Modal Analysis ofoil sump with oil

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

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

Tagged:

Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2016

    Hi Alex,

     

    Refer to the below post:

     

     

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2016

    FYI,

     

    The coupled frequencies maybe get output with the coming version of OptiStruct.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2016

    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.....

Categories