Beam excited by a shaker

Hi All,

I aim to model a simple beam excited by a shaker. I am using the Solid Mechanics.
I would like to know how big is the displacement of a particular mode (eg first flexural) when I excite the beam in resonance.

I found the eigenfrequencies using the study step EIGENFREQUENCY. Let's talk about just one of them, eg 100Hz

now I would like to excite the beam with this frequency I have just found. How to do that?

What I tried to do was to use the study step FREQUENCY DOMAIN choosing the frequencies 100Hz and to compute it.

I have this error:

Failed to find a solution.
The relative residual (0.25) is greater than the relative tolerance (0.001).
Returned solution is not converged.

I can imagine it is for the reason that using a stationary solver, without damping, at resonance it can't converge. but, in this case, how can I do? Is it wrong to use he stationary? What abut the frequency dmain as study step rather than FREQUENCY DOMAIN MODAL?

Thanks in advance

Fabrizio