Interaction of waves and a porous tension leg platform with an impermeable top layer

An analytical solution has been developed here to quantify the flow field and the surge motion of a porous tension leg platform induced by linear waves. The porous layer of the TLP is considered to be anisotropic but homogeneous. The nonlinear form drag in the porous layer is replaced by a linear drag according to Lorentz's hypothesis of equivalent work. The convergence of the series solution is verified. The dependence of the flow field and the surge motion ofthe platform, as well as its resonant frequency, on wave and structure properties has been studied.