# Consecutive oscillating movements **URL:** \ **Category:** General Questions\ **Created:** [November 9, 2022, 7:19pm UTC](https://prepomax.discourse.group/t/consecutive-oscillating-movements/529 "2022-11-09T19:19:46Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [November 9, 2022, 7:19pm UTC](https://prepomax.discourse.group/t/consecutive-oscillating-movements/529/1 "2022-11-09T19:19:46Z")
HI, First of all, congratulations for the software. It, runs very soft and it is very intuitive. I’m trying to impose too consecutive oscillating movements , one on each side of a thin plate. The analysis runs for 2 seconds. From 0 to 1 second oscillates one side and from 1 to 2 seconds the other side should oscillate. Three comments about my result. (File attached) 1- I have probably set up something wrong but I can’t figure what is it. Oscillation from second 1s to 2s has some issue. It is not oscillating in the right direction Y as the other side correctly does. 2-I would like if possible that the Animation properties were saved with the file. 3-I’m not able to set my Solid\_part-1 opaque and I can see some annoying lines from the other side of the mesh. Thanks ![screenshot.81](https://global.discourse-cdn.com/free1/uploads/prepomax/original/1X/e53ffa25107228a7113cb6bb67e2bc5b0411fb74.png) [Test Loads Shifted in Time.pmx](https://prepomax.discourse.group/uploads/short-url/xQw3kntVGHocxloBjGM3ebja8uX.pmx) (2.2 MB) ---
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [November 9, 2022, 7:45pm UTC](https://prepomax.discourse.group/t/consecutive-oscillating-movements/529/2 "2022-11-09T19:45:55Z")
Another comment. ¿How can I change/reasign my loaded area?. The “more button” on “Set Selection” for the BC is not available now. ![screenshot.82](https://global.discourse-cdn.com/free1/uploads/prepomax/original/1X/9b401c361ec603c796cb0044fa6d54562e708b0d.png) ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [November 9, 2022, 7:47pm UTC](https://prepomax.discourse.group/t/consecutive-oscillating-movements/529/3 "2022-11-09T19:47:56Z")
Here are a few thoughts: 1. I’d rather use dynamic analysis in this case. 2. Is there a reason not to use shell elements for this very thin part ? 3. I would try doing this in 2 separate steps. 4. Try with a different solver. PaStiX may still show unexpected behavior in some cases. > [@ANYS](#): > > ¿How can I change/reasign my loaded area? You can still use geometry based selection or create a node set and assign the BC to it (change Region type to Node set name). ---
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [November 9, 2022, 7:53pm UTC](https://prepomax.discourse.group/t/consecutive-oscillating-movements/529/4 "2022-11-09T19:53:00Z")
Ok, I will try, Thanks ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [November 9, 2022, 7:55pm UTC](https://prepomax.discourse.group/t/consecutive-oscillating-movements/529/5 "2022-11-09T19:55:02Z")
One more thing - setting displacement BC back to zero doesn’t freeze the nodes in their current position but returns them to their initial position instead. ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [November 10, 2022, 8:51am UTC](https://prepomax.discourse.group/t/consecutive-oscillating-movements/529/6 "2022-11-10T08:51:02Z")
> [@ANYS](#): > > 3-I’m not able to set my Solid\_part-1 opaque and I can see some annoying lines from the other side of the mesh. Very thin solid meshes produce this undesired effect. I tried solving it but was not very successful. It is a bit better from version 1.3.0 in comparison to older versions but it still shows. ---
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [November 10, 2022, 9:43am UTC](https://prepomax.discourse.group/t/consecutive-oscillating-movements/529/7 "2022-11-10T09:43:07Z")
Yesterday I was finally able to solve it remeshing. I guess if shell issues could be solve expanding with two elements per thickness.?¿? 🧐 ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [November 10, 2022, 9:47am UTC](https://prepomax.discourse.group/t/consecutive-oscillating-movements/529/8 "2022-11-10T09:47:27Z")
There’s also one true shell element recently added to CalculiX. You can give it a try but it has some limitations. ---
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [November 10, 2022, 10:02am UTC](https://prepomax.discourse.group/t/consecutive-oscillating-movements/529/9 "2022-11-10T10:02:02Z")
> [@FEAnalyst](#): > > true shell element I will try too. Thanks both for the help.