Abstract
In this study, the methods and results of numerical simulations to estimate the motion performance of a newly developed lightweight light buoy in waves and to check the effect of conceptually developed appendages on that performance were introduced. The results from a potential-based motion analysis with viscous damping coefficients obtained from free decay tests using computational fluid dynamics (CFD) and those obtained from wave motion simulation using CFD were compared. From these results, it was confirmed that viscous damping should be considered when the frequency of an incoming wave is close to the natural frequency of the buoy. It was estimated that the pitch and heave motions of the light buoy became smaller when the developed appendages were adopted. Although the quantitative superiority of the appendages was different, the qualitative superiority was similar between both results.
Highlights
IntroductionThe buoy guides vessels sailing nearby in the daytime with its shape and color, and at night with its light
The overset grid and dynamic fluid body interaction techniques were used to handle the motion of the floating body. 3-degree of freedom (DOF) and 6-DOF simulations were performed for the free decay tests and motion simulations in regular waves, respectively
With the application of the viscous damping coefficients, which were estimated by computational fluid (CFD) simulations, the motion analyses were performed using ANSYS-AQWA, which is based on panel methods
Summary
The buoy guides vessels sailing nearby in the daytime with its shape and color, and at night with its light. It guides vessels sailing nearby in the daytime with its shape and color, and at night with its light It plays a role in notifying vessels about the presence of obstacles such as reefs and shallows. Plays a role in notifying vessels about the presence of obstacles such as reefs and shallows. Because conventional large buoys are mainly made of steel, they are heavy and vulnerable to corrosion seawater. This makes the installation installation and and maintenance maintenance of of the the buoys buoysdifficult
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