Creating the design and non design spaces

Altair Forum User

Hello all,

 

I am new to topology optimization and I need your help to create the design and non-design spaces.

What is the best way to do this?

 

Should I create 2 different bodies in the part in Catia V5 in order to get 2 different components in Hypermesh, and then connect and mesh them?

In this case, how could I connect the 2 components?

Or should I create only one main body and define the non design space within Hypermesh? (But the design of the part is not simple. I fear this might be difficult)

 

Feel free to contact me if I'm not clear enough

 

Thank you very much

 

Best regards

Florian

 

tinh

Hi,

You can connect 2 comps by sharing their nodes, binding with rbe2/rbe3,... or contact

Altair Forum User

Dear Tinh,

 

Thank you very much for your answer.

But how do you share their nodes?

Do you mean that I have to mesh both components to create nodes on each of them and then share those nodes?

 

Thanks a lot

 

tinh

Yes, I do

sharing nodes means using panel F3 to replace one node by other, or shift F3 to equivalence nodes

Altair Forum User

The problem is that there are far too much nodes on the surfaces I would like to connect...

Is there a way to select all nodes from a defined surface?

Is it possible otherwise to merge surfaces? It sounds easier for the part I work on!

 

Thanks a lot again

Altair Forum User

I think I found a way to achieve what I want through the boolean operations in the solid edit tab.

I choose the advanced operation type, the A+B operation and I combine through none.

With a simple part, it works perfectly.

However, when I try with the part I have to optimize, it says 'internal error'

Where could this error come from?

There are no other indications.

Is there a way to know what this mistake is caused by?

 

Thanks

Florian

tinh

you said two comps are far from each other, so in fact, how they are connected?

Altair Forum User

@Florian Kimmerlin

 

Can you share a picture of the model?

 

Two components are far from each other and how the load will act on each other?

Altair Forum User

Thanks for your answers.

Sadly, for confidentiality reasons, I can't share the part with you, sorry.

However, the picture 1 at the end of this message is a small bit of the part for you to understand.

The 2 components are the pink and the brown ones.

I want to connect the 2 components ( create a partition surface between them).

With a simple design (pictures 2 and 3), it works without problem.

However, the part I work on is very complicated, and it keeps saying 'internal error'.

Sadly, I'm not able to identify where the error comes from.

<?xml version="1.0" encoding="UTF-8"?>

<?xml version="1.0" encoding="UTF-8"?>

<?xml version="1.0" encoding="UTF-8"?>

tinh

I don't see they are far from each other, try sharing their nodes

Altair Forum User

Ok I will try this

 

Thank you very much!