Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Study on Roll Motion Characteristics of a Rectangular Floating Structure in Regular Waves

규칙파 중 사각형 부유식 구조물의 횡동요 운동특성에 대한 연구

  • Kim, Min-Gyu (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Jung, Kwang-Hyo (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Park, Sung-Boo (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Lee, Gang-Nam (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Park, Il-Ryong (Department of Naval Architecture and Ocean Engineering, Dong-Eui University) ;
  • Suh, Sung-Bu (Department of Naval Architecture and Ocean Engineering, Dong-Eui University)
  • 김민규 (부산대학교 조선해양공학과) ;
  • 정광효 (부산대학교 조선해양공학과) ;
  • 박성부 (부산대학교 조선해양공학과) ;
  • 이강남 (부산대학교 조선해양공학과) ;
  • 박일룡 (동의대학교 조선해양공학과) ;
  • 서성부 (동의대학교 조선해양공학과)
  • Received : 2019.01.24
  • Accepted : 2019.04.11
  • Published : 2019.04.30
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Abstract

This study focused on the roll motion characteristics of a two-dimensional (2D) rectangular floating structure under regular beam sea conditions. An experiment was conducted in a 2D wave tank for a roll free decay test in calm water and the roll motion in a range of regular waves with and without heave motion to investigate the motion response and heave influence on the roll motion. A numerical study was carried out using Reynolds-averaged Navier Stokes (RANS)-based CFD simulations. A grid convergence test was conducted to accurately capture the wave condition on the free surface based on the overset mesh and wave forcing method. It was found in the roll free decay test that the numerical results agreed well with the experimental results for the natural roll period and roll damping coefficient. It was also observed that the heave motion had an impact on the roll motion, and the responses of the heave and roll motion from the CFD simulations were in reasonable agreement with those from the experiment.

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References

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