Modal Analysis ofoil sump with oil


Hello
I am trying to setup a simple model of an oil sump full of oil to test a coupled fluid/structure modal analysis.
I am not interested in simplified MFLUID method, but in an Fully coupled acoustic analysis method. I set both EIGRL modal analysis extractions method for fluid and structure as suggested in 'ALTAIR tutorial about Half car Acoustic response'.
I get 2 separate modal frequency for fluid and structure, but I am not able to see Structure-Fluid coupled modal frequencies.
It looks like as if a simple coupled analysis is running and not a fully coupled one.
Any suggestion?
Alex
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FYI,
The coupled frequencies maybe get output with the coming version of OptiStruct.


Thank you for support.
Any way it seems really odd because if it is possible to run a Modal frequency response analysis this mean that a coupled modal base should be present....
We will looking for the new version of Optistruct.....
Hi Alex,
Refer to the below post: