유한요소법을 이용한 weathervane 선박의 계류강성 평가

Abstract

MOERI/KIOST developed a nonlinear time domain dynamic coupled solver for floating body and mooring system based on BEM and FEM. And, performance of a floating storage weathervane ship was evaluated using the solver. This paper investigates mooring stiffness of the weathervane ship in sway & yaw directions and analytically shows that system matrix of sway and yaw is singular at body center. The results are numerically confirmed by offset analysis using FEM.tes mooring stiffness of the weathervane ship in sway & yaw directions and analytically shows that system matrix of sway and yaw is singular at body center. The results are numerically confirmed by offset analysis using FEM.