Contact US

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!

*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

FEM and air resistance during harmonic study

FEM and air resistance during harmonic study

FEM and air resistance during harmonic study

The question is rather theoretical, since I implement the numerical method myself.

I perform harmonic studies of loudspeakers (structural mechanics), and now I'm wondering,
is there a way to consider air resistance without getting dynamics or fluent mechanics
involved? Doesn't really matter that the body is loudspeaker, the question concerns mostly
the method of harmonic study itself.

I'd be really grateful for a theoretical source or something. However, after searching myself
I'm under impression such thing has never been used or considered, but probably I didn't search

RE: FEM and air resistance during harmonic study

If you don’t want to model the air itself and perform FSI study then you can account for air resistance by introducing proper damping coefficient to the system.

RE: FEM and air resistance during harmonic study

Air is essentially a low rate, low density elastic material with low damping that conducts energy away from the loudspeaker. Energy put into air is eventually lost in materials in the environment or decreased due to spreading out. In loudspeakers where the rear of the speaker is sealed off there is a notable spring effect that affects the dynamics. It's not got significant flow characteristics, but it is dynamic, as is the speaker cone surface.

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! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close