MOTION feature. It’s not yet supported in PrePoMax but you can use the Keyword Editor to define it.