Hi @duraisamy, @jousefm,
I think there might be a slight misunderstanding. I guess @duraisamy you want to conduct a vibro-acoustic analysis, meaning
- coupling of solid and fluid domains
- harmonic frequency analysis instead of Eigenmode analysis
Currently we only support acoustic modal analysis of the acoustic medium with hard walls. In the example of the car interior, this means there is no influence of the seat material whatsoever, it is assumed to be acoustically rigid (infinite acoustic impedance). Additionally there is no solid region that might vibrate, only the interior air volume is considered.
So, if you need to solve vibro-acoustic problems, the current acoustic modal analysis on SimScale is probably not the right tool.