The user manuals for WAMIT and NEMOH are not quite clear, at least to my understanding. Is there any article/chapter/video description or web link, explaining the calculation of hydrodynamic coefficients including; Impulse Response Function (IRF) of the radiation force, damping coefficient, added mass etc. in context of wave energy conversion systems?
Copious of literature is using these, but rarely anyone gives detailed insight to it.
From the theoretical side, you may need to refer to Marine Hydrodynamics by J.N. Newman, Sea loads on ship and offshore structures by O.M. Faltinsen for details on the explanation of hydrodynamic coefficient. The calculation of IRF can be found in many papers.
If you are asking how to use Nemoh or WAMIT to model a WEC system, the answer is they cannot be directly applied for WEC simulation. You must establish your hydrodynamic model in these code, and build up you own WEC model in other place.
The WAMIT manual has very rich explanantions on both theoretical introduction and how to use it. Also, there are plenty of examples. I would disagree with you that the manual is not clear. I would suggest you to take some time to read the manual.
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