×
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

SPC, MPC in FEMAP

SPC, MPC in FEMAP

SPC, MPC in FEMAP

(OP)
How can I generate MPC and SPC in FEMAP (NASTRAN for Windows) ?
Irwin

RE: SPC, MPC in FEMAP

But when you generate a parametric model, you modify the geometry, so, it would be more suitable to apply a load on geometric surfaces than on elements or nodes of mesh? But in such a case, whatever the  modelling software used, is the mesh already attached to the geometric model, so that results could be realistic?

RE: SPC, MPC in FEMAP

I am assuming that you want to apply SPC's for enforced motion.  Constraints to ground are straight-forward and are applied by going to model, constraint, nodal, etc...

Also, I am also assuming that your want to apply mathematical MPC, and not rigid MPC's, as rigid MPC's are straight forward and are applied by going to model, element, rigid.

There is no easy way to use the FEMAP graphical user interface to define these types of elements.  What I have done in the past is to create a NASTRAN bulk data deck for these elements and to read them in when you solve your model.  You can do this by going to file, analyze and picking the "advanced" box.  When you do this, FEMAP will allow you to enter files for executive & case control, as well as bulk data.  When you get to the bulk data input window, check the box for "include file" or "type data" to read in your SPC or MPC data.

pj

RE: SPC, MPC in FEMAP

(OP)
As I understand well: I have to type everything in a text file! No chance to generate inside the program?!

Irwin

RE: SPC, MPC in FEMAP

Irwin,

You can model the constraint equations in the program, although I have never done it before.  You can do this by going to "model, constraint, equation..."  You will then get a menu where you can enter the independent node, DOF, coefficient, dependent nodes, etc. for the MPC.  If you want the SPC, you will need to go to "model, load, nodal..", select your node, then you will get a menu where you can pick "enforced displacement" and then enter the displacement.

pj

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