강성분포의 변화가 초대형 부유식 구조물의 유탄성응답에 미치는 영향 고찰

Abstract

Influences of stiffness distributions on hydroelastic responses of very large floating structures (VLFS) are studied in this paper. Since VLFS considered in this paper is a very large plate structure, hydroelastic model considering flexibility is valid instead of rigid body model in numerical analysis. The effect of hydrostatic stiffness, added mass and hydro-radiation damping due to fluid flow is also included in the analysis. Hydroelastic responses are calculated by direct method employing higher-order boundary element method (HOBEM) for fluid analysis and finite element method (FEM) for structure analysis. In structural analysis using FEM, Mindlin plate elements are used. An 1 km-long VLFS with uniform stiffness and modified VLFS with varying stiffness distributions are considered in numerical analysis.