유한요소법을 이용한 시간영역에서의 유탄성응답 해석기법

Abstract

Finite element method is applied to hydroelastic response of Very Large Floating Structure in time domain. A three-dimensional free surface flow problem is formulated in the scope of potential flow theory with fully nonlinear free surface conditions. To describe the motion of VLFS the Mindlin plate modeling is adopted. The equation of plate motion is descritized by finite element method using virtual work principle and solved by Newmark method. The fluid domain is also analyzed by finite element method based on Hamilton's principle. To consider the fluid structure interaction, the nonlinear problem is numerically solved through an iterative method at each time step.