Beam simulation

Simulation Generality
1

Hi all

I am currently doing a lot of calculation (simulation) of mechanically welded chassis.

I have a lot of errors of all types:

- beam / hull connection.voulmic?

- the imprint of connection....?

- Unstable model?

-Etc.

I'm looking for news, tutorials, or ways to understand the interactions between a beam connection and a surface.

Thank you in advance.

Cali.

1 Like
2

Do you have surfaces in your simulation?

2 Likes
3

See this tutorial

http://www.lynkoa.com/tutos/3d/l-analyse-de-structures-metalliques-dans-simulation-novembre-2010

@+ ;-))

4

I have volumes and beams, no surfaces.

 

Thank you

2 Likes
5

An image of my chassis.

 


chassis.jpg
6

Hi besecurite,

  I recommend the small free RDM le mans software, it is efficient and simple.

;) Gg

2 Likes
7

You have to be very careful about the different types of elements.

The connection between these different types is tricky, knowing that they do not all have the same number of degrees of freedom;

Beam:  6 ddl (3 moves, 3 rotations)

Plate: 5 DDL  (no normal rotation)

Volume: 3 DDL (no rotation)

As a result, a beam connected to a volume face is not rotated in its axis and is free to rotate, which generates calculation problems

 

Given the example shown, if it is a question of checking the cross-section of the beams,  a beam modelling may be sufficient. otherwise vommy model but be careful to manage the links between each element.

1 Like
8

Hello

 

Thank you all for your tips and tricks.

I think that we also need to work a lot on simple examples.

I solved my chassis by changing it to full volume.

 

See you soon.

Thank you