渦励起運動に対する浮体形状およびカラム配置の影響

抄録

Vortex-Induced Motion (VIM) of a floating body is the result of the exciting force by vortex shedding on the hull of a bluff body. VIM motions result in additional oscillating mooring line tensions and fatigue loading. In this paper, it was observed how the behavior of VIM changes due to changing the shape of a floating body in Lattice Boltzmann Method. In terms of the oscillatory displacement, square column is with least influence of VIM. As a result of using four columns in square configuration, there is not a proportional relationship between gap of columns and oscillatory displacement. Additionally, it was examined how vortexes occurred from upstream columns affect downstream columns.