# Is there any way to apply acceleration history to structural nodes?

**URL:** <https://forum.itascainternational.com/t/is-there-any-way-to-apply-acceleration-history-to-structural-nodes/742>\
**Category:** FLAC3D\
**Created:** [September 7, 2022, 2:05pm UTC](https://forum.itascainternational.com/t/is-there-any-way-to-apply-acceleration-history-to-structural-nodes/742 "2022-09-07T14:05:42Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![ppk](https://avatars.discourse-cdn.com/v4/letter/p/7ab992/32.png) [@ppk](https://forum.itascainternational.com/u/ppk)\
**Post date:** [September 7, 2022, 2:05pm UTC](https://forum.itascainternational.com/t/is-there-any-way-to-apply-acceleration-history-to-structural-nodes/742/1 "2022-09-07T14:05:42Z")

</div>

I’m trying to find natural period of structures constructed with beam and shell elements.

Sweeping test which applies sinusoidal waves with increasing frequencies is planned but I can’t find any way to apply (displacement, velocity, acceleration) histories to the structural nodes.

---

<div class="post-metadata">

**Author:** ![ppk](https://avatars.discourse-cdn.com/v4/letter/p/7ab992/32.png) [@ppk](https://forum.itascainternational.com/u/ppk)\
**Post date:** [September 8, 2022, 1:12am UTC](https://forum.itascainternational.com/t/is-there-any-way-to-apply-acceleration-history-to-structural-nodes/742/2 "2022-09-08T01:12:26Z")

</div>

I have resolved the problem by my self. 😊  
The sweeping test can be performed by either displacement or force control.  
So, force histories could be applied to the structural node.

---

<div class="post-metadata">

**Author:** ![Ankitkumarsuman1](https://avatars.discourse-cdn.com/v4/letter/a/8491ac/32.png) [@Ankitkumarsuman1](https://forum.itascainternational.com/u/Ankitkumarsuman1)\
**Post date:** [January 22, 2026, 12:03pm UTC](https://forum.itascainternational.com/t/is-there-any-way-to-apply-acceleration-history-to-structural-nodes/742/3 "2026-01-22T12:03:23Z")

</div>

For Shell elements, we can not get acceleration histories, but for beam and pile elements, actually, we can obtain them through “struct node history name “acc-x” acceleration-x position (0,0,0).”  
I tried it, and I got the histories. You can try it and see if it works for you. (FLAC 3D- 7.0)