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

The Society of Naval Architects of Korea (대한조선학회)
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Fatigue Strength Analysis of Pontoon Type VLFS Using Spectral Method

통계해석법에 의한 폰툰식 VLFS의 피로강도해석

  • Park, Seong-Whan (System Engineering Research Division, Horea Institute of Machinery & Materials) ;
  • Han, Jeong-Woo (System Engineering Research Division, Horea Institute of Machinery & Materials) ;
  • Han, Seung-Ho (System Engineering Research Division, Horea Institute of Machinery & Materials) ;
  • Ha, Tae-Bum (Research and Development Center, Korean Register of Shipping) ;
  • Lee, Hong-Gu (Research and Development Center, Korean Register of Shipping) ;
  • Hong, Sa-Young (Maritime and Ocean Engineering Research Institute (MOERI), KORDI) ;
  • Kim, Byoung-Wan (Maritime and Ocean Engineering Research Institute (MOERI), KORDI) ;
  • Kyoung, Jo-Hyun (Maritime and Ocean Engineering Research Institute (MOERI), KORDI)
  • 박성환 (한국기계연구원 시스템엔지니어링연구본부) ;
  • 한정우 (한국기계연구원 시스템엔지니어링연구본부) ;
  • 한승호 (한국기계연구원 시스템엔지니어링연구본부) ;
  • 하태범 (한국선급 기술연구소) ;
  • 이홍구 (한국선급 기술연구소) ;
  • 홍사영 (해양안전시스템연구소 해양시스템개발부) ;
  • 김병완 (해양안전시스템연구소 해양시스템개발부) ;
  • 경조현 (해양안전시스템연구소 해양시스템개발부)
  • Published : 2006.06.20
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Abstract

The fatigue strength analysis of VLFS is carried out by using a 3-dimensional plate finite element model with a zooming technology which performs the modeling of wide portions of the structure by a coarse mesh but the concerned parts by a very fine mesh of t by t level. And a stepwise substructure modeling technique for global loading conditions is applied which uses the motion response of the global structure from 2-D plate hydroelastic analysis as the enforcing nodal displacements of the concern 3-D structural zooming model. Seven incident wave angles and whole ranges of frequency domains of wave spectrum are considered. In order to consider the effect of breakwater, the modified JONSWAP wave spectrum is used. Applying the wave data of installation region, the longterm spectrum analysis is done based on stochastic process and the fatigue life of the structure is estimated. Finally some design considerations from the view point of fatigue strength analysis of VLFS are discussed.

Keywords

References

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