# \*dynamic - weird results

**URL:** https://calculix.discourse.group/t/dynamic-weird-results/2266
**Category:** Uncategorized
**Created:** [May 12, 2024, 10:49am UTC](https://calculix.discourse.group/t/dynamic-weird-results/2266 "2024-05-12T10:49:45Z")
**Posts on this page:** 1
**Showing post:** 11

<div class="post-metadata">

### Author: ![JuanP74](https://avatars.discourse-cdn.com/v4/letter/j/b5a626/32.png) [@JuanP74](https://calculix.discourse.group/u/JuanP74)
#### Post date: [May 13, 2024, 7:02pm UTC](https://calculix.discourse.group/t/dynamic-weird-results/2266/11 "2024-05-13T19:02:58Z")

</div>

I think Calc\_em is right, did you check the eigenfrequencies of the beam? and if you are creating large strains in the beam then the system is no longer linear…in Kraska example is stated

> the masses are represented by beam elements which are rigidized by an equation linking their nodes.

that makes the system linear again probably.

I plotted the input load (StartAndStop) but not sure about the units so didn’t checked the resulting strains

 ![Figure_1](https://global.discourse-cdn.com/free1/uploads/calculix/original/2X/4/41d6f01399c615d336db17245727982fd07ee734.png)

---

_[View the full topic](https://calculix.discourse.group/t/dynamic-weird-results/2266)._