Learning Forum

[castrohenrique0208]

Hello everyone. 

 

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.

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

I try using the harmonic acoustic, but i'm get 2 error messages. 

1 - The program controlled far-field radiation surface detection option chosen in the analysis settings could not find any surface that are a part of absorption element/surface, impedance/radiation boundaries or artificially matched layers interface. The post processor will not be able to evaluate far field results. 

2 - An error occurred inside the POST PROCESSING module. 

If someone would like to see the project, i would send it.  

 

[Erik Kostson]

 

Remove  the far field result– take that away and it works.

 

 

 

Like it says:

 

The program controlled far-field radiation surface detection option chosen in the analysis settings could not find any surface that are a part of absorption element/surface, impedance/radiation boundaries or artificially matched layers interface. The post processor will not be able to evaluate far field results. 

So since you do not have any of those (absoprtion, radiation bc,..) it can not do that (far field calcs.) – what you have is a plate inside a room with rigid/hard walls – that is the natural bc in acoustics when no bc are defined on a face so can not look on far field outside a room with rigid walls :).

All the best

Erik

 

[castrohenrique0208]

Hello Erik. 

My problem is that when I try to apply any boundary (radiation/absorption), I get this error ?, when I select the corresponding body. 

 

Can you explain how I can measure the SPL in different locations? 

[Stefan Benca]