Hydroelastic Analysis of Pontoon Type VLFS Considering the Location and Shape of OWC Chamber

J. Ocean Eng. Technol. 2008;22(1):22-29.

Hong Sa-Young,Kyoung Jo-Hyun,Kim Byoung-Wan

Offshore Plant Research Division MOERI/KORDI,Offshore Plant Research Division MOERI/KORDI,Offshore Plant Research Division MOERI/KORDI

공기챔버 위치에 따른 폰툰형 초대형 구조물 유탄성응답 해석

홍사영,경조현,김병완

한국해양연구원 해양시스템안전연구소,한국해양연구원 해양시스템안전연구소,한국해양연구원 해양시스템안전연구소

Keywords: Hydroelastic analysis, OWC chamber, Finite element method, Mode superposition method, Pontoon-type VLFS

핵심용어: 유탄성해석, 진동주수 공기챔버, 유한요소법, 모드중첩법, 폰툰형 초대형 구조물

Abstract

A numerical investigation is made on the effects of the location and shape of the front wall of an OWC(Oscillating Water Column) chamber on the hydroelastic response of a VLFS. Most of the studies on the effects of an OWC chamber on the response of a VLFS have assumed the location of the OWC chamber to be at the front of the VLFS. In the present study, an OWC-chamber is introduced at an arbitrary position in relation to a VLFS to determine the influence of the location and shape of the OWC chamber on the hydroelastic response of the VLFS. A finite element method is adopted as a numerical scheme for the fluid domain. or the finite element method, combined with a mode superposition method, is applied in order to consider the change of mass and stiffness The OWC chamber in a piecewise constant manner. or the facilitated anefficient analysis of The hydroelastic response of the VLFS, as well as the easy modeling of different shape and material properties for the structure. Reduction of hydroelastic response of the VLFS is investigated for various locations and front wall shapes of the owe chamber.