Abstract
An axisymmetric two-body wave energy converter is studied here. Previous results show that the cross couple terms of the added mass and damping can be neglected when the distance between the two buoys is far enough. A linear dynamic model of this two-body system is established and analyzed based on linear wave theory. The optimal power takeoff stiffness and damping were obtained. The numerical results show that large bottom body will result in a large output power. However, it is also constrained by the power takeoff stiffness. The viscous damping will always have bad influence on energy harvesting. The performance of a two-body point in irregular wave was also investigated.
