Creating Constraints

Altair Forum User

What does this size value indicate while creating a constraint for certain nodes in HyperMesh ?

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

Altair Forum User

Hi JCD

The size value just means the dimension of the graphic symbol of the constraint (in model units).

 

Altair Forum User

Altair Forum User said:

Hi JCD

The size value just means the dimension of the graphic symbol of the constraint (in model units).

 

Also, Whats the use of values near to dof1, dof2, .. And so on.? 

Its a constraints why they are in need of magnitudes?

Q.Nguyen-Dai

When you have value = ZERO => that's 'NULL' constraints (fixations).

But when you have value != ZERO =>  that's 'PRESCRIBED' contraints

tinh

They are needed when you use SPCD to force some nodes to have an exactly displacement

Thinking that formular of SPC is: DOF_i = D, and normally you want to fix nodes so you let D=0

Altair Forum User

Altair Forum User said:

Also, Whats the use of values near to dof1, dof2, .. And so on.? 

Its a constraints why they are in need of magnitudes?

Thank you.

I tried and I got it. 

Altair Forum User

Altair Forum User said:

Thank you.

I tried and I got it. 

Can you please explain again I didn't get the use of textbox in front of the DOF.

Simon Križnik

@Sumit Patil

 

the textbox next to DOF is used to input enforced displacement value.

https://altairuniversity.com/learning-library/how-to-apply-enforced-displacements-correctly/

check the following video where it is used at 6:37