×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

ABAQUS Explicit - define rotary inertia for a rigid body reference node

ABAQUS Explicit - define rotary inertia for a rigid body reference node

ABAQUS Explicit - define rotary inertia for a rigid body reference node

(OP)
Hi everyone,

I have got the following problem I require some assistance with: suppose you got a rigid body (for instance,a rigid plate), which is globally restrained using boundary conditions on the reference node - every displacement and rotation is restrained, except for the vertical displacement of said rigid plate.

Now, I want to release one of the rotations, which requires the definition of a rotary inertia. My idea is that I need to define a ROTARYI element, which contains my rigid plate reference node.

*RIGID BODY, REF NODE=SupportPlate.40, ELSET=SupportPlate.SupportPlateElements

*ROTARY INERTIA, ELSET=??
I11, I22, I33, I12, I13, I23

My question is, how do I define the ELSET, which includes the REF NODE, as defined in the *RIGID BODY line?

Thanks in advance for any input on this.

RE: ABAQUS Explicit - define rotary inertia for a rigid body reference node

(OP)
Regarding my previous question, I realize that my question was not too clear. So, let me try again...

I have defined a rotary inertia element set (1 ROTARYI element, 1 node) with *ROTARY INERTIA. Now I want to associate this element with a rigid plate reference node, which is a well defined node set in my model. Does anyone know how to do this? It is worth mentioning I am writing an input file..

RE: ABAQUS Explicit - define rotary inertia for a rigid body reference node

Hi,

You need to define your inertia element at reference node of rigid body.

CODE

**
** rigid body definition
*RIGID BODY, REF NODE=1000, ELSET=myRigidBody-ELSET
**
** create rotary inertia element at rigid body reference node
*ELEMENT, TYPE=ROTARYI, ELSET=myInertia-ELSET
  1, 1000
**
** define rotary inertia
*ROTARY INERTIA, ELSET=myInertia-ELSET
 i11, i22, i33, i12, i13, i23
** 

Regards,
Bartosz

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources