×
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

Flexible dynamics (time history solution)

Flexible dynamics (time history solution)

Flexible dynamics (time history solution)

(OP)
Hi,

I'm using different methods in the flexible dynamics of ANSYS workbench to obtain a movement of a plate (that is clamped on one side and free on the other side, see: http://img12.imageshack.us/img12/6376/1604200925507.jpg ) in the first bending mode, by:

1) applying a pressure on one side of the plate, and releasing it shortly after
2) applying a pressure function = (amplitude*sinus(time*360*frequency))

In the first case the plate will move in resonance, but I can only control the resonance by changing the material properties of the plate, and the deformation is damped, so after 3 oscillations it almost doesn't move anymore.
In the second case the plate pressure frequency can be controlled, however it never matches the resonance frequency of the plate, so interference is created (amplitude will increase, and decrease, see: http://img12.imageshack.us/img12/9403/15042009211210.jpg ).

The movement of the plate (first bending mode) is going to be used in ANSYS CFX for fluid structure interaction. So the solution must be a time history solution like flexible dynamics.

My question: is there a way to exactly define the deformation of the plate in the first bending mode, in ANSYS Workbench (eventually flexible dynamics), and being able to follow a function (like amplitude*sinus(time*2*360*frequency)? Any idea is useful. Hope to hear your comments and hints.

Thanks in advance.
 

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