Numerical Analysis of Wave-induced Motion of Floating Pendulor Wave Energy Converter

doi:2011.25.4.28

J. Ocean Eng. Technol. > Volume 25(4); 2011 > Article

J. Ocean Eng. Technol. 2011;25(4):28-35.
DOI: https://doi.org/10.5574/KSOE.2011.25.4.028

Nam Bo-Woo,Hong Sa-Young,Kim Ki-Bum,Park Ji-Yong,Shin Seung-Ho

Marine Stucture & Plant Research Department KORDI,Marine Stucture & Plant Research Department KORDI,Chungnam National University,Marine Stucture & Plant Research Department KORDI,Marine Stucture & Plant Research Department KORDI

부유식 진자형 파력발전 장치의 파랑운동 수치해석

남보우,홍사영,김기범,박지용,신승호

한국해양연구원 해양구조물.플랜트연구부,한국해양연구원 해양구조물.플랜트연구부,충남대학교 선박해양공학과,한국해양연구원 해양구조물.플랜트연구부,한국해양연구원 해양구조물.플랜트연구부

Keywords: Floating pendulor, Wave energy converter, Wave-induced motion, Higher-order boundary element method(HOBEM), Coupling analysis

핵심용어: 부유식 진자형 장치, 파력에너지 변환 장치, 파랑운동, 고차경계요소법, 연성해석

Abstract

In this paper, the wave-induced motion characteristics of a floating pendulor are investigated numerically. A floating pendulor is a movable-body-type wave energy converter. This device consists of three main parts (floater, pendulum, and damping plates). In order to obtain the hydrodynamic coefficients and wave exciting forces acting on floating bodies, a higher-order boundary element method (HOBEM) using a wave Green function is applied to the present problems. The hinged motion of a pendulum is simulated by applying the penalty method. In order to obtain a more realistic motion response for a pendulor, numerical body damping is included. First, the wave force and motion characteristics of just a floater are observed with respect to different shape parameters. Then, a coupled analysis of a floater, pendulum, and damping plates is carried out. The relative pitch velocity and wave forces acting on the floating pendulor are compared with those of a fixed pendulor.