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Acoustic simulation : CAABSF/PAASF assignment

Hello,

I have modelled air around the housing. These structural and fluids are coupled by ACMODL Card. I want to define non-reflecting boundary. for that I have defined PAABSF and referenced to CAABSF. But I dont know how to assign CAABSF to Elements.

Thanks in advance.

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Rahul Rajan_21763

The CAABSF element must connect entirely to fluid points on the fluid-structure boundary. Card edit option would help you to assign CAABSF eleements

<?xml version="1.0" encoding="UTF-8"?>

Vikrant

Thanks Rahul for your Reply.

But I get some different options.

<?xml version="1.0" encoding="UTF-8"?>

Rahul Rajan_21763

set type of element config as quad4 then second option contain will give CAABSF.

Vikrant

Okay, I found it Rahul.
Thanks a lot.

Vikrant

Okay, I found it Rahul.
Thanks a lot.

Instead applying only on the fluid structure boundary, I have kept elem type as a CAABSF on all fluid Elements.
Is that fine?

Vikrant

Hi, Rahul,

I am done with modelling of the fluid structural coupling Problem.
I have attached file. could you please check it once.

Bauteil1,2 and platte - structural components
Air - fluid (At the end non reflecting boundary)

Please check if PAABSF and CAABSF are correctly defined or not.

Thanks a lot.

Regards,

Vikrant

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