Is it possible to perform Cathodic Protection calculations using Finite Element Analysis such as Opera?
You can use Opera’s static solver to perform current flow calculations, which are suitable for cathodic protection (CP) modelling on ships / submarines. CP systems inject current into the conducting sea-water / sea-bed (which do need to be included in the model in this case) to modify the electrochemical potential distribution that occurs because the ship is made from different metals and causes corrosion. The modified potential distribution then prevents (or at least reduces) corrosion.
Is it possible to analyse Ferromagnetic & Eddy Current Signatures in a Marine Environment using Opera? How will the modelling of the surrounding sea-water be taken into account?
With regard to ferromagnetic and eddy current signatures from ships and submarines, you need the static and dynamic electromagnetic modules of Opera-3d (with Modeller / Post) to do these calculations. A high frequency solver is not needed - in these type of calculations, the sea-water does not have any effect and can be treated as free-space. In defence applications, the signatures have to be minimized without reducing the effectiveness of any cathodic protection system. Opera’s static solver can help in this by modelling the ship and CP system to determine if (a) the CP system is effective (from the potential solution) and (b) the signatures are sufficiently low.