×
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

Kinematic Coupling in Modelling Rigid Diaphragm

Kinematic Coupling in Modelling Rigid Diaphragm

Kinematic Coupling in Modelling Rigid Diaphragm

(OP)
Hi IceBreakerSours
I am a civil engineer, recently i was trying to model a three-dimensional steel frame with rigid diaphragm, to do this i have to use Kinematic Coupling in ABAQUS. However i am geting some error. For example i define an extra RP(reference point) at each story level and constraint three dof (U1,U2,UR2)(2 translational and 1 vertical rotational dof) of the Coupling Node to the RP. However i think because of using the Kinematic constraint, The dof of RP is now activated which means that the dof that i am not constraint (U2,UR1,UR3) to can be free to translate and rotate, so i'm starting to get error due to the singularity problems. I try to fix the problem by providing a boundary condition to the unconstrained dof of the RP, however my result start to get ugly because the extra boundary that i specified (eg. i think the boundary condition provide an extra constraint to U2 which is the vertical displacement of my frame that is supposed to be independent with the constraint equation). I am performing an geometrical and material non-linear analysis.

I was just wondering if you have any thought to my problems.

Many Thanks.

Peter

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