Optistruct : Equal and opposite forces behaviour

Altair Forum User

Hello,

 

i am applying an equal and opposite force on my model (in +Z & -Z direction). I am expecting the displacement from both the sides in final result....but unfortunately the the displacement is only in +Z axis.

 

Is the solver first applying the force in +Z direction and then in -Z...... or does it apply forces simulateously in both direction?

 

I defined 2 different loadsteps for F1 & F2 (with same constraints and NLPRM card).

 

Pls help

 

Regards

Palash Agrawal

Altair Forum User

Hi Palash,

 

 

Is there a reason to you have both +Z and -Z force in separate load collectors?

 

Try with both loads in single load collector and single load step.

Altair Forum User

Hi Prakash,

 

thanks for the answer.

 

i tried it in single load step but still there is very little (0.6mm displacemement) in -Z direction as contratry to 5mm in +Z, but both forces are equal.

 

any guesses about this behaviour.

 

regards.

Altair Forum User

Palash,

 

Is the model/part symmetric?

Altair Forum User

Hi Prakash,

 

yes its symmetric.

Altair Forum User

Hi Palash,

 

can you share the model please?

Altair Forum User

Hi Prakash,

 

the model works now.

 

thanks anyways /emoticons/default_smile.png' alt=':)' srcset='/emoticons/smile@2x.png 2x' width='20' height='20'>

 

regards.