Step-by-Step Tutorial Session 1 - Front Wing Design Study (Part 1)

I just realized that the material point has to be outside. Everything is working fine now. Thank you!

Just wanted to answer :wink: Glad you found out! :slight_smile:

Best,

Jousef

hey can you help me to find where is the problem i have the same error but i can’t fix it

Hi @mostafanovek!

Which software are you using? Did you try downloading another model from a user, delete the frontwing and add yours with OnShape for instance?

Edit: Sorry but I see now that you are referring to the simulation errors and not a modelling error. Will see what I can do for you @mostafanovek! Getting back to you as soon as I know more.

Cheers!

Jousef

Hi @mostafanovek.

You can try to restart the simulation now. Let me know if it works.

Best,

Jousef

What is a center of rotation for the main wing? What does that mean? If I want to have my own wing simulated would I need to find out where the center of mass is?

Best regards,
Zaapex

Hi @Zaapex!

The point is the center of gravity. If it’s a uniform object it is the center point (like center of a sphere or rectangle etc.). For complicated structures one has to find it through some other techniques @yosukegb4, @pfernandez and @1318980 might give you more information about.

Best,

Jousef

Hi @Zaapex, you can do all sorts with the centre of rotation. If you set it to the centre of gravity you can see how much moments are created around it which might be useful for calculating forces on suspension, grip on roads etc. But there is no requirement as to where it is, it is just where you are calculating the moments around, it could be arbitrary if you need it to calculate the center of pressure or something or set to something more physically meaningful as mentioned above.

Hope this helps,
Darren

2 Likes

Hello,

I am having a problem that after I meshed the standard wing, I dont have the same views as you guys. I cant see the solid_0_FWing and solid_o_flap. It seems that it all disappeared but I still have the mesh. Have a look at the photos. So when I try to select boundary conditions on the wing it looks like there is something wrong. Also when I am selecting the force moments. Looking forward to hearing from you.

Here is a link to my project with everything ready to simulate: https://www.simscale.com/workbench/?pid=3208119190490234883&mi=spec%3Af0eaee74-adce-4a44-9813-2c596d22bebb%2Cservice%3ASIMULATION%2Cstrategy%3A97&ps=analysis%2FIncompressible--oneOf%2FresultControl%2FforcesMoments%2F1

Here are photos:

Problem1

Problem3

@yosukegb4, can you help our user here please? :slight_smile:

Hi @ThorkellH !

I added your ASCII SLT solid name after endsolid and upload the fixed STL data in my project at URL below.

solid FWing
...
endsolid FWing
solid flap
...
endsolid flap

Screenshot of fixed data

Does this solve your problem?

Best,
Yosuke

2 Likes

Hello!

Thank you for replying! This link only takes me back to my dashboard. Not sure what to do with it. I dont get access to your project if that was the intention.

Looking forward to hearing from you. Another problem though, is that the running time exceeds the public community timelimit. I cannot change the number of proccessors in the simulation control. I can only choose automatic, up to 16 cores. See image below.

And this is the error I get:

Capture1

Hi @ThorkellH ,

I’m sorry the project was private.
I changed the test project public.

And is another problem core hours issue? @jousefm

Best,
Yosuke

1 Like

You can ask the @power_users to run the project for you or buy additional core hours - if you want to do the latter, feel free to get in touch with me.

Best,

Jousef

1 Like

Hi @yosukegb4!

I would love to run your case, but can’t see the simulation saved in the project you shared.

Best regards,
Evgenii

thank you

Hello again Yosukegb4!

Thank you for you comment and access to your project with the upoaded STL data. It works better now but it is not perfect.

Now after I mesh it, and try to select air as the material I can only select the boundary volume. And it looks like the wing has become a part of the boundary volume. Does is still look okay? See image below:

I get this bounding volume while you get an item called Region0 and it has access to the wing objects. The plus sign under region0 that opens those files up. Why do I not get the same access? I could still select the faces for the wall no-slip BC and force and moment calculations but I had to select them by hand. I could not select the main wing for an example with one click. I had to select all the faces of the main wing manually. Maybe that is okay, I’m not sure. I just don’t understand why I get different options.

Looking forward to hearing from you.

Hi @ThorkellH ,

How about switching to “Select Face” as shown below?

Best,
Yosuke

2 Likes

Thank you for that tip. I wil try it.

I notice that you are using ‘Orthogonal’ view when you are selecting mesh faces.

If you use ‘Perspective’ mode, you will be able to get the camera inside the bounding volume. Once inside, if you click and drag on a face that is on your geometries surface, the click point will be your rotational point.

With those two abilities, you will be able to select mesh geometry faces more easily…