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Wow, that's a lot to chew on, but I think it's starting to get at what I was asking.

I realize that the stress and reaction load values are meaningless, but my thought is that these can be scaled to some meaningful value. It seems like you could scale displacement and then apply that scale factor to other values. I am using ANSYS and the application is typically for small...

Does anyone have any experience with scaling modal results to get meaningful stress values for fatigue analysis? Right now, for vibration analysis I simply apply a static g-load and assume the load is fully reversed if no other pre-loads are present. I would like to add a little more fidelity...

I am using ANSYS and ANSYS WB. I am trying to develop a 'design level' tool so I would prefer to use WB. I know that WB has a point mass, but I do not understand how it is attached to the structure and how that will effect results.

Right now I'm not interested in the damping effect of the fluid, only the added mass without adding stiffness to the structure.

It normally would not be completely filled, but then again 'free surface' modes are not of interest. Also, at the frequencies I'm expecting (150-300 Hz), I'm thinking that the slosh modes would not have much effect?

Is anyone familiar with a nuts and bolts method for conducting FE modal analysis of a vessel or container filled with a fluid. I'm familiar with the fluid 80 element in classic ANSYS but I was hoping for more of a 'design level' approach for use in ANSYS WB. One method I've used in the past...