Due to the restricted water depth of experimental facilities one has to rely more on computational tools for the design of turret and spread moored tanker based FPSOs in deep water. These tools have to be as accurate as possible. The mechanics to compute dynamically mooring lines and risers are understood. By means of potential theory the first order tanker motions and wave drift forces with and without current can be adequately computed nowadays, see for instance Ref. 1. Besides the low-frequency (lf) wave drift forces also the lf viscous reaction forces (damping) exist in still water and current. The if reaction forces/moment induced by the lf motions in the horizontal plane are mostly dominated by viscosity and hardly to compute.
展开▼
