×
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

FSI Squeeze Film damping, including ACEL

FSI Squeeze Film damping, including ACEL

FSI Squeeze Film damping, including ACEL

(OP)
Can anyone advise me, or point me to a resource that can help me with the following problem.

I'd like to analyze the fluid-structural problem for a clamped-clamped beam being subjected to an inertial half-sine acceleration using the ACEL command (like what would occur if the system is drop tested). There is fluid (air) between the beam and a fixed wall. As the beam deflects, it squeezes the fluid out from between itself and the fixed wall, creating a damping effect.

I have already used a squeeze film approximation (FLUID136) to obtain a damping ratio, which I can apply to a transient analysis to obtain the damped response. What I want to do now is to look at the change in damping as the beam undergoes a large transient deflection by using the Multi-Field Solver (FLUID142). My interest is in how the damping changes as the beam undergoes a significant displacement due to the inertial accleration.

Does anyone know of a resource for this type of problem? Are there any alternatives that I could try?
I have already ran simulations on the problem, but am not sure of the results. I can include the listing here.

Regards,
Dan Jordy

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