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Define Attackpoint for Force/ Simple Question?

Altair Forum User

Hello everyone,

i do a FEM Project with HyperMesh and now im at a point where i need some help (First time with HyperMesh)

I have to do a FEM analysis where various forces attack a beam. The Problem is that the Beam is not symmetrical but i have to define a Force in direction to the Z-axis. (Picture 2) The Force should attack at the center of gravity otherwise the beam will be twisted.

My Question is:

Where/ how can i define that point (cog) or force where the beam only bends down and dont twist?

previous attempts:

Pic 3. --> But it twisted. It is logical because of the lever arm
Singe Force on the Top of the beam near the CoG but also twisted

My Solver is Optistruct.

Pic1.

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

Maybe someone can help me /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' />

Thanks

Pic.2 (Force F has to been define )

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

Pic 3

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

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Pranav Hari

Hi Samorit

Can u share the model file. I will check and update

You can use secure transfer link if needed

https://ftin.india.altair.com:8443/filedrop/~Ma3TaE

Altair Forum User

Hi Pranav Hari

Yes of cause.

I found out how to see the coordinations of cog and created a node there. This is also the attackpoint of force. But i cannot create a connection with the center of gravity and the element of my mesh..

Unable to find an attachment - read this blog

Altair Forum User

Hi @Samorit

Since you know the CoG, you can create a node there and create an RBE3 element to distribute your loads in the cross section