Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Motion Simulation of FPSO in Waves through Numerical Sensitivity Analysis

수치 민감도 해석을 통한 파랑중 FPSO운동 시뮬레이션

  • Kim, Je-in (Department of Naval Architecture and Ocean Engineering, Dong-Eui 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) ;
  • Kang, Yong-Duck (Department of Naval Architecture and Ocean Engineering, Dong-Eui University) ;
  • Hong, Sa-Young (Korea Ocean Research & Development Institute, Korea research Institute of Ship & Ocean Engineering) ;
  • Nam, Bo-Woo (Korea Ocean Research & Development Institute, Korea research Institute of Ship & Ocean Engineering)
  • 김제인 (동의대학교 조선해양공학과) ;
  • 박일룡 (동의대학교 조선해양공학과) ;
  • 서성부 (동의대학교 조선해양공학과) ;
  • 강용덕 (동의대학교 조선해양공학과) ;
  • 홍사영 (선박해양플랜트 연구소) ;
  • 남보우 (선박해양플랜트 연구소)
  • Received : 2018.03.22
  • Accepted : 2018.06.07
  • Published : 2018.06.30
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Abstract

This paper presents a numerical sensitivity analysis for the simulation of the motion performance of an offshore structure in waves using computational fluid dynamics (CFD). Starting with 2D wave simulations with varying numerical parameters such as grid spacing and CFL value, proper numerical conditions were found for accurate wave propagation that avoids numerical diffusion problems. These results were mapped on 2D error distributions of wave amplitude and wave length against the numbers of grids per wave length and per wave height under a given CFL condition. Finally, the 2D numerical sensitivity result was validated through CFD simulation of the motion of a FPSO in waves showing good accuracy in motion RAOs compared with existing potential flow solutions.

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References

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