eigenfrequency study wineglass model (water-glass boundary condition)

Hello,

I am studying how the eigenfrequencies of a wineglass change when you add differents amounts of water to the glass.

I can easily model it when the glass is empty (without any water) and get the results. But, I am not sure how I can do it when some amount of water is added what boundary conditions, etc should I add.

I use the livelink for solidworks "plugin" to get the geometries from the solidworks, where I have the wineglass and the water geometry. But then I am not sure how to procede.

When the glass is empty I simply used the Solid Mechanics (solid) Physics and constrained the foot of the wineglass. When I add the water what Physics should I use? Fluid structure interaction? and if so, what "settings" should I be aware of?

I tried before with the FSI but when solving I got a error at the calculation (in the picture).

Thank you in advance for the help.