biw interior acoustic
biw interior acoustic
(OP)
Has anybody got any current industry experience of coupled acoustic modelling. I am interested in modal frequency response analysis. What sort of mesh density can give optimistic results on bothe structural and cavity.
thanks
thanks





RE: biw interior acoustic
(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.)
RE: biw interior acoustic
RE: biw interior acoustic
RE: biw interior acoustic
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.
RE: biw interior acoustic
RE: biw interior acoustic
for a better explanation, take a look at:
msc.nastan 2004 release guide
chapter 7 talks about how to use ACMODL
find it at mscsoftware.com
RE: biw interior acoustic
thanks for that. Did you use BW or CP option.