Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Experimental Study on Estimation of Roll Damping for Various Midship Sections

중앙 단면 형상에 따른 횡동요 감쇠 추정 실험 연구

  • Park, Byeongwon (Korea Research Institute of Ships and Ocean Engineering) ;
  • Jung, Dong Woo (Korea Research Institute of Ships and Ocean Engineering) ;
  • Jung, Jaesag (Korea Research Institute of Ships and Ocean Engineering) ;
  • Park, Inbo (Korea Research Institute of Ships and Ocean Engineering) ;
  • Cho, Seok-Kyu (Korea Research Institute of Ships and Ocean Engineering) ;
  • Sung, Hong Gun (Korea Research Institute of Ships and Ocean Engineering)
  • 박병원 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 정동우 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 정재상 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 박인보 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 조석규 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 성홍근 (한국해양과학기술원 부설 선박해양플랜트연구소)
  • Received : 2019.01.09
  • Accepted : 2019.08.12
  • Published : 2019.08.31
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Abstract

The magnitude of the roll motion of a floating structure depends on the roll damping acting on the body. In other words, the roll damping of a floating structure must be accurately obtained in order to precisely evaluate the roll motion. Various methods are used to evaluate the roll damping of a floating structure, such as the linear potential theory, computational fluid dynamics (CFD), and model tests. However, it is difficult to evaluate the roll motion of a floating structure with appendages such as a bilge keel and riser slot due to the limitation of ignoring the viscous effects in the linear potential theory. Among these methods, a model test based on a free decay test and harmonic excited roll motion (HERM) is known to be the most reliable method to estimate the roll damping of the floating structures. In this study, model tests using free decay and HERM techniques were performed in the Ocean Engineering Basin (OEB) of KRISO with various types of midship sections. The roll damping results were estimated based on post-processing methods using both techniques, and the roll damping results were compared.

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References

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