Computation of wave drift forces on floating axisymmetric bodies in regular waves

An efficient numerical procedure is described for computing the mean second order wave drift forces on floating axisymmetric bodies in regular waves. It is based on boundary integral and hybrid finite element techniques in potential flow theory. Both far field and near field formulations are employed to derive the expressions for the mean wave drift forces. The axisymmetry of the body geometry is exploited to reduce the computational effort involved. Results based on the present numerical procedure are then compared with the analytical solutions for an articulated circular cylinder and a floating hemisphere. The computational results give close agreement with the analytical ones, thus confirming the validity and accuracy of the present formulation.