×
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

[ANSYS] Bellmouth boundary conditions

[ANSYS] Bellmouth boundary conditions

[ANSYS] Bellmouth boundary conditions

(OP)
I'm using ANSYS Workbench 16.2 and trying to analyze the stress due to gravity, a thermal condition and a pressure. The geometry is essentially a pipe that flares out at one end and has a flange at the other end. I'm using cyclic symmetry. In order to constrain the bellmouth from axial motion, I've treated the downstream flange face as a frictionless support. I'm not sure the best way to prevent transverse motion. I had thought of treating the bolt holes as a fixed support, but that is not realistic, as the flange this piece is bolted to will also be growing radially due to thermal growth as well as the pressure.

Any advice is appreciated.

RE: [ANSYS] Bellmouth boundary conditions

Since the displacements are constrained to be cyclically symmetric, there can't be any rigid body translational motion so no need to constrain it.

There can be rotation about the symmetry axis. For that, you can constrain a single node in the tangential direction. It doesn't matter which one. That's just the point that won't rotate while the rest of the structure deforms around it. It should show zero reaction forces to confirm it's not interfering with the deformation.

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