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biw interior acoustic
- Thread starter zerodof
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I have been working on similar things for about a year now. One thing I want to point out; I understand that you want to fill and couple the air with the BIW structure. I use akusmod (msc software) to generate air. However, you should need a trim body model in which no openings are available and then the air is generated (depending on the mesh size) into the interior cavity of the vehicle
(structure).For a BIW model I never experimented manual air generation but still I see that you need some kind of constraint on the openings (ex. doors , etc.)
(structure).For a BIW model I never experimented manual air generation but still I see that you need some kind of constraint on the openings (ex. doors , etc.)
- Thread starter
- #3
Hi zerodof,
I was looking at the ACMODL, I did not use it before as our nastran decks are slightly different and as we are using AKUSMOD. I am not sure if you have the any kind of guide, but I am using quick reference quide and the format is as follows,
1 2 3 4 5 6
12345678123456781234567812345678123456781234567812345678
ACMODL INTER INFOR FSET SSET FSTOL
I would try INTER=DIFF (If only one side of the structure interacts with the fluid) , INFOR=ALL, FSET and SSET id numbers and some FSTOL value which is 0.001 if left blank.
In the deck you will have SET1=(id of fluid points) and SET2=(id of structure points).
Lets see if it works.
I was looking at the ACMODL, I did not use it before as our nastran decks are slightly different and as we are using AKUSMOD. I am not sure if you have the any kind of guide, but I am using quick reference quide and the format is as follows,
1 2 3 4 5 6
12345678123456781234567812345678123456781234567812345678
ACMODL INTER INFOR FSET SSET FSTOL
I would try INTER=DIFF (If only one side of the structure interacts with the fluid) , INFOR=ALL, FSET and SSET id numbers and some FSTOL value which is 0.001 if left blank.
In the deck you will have SET1=(id of fluid points) and SET2=(id of structure points).
Lets see if it works.
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