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

The Society of Naval Architects of Korea (대한조선학회)
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Residual Longitudinal Strength of a VLCC Considering Probabilistic Damage Extents

확률론적 손상을 고려한 VLCC 잔류 종강도 평가

  • Nam, Ji-Myung (Department Naval Architecture and Ocean Engineering Inha University) ;
  • Choung, Joon-Mo (Department Naval Architecture and Ocean Engineering Inha University) ;
  • Park, Ro-Sik (Department Naval Architecture and Ocean Engineering University of Ulsan)
  • 남지명 (인하대학교 조선해양공학과) ;
  • 정준모 (인하대학교 조선해양공학과) ;
  • 박노식 (울산대학교 조선해양공학과)
  • Received : 2011.10.10
  • Accepted : 2012.01.31
  • Published : 2012.04.20
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Abstract

This paper provides prediction of ultimate longitudinal strengths of hull girder of a VLCC considering probabilistic damage extents due to collision and grounding accidents based on IMO Guideline(2003). The probability density functions of damage extents are expressed as a function of nondimensional damage variables. The accumulated probability levels of 10%, 30%, 50%, and 70% are taken into account for the damage extent estimation. The ultimate strengths have been calculated using in-house software UMADS (Ultimate Moment Analysis of Damaged Ships) which is based on the progressive collapse method. Damage indices are provided for all heeling angles due to any possible flooding of compartments from $0^{\circ}$ to $180^{\circ}$ which represent from sagging to hogging conditions, respectively. The analysis results reveal that minimum damage indices show different values according to heeling angles and damage levels.

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