Pressure Maps

Pressure Maps

Anonymous
Not applicable
3,839 Views
19 Replies
Message 1 of 20

Pressure Maps

Anonymous
Not applicable

Hi guys,

 

i´m having a problem to display pressure maps generated by wind simulation, i had to erase the first wind simulation cases and do it again, and now i just can´t see the pressure maps.

 

Can anyone help me?

 

pressure Maps missing.PNG

0 Likes
Accepted solutions (1)
3,840 Views
19 Replies
Replies (19)
Message 2 of 20

piperr
Advocate
Advocate

Forcas geradas automaticamente ?Smiley Wink

0 Likes
Message 3 of 20

Rafacascudo
Mentor
Mentor
Pode mandar o modelo?

Rafael Medeiros
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes
Message 4 of 20

Artur.Kosakowski
Autodesk Support
Autodesk Support

Hi @Anonymous

 

Is it the same if you run next simulation with the same parameters?



Artur Kosakowski
0 Likes
Message 5 of 20

Anonymous
Not applicable

It is the same parameters but with aditional structural elements.

i did delete the previous wind simulation cases and run it again, the forces are generated, but the pressure maps doesn´t appear anymore.

0 Likes
Message 6 of 20

Artur.Kosakowski
Autodesk Support
Autodesk Support

Hi @Anonymous

 

I made a quick test and I can't see any issue with pressure map display. Try the steps below:

 

pressure map.png

 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.



Artur Kosakowski
0 Likes
Message 7 of 20

Anonymous
Not applicable

I did those steps with no success. Very strage indeed, because only some claddings disappear, and no pressure maps are displayed.

Wind Case pressure maps off.PNG

Wind Case pressure maps on.PNG

0 Likes
Message 8 of 20

Artur.Kosakowski
Autodesk Support
Autodesk Support

Hi @Anonymous

 

As @Rafacascudo  already asked  - could you attach this model?



Artur Kosakowski
Message 9 of 20

Anonymous
Not applicable

@Rafacascudo@Artur.Kosakowski , it already occured in other models when i needed to simulate wind more than once.

0 Likes
Message 10 of 20

Rafacascudo
Mentor
Mentor
Accepted solution

Machini4,

 

All claddings have to be perfectly flat for them to work. That´s  your  main problem concerning the wind generation. It will not generate loads on chosen claddings if they are not flat.

 

But this "unflatness" comes from the fact that your model has lots of "imprecise modelling" . Check below some  of the truss nodes coordinates on "Cartesiano P" axis.

 

coordinate imprecision.jpg

 

Probably you created the claddings with many "snaps" turned on and certainly this is the most common cause for so many imprecisions.

 

You should very much correct your model . Try using Edit/detailed correct .

 

I prefer ALWAYS to build the model snapping to nodes . Avoid snapping to grid points!!!

 

Correcting your nodes will automatically correct most of your bar positions. Only then you should correct your claddings .

 

There´s an excelent tool to check and correct cladding flatness on

 

https://forums.autodesk.com/t5/Autodesk-Robot-Structural/API-addin-checking-flatness-of-panels-conto...

 

Using it I was able to make most of your claddings to "receive" load from the wind generator. As you can see below , Some are still not getting wind load

 

wind.jpg

 

This below are the messages when I ran your model just for this wind load I created.

 

messages.jpg

 

Instability Type 1 cannot be ignored. Check the webinar 16 about instabilities on Build your Robot Structural Analysis IQ - YouTube

 

For good practices on panel modelling check webinars 1 an2 on the same link.

 

Also , there are some fixed supports on the upper levels!

 

There´s now a Brazilian Robot forum on

 

https://forums.autodesk.com/t5/robot-structural-analysis/bd-p/2052

Rafael Medeiros
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

Message 11 of 20

Anonymous
Not applicable

Thank you Rafael Medeiros.

I did correct the modeling imperfections and all came back to normal.

0 Likes
Message 12 of 20

Anonymous
Not applicable

@Rafacascudowrote:

Machini4,

 

All claddings have to be perfectly flat for them to work. That´s  your  main problem concerning the wind generation. It will not generate loads on chosen claddings if they are not flat.

 

But this "unflatness" comes from the fact that your model has lots of "imprecise modelling" . Check below some  of the truss nodes coordinates on "Cartesiano P" axis.

 

coordinate imprecision.jpg

 

Probably you created the claddings with many "snaps" turned on and certainly this is the most common cause for so many imprecisions.

 

You should very much correct your model . Try using Edit/detailed correct .

 

I prefer ALWAYS to build the model snapping to nodes . Avoid snapping to grid points!!!

 

Correcting your nodes will automatically correct most of your bar positions. Only then you should correct your claddings .

 

There´s an excelent tool to check and correct cladding flatness on

 

https://forums.autodesk.com/t5/Autodesk-Robot-Structural/API-addin-checking-flatness-of-panels-conto...

 

Using it I was able to make most of your claddings to "receive" load from the wind generator. As you can see below , Some are still not getting wind load

 

wind.jpg

 

This below are the messages when I ran your model just for this wind load I created.

 

messages.jpg

 

Instability Type 1 cannot be ignored. Check the webinar 16 about instabilities on Build your Robot Structural Analysis IQ - YouTube

 

For good practices on panel modelling check webinars 1 an2 on the same link.

 

Also , there are some fixed supports on the upper levels!

 

There´s now a Brazilian Robot forum on

 

https://forums.autodesk.com/t5/robot-structural-analysis/bd-p/2052


With that, I can not model a Sphere like a Radome? Can you check this File Rafa. I tried making a Sphere but I can not regenerate pressure on its Surface including the Maps.

0 Likes
Message 13 of 20

Rafacascudo
Mentor
Mentor

The Panel has to be flat . Your dome is just one panel . Iwould have to be made by a group of isolated flat panels.

I tried using an addin by @Rafal.Gaweda that transforms every single FE on an isolated panel .

https://forums.autodesk.com/t5/robot-structural-analysis/get-local-axis-of-finite-elements-via-api/m...

I have used it before on another model and it worked perfectly. But it is not working not on yours or any other.

Rafael Medeiros
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes
Message 14 of 20

Rafal.Gaweda
Autodesk Support
Autodesk Support

Hi @Rafacascudo

 

Converted dome attached (file for v.2018).

 

domepressuremap.jpg



Rafal Gaweda
0 Likes
Message 15 of 20

Rafacascudo
Mentor
Mentor

not here

error FE to panel.jpg

Rafael Medeiros
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes
Message 16 of 20

Rafal.Gaweda
Autodesk Support
Autodesk Support

Hi @Rafacascudo

 

What is Your Excel? 32 or 64 bit?

Macro should report 810 FEs instead of 29782.

PLease (re) register Robot as Admin and run it as Admin



Rafal Gaweda
0 Likes
Message 17 of 20

Rafacascudo
Mentor
Mentor

excel.jpg

How to re register robot as admin?

opening robot as admin gives the same error

opening excel as admin gives " Open Robot and load model"  warning

Rafael Medeiros
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes
Message 18 of 20

Rafal.Gaweda
Autodesk Support
Autodesk Support

Hi @Rafacascudo

 

From right hand click mouse menu:

 

componentregistrationw10.jpg



Rafal Gaweda
0 Likes
Message 19 of 20

Anonymous
Not applicable

i have the same problem and i can't solve it

0 Likes
Message 20 of 20

Artur.Kosakowski
Autodesk Support
Autodesk Support

Hi @Anonymous

 

What problem is it exactly?



Artur Kosakowski
0 Likes