Abstract
The purpose of this paper is the study for the respondence of float structure of a point absorber for the wave periods.The goal is to find the method to optimize the float structure for the wave periods.First,the normalized kinetic energy for various float structures under regular wave conditions with various wave periods was compared by solving the movement equations with the numerical methods.The diameter 25 m structure in 6s wave period indicated the peak kinetic energy.Second,the normalized kinetic energy for various float structures was compared under irregular wave and regular wave with 6s wave period.The normalized kinetic energy in irregular wave was smaller than regular wave.