Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Experimental Study on Free Roll Decay Motions of a Damaged Ship for CFD Validation Database

CFD 검증용 데이터베이스 구축을 위한 손상 선박의 횡동요 감쇠 운동에 대한 실험적 연구

  • Lee, Sung-Kyun (Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • You, Ji-Myoung (Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Lee, Hyun-Ho (Hyundai Maritime Research Institute, Hyundai Heavy Industries Co., Ltd.) ;
  • Rhee, Shin-Hyung (Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Rhee, Key-Pyo (Department of Naval Architecture and Ocean Engineering, Seoul National University)
  • 이성균 (서울대학교 조선해양공학과) ;
  • 유지명 (서울대학교 조선해양공학과) ;
  • 이현호 (현대중공업(주) 선박해양연구소) ;
  • 이신형 (서울대학교 조선해양공학과) ;
  • 이기표 (서울대학교 조선해양공학과)
  • Received : 2011.07.11
  • Accepted : 2011.12.23
  • Published : 2012.02.20
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Abstract

Among many factors to be considered for higher safety level requirements, the hull stability in intact and damaged conditions in seaways is of utmost importance. Since the assessment of a damaged ship is complicated due to the highly non-linear behavior, it is widely acknowledged that computational fluid dynamics (CFD) methods are one of the most feasible approaches. Although many research activities are being reported on the damaged ship stability recently, most of them are not designed for validation of CFD studies. In this study, well-designed model tests were performed to build a CFD validation database, which is essential in developing better CFD methods for the damage stability assessment. The geometry of the damaged compartment and test conditions were determined based on preliminary CFD simulations. Free roll decay tests in calm water with both intact and damaged ships were performed and the roll motion characteristics were compared. The damaged ship showed a larger roll damping coefficient and more rapid decrease of roll amplitude than the intact ship. The primary reason of these efforts can be explained by the movement of the flooded water.

Keywords

References

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