Comparative study of wave-induced motion for two types of floating pendulum wave energy converters

Abstract

We comparatively investigated wave-induced motions for two floating pendulum wave energy converters (WECs): one, designed to reduce motion response via a damping plate, and another, to reduce motion response via a large water-plane area. Motion responses were compared through model tests under operational and survival wave conditions and numerically analyzed through a higher-order boundary element method(HOBEM) using the wave Green function. From experimental and numerical data, 6-DOF motion responses were compared under survival conditions. The WEC efficiency was estimated from relative angular motions of the pendulum. An optimal WEC design was proposed in consideration of seakeeping performance and efficiency.tion responses were compared through model tests under operational and survival wave conditions and numerically analyzed through a higher-order boundary element method(HOBEM) using the wave Green function. From experimental and numerical data, 6-DOF motion responses were compared under survival conditions. The WEC efficiency was estimated from relative angular motions of the pendulum. An optimal WEC design was proposed in consideration of seakeeping performance and efficiency.