Calculating the forces of my boat against a float in weather

[deanlofall]

I am looking for some help. I do not have a background in
hydrodynamics or naval architecture.

I have a need to calculate the potential forces my 32' boat will
excert against a floating dock in various sea conditions. My goal is
to determine if the (float/piling) structure is sufficient to handle
the size of my boat. I have determined the range of expected wave
amplitudes / periods for my location. I am in the process of working
out the pile lateral load capacity and deflection at the ground
surface, as well as the float attachment strength.

The key piece of information that I need is the force potential of my
boat in various sea states. I want to assume worst case, which I
understand would be the sway of the hull resulting from waves in the
direction abeam of the the boat. If I can determine the boat's
acceleration caused by waves in the direction towards the float, then
I can determine the potential force applied to the dock.

I would like to know, do any of you know where I can get access to
software that can provide this information with the entry of the
characteristics of my boat (LWL, draft, keel profile, displacement..
etc)? I know this software exists, but what I have found is
expensive. I am not designing ships, I just need it to solve my
problem. Is there any free or nearly free software out there that can
do this for me?

Thank you,

Dean