×
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

Extracting physical mass out of ansys

Extracting physical mass out of ansys

Extracting physical mass out of ansys

(OP)
I am trying to use the ansys mode shapes for reduced order modeling outside of ansys. I have the displacements, but not the effective mass at each node. It seems like this should be trivial, but I am having trouble.

I can export the mass matrix, but these are element masses, not physical masses, and therefore depend on the specific shape functions of the elements. I tried using the lumped mass option in a modal analysis and wrote out the mass matrix using the hbmat command, but recognized that these masses were not simply the mass at each node.

So... If you wanted to get the effective mass attributed to each node in a lumped mass formulation, how would you do it?

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