Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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An Analysis of Rolling Performance for a Barge-Type FPSO

바아지형 FPSO의 횡운동 성능에 대한 해석

  • Choi, Yoon-Rak (School of Transportation Systems Engineering, University of Ulsan) ;
  • Kim, Jin-Ha (Korea Research Institute of Ships and Ocean Engineering, KORDI) ;
  • Kim, Young-Su (Ship and Ocean R&D Institute, Daewoo Shipbuilding & Marine Engineering Co. Ltd.)
  • 최윤락 (울산대학교 조선해양공학부) ;
  • 김진하 (한국해양연구원 해양시스템안전연구소) ;
  • 김용수 (대우조선해양(주) 선박해양기술연구소)
  • Published : 2005.06.30
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Abstract

To predict rolling performance for a barge-type FPSO, the evaluation of correct nonlinear roll damping is critical. The square section of FPSO causes a considerable viscous damping effect. Free roll decay tests were carried out to estimate nonlinear roll damping for a barge-type FPSO, under three different conditions. The roll motion RAO was deduced from model tests in the wave condition of the wideband spectrum. In numerical calculation, the quadratic damping was considered as equivalent linear damping, using the results of free roll decay test. Tested roll performance in the JONSWAP wave spectrum was compared with numerical results. These two results shaw good agreement, in spite of the proximity of peak wave period and roll natural period.

Keywords

References

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