Learning Forum

[castrohenrique0208]

Hello, 

I'm trying to perform an acoustic simulation of a plate+cavity.

I have designed the plate and the acoustic body, but when I try to insert the acoustic FSI interface by selecting the face of the acoustic body in contact with the plate, it doesn't work. 

Can anyone help me? 

 

[Erik Kostson]

 

Hi

Do not use the ACT extension.

 

Use the ANsys native acoustics systems called Harmonic Acoustics.

See here for a tutorial

https://www.youtube.com/watch?v=Kq3iuYK52gc

 

Also now when you have acoustic domain on one side only of the shell, that is OK - use shared topology so share nodes on the interface between the 2 domains and avoid using contacts between them (see tutorial where share topology is used) .
(As we said we can not have an acoustic domain on both sides of a shell/surface body, but on one side like shown in the image is OK)

All the best

Erik

 

[castrohenrique0208]

Hi Erik

 

I want to perform an modal simulation to extract the modes using only the panel, then the acoustic cavity and then the system panel+ acoustic cavity.

After I want to perform an harmonic analysis to extract the sound pressure level generated in the system panel + acoustic cavity.

I don't know if the video that you sent apply for this case, because I am using the acoustic body below the panel (surface not a solid), as you can see in the image. 

 

My main goal is to extract the sound level pressure, but I'm a little bit ansure about the process. 

 

I try to do as you said using the harmonic acoustic, but i'm still get it the same ? error when trying to apply the FSI. 

I'm sending the link of the project, if you can see it would be great. 

 

 

https://drive.google.com/file/d/1Z4rF8_8GrcDAtkhSrxcktSqV-H69sgCE/view?usp=drive_link

 

[Erik Kostson]

Hi

It is because you are still using the ACT extension.

Do not use the extension and it is fine as you found out since you posted another post where it all works ok.

Erik

PS: Ansys Empl. can not downlaod any files - perhaps some forum members can help

[castrohenrique0208]

Hello Erik, 

 

Can you explain me why I can't use the ACT extension for this case? 

 

Thanks in advance.