Torque

Altair Forum User

Hi, 

 

I read in the forum I can define a toruqe in Radioss with the BC-manager. Concentrated load -> and direction in XX, YY, or ZZ. However, I can't define a rotation point. How to do that?

 

Thanks, J

Altair Forum User

Hi,

From the BCs manager for CLOAD select node option and select the node where the load is to be applied.

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

Altair Forum User

This is clear. But this node defines where the force is applied. But I want to define a point where my force rotates around. It should be a moment/torque. 

 

thanks! 

gopal_rathore

Hi,

You need to first make a skew at the point about which torque is being applied and then use XX,YY,ZZ in the load components based on skew axis direction and assign the magnitude.

Altair Forum User

Coool! Thanks for the response. That worked well! 

hyperlove

Altair Forum User said:

Hi,

You need to first make a skew at the point about which torque is being applied and then use XX,YY,ZZ in the load components based on skew axis direction and assign the magnitude.

 

I have two questions:

 

1. Can we create a skew coordinate system at somewhere which has some distance away from the torque-applying nodes (They are included in a GRNOD set) and choose XX of this skew as the Direction in/CLOAD card? What is really happening if a torque is defined like this?

 

2. For instance, I have 100 nodes that need to take a total of 200 N*mm torque. But I don't want to use RBE2 or RBODY to create this torque because rigid element will make all its connected nodes become a rigid body causing unwanted stiffing effects to a deformable part. How to maintain the original deformablity of a part but a torque can be defined on it?

 

Thank you.

Simon Križnik

Hi @hyperlove,

 

1. Skew in CLOAD definition is used to define a different coordinate system than the global system. Therefore the orientation (direction) of the skew axis is important, not its relative position. 

 

2. RBE3 elements are used to distribute loads without inducing unwanted stiffness. It is not an element to be used to model a connection, but rather an element to induce motion in a node as a function of the weighted average of other nodes. 

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