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

The Society of Naval Architects of Korea (대한조선학회)
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3-Dimensional Underwater Explosion Shock Response Analysis of a Floating Structure considering Cavitation Effects

캐비테이션을 고려한 부유구조물의 3차원 수중폭발 충격응답 해석

  • 이상갑 (한국해양대학교 해양시스템공학부) ;
  • 권정일 (한국해양대학교 해양시스템공학부) ;
  • 정정훈 (한국기계연구원 구조연구부)
  • Published : 2003.12.01
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Abstract

For an accurate shock response analysis of a floating structure such as a naval surface ship subjected to an UNDEX(UNDerwater Explosion), the cavitation effects due to reflected wave at free surface and wetted structural surface should be considered. In this study, for the consideration of cavitation effects an effective method using LS-DYNA/USA and its theoretical background were presented. Through the application of the analysis of bulk cavitation phenomena in the free field, it could be confirmed that almost the same results were obtained between LS-DYNA/USA code and the analytical method. for the investigation of cavitation effects from the structural shock response characteristics, three dimensional UNDEX shock response analysis of an idealized ship model was also carried out It could be found that the cavitation Phenomena gave significant effects on the structural shock response characteristics, and especially that the shock loadings calculated at the installed location of shipboard equipment were underestimated in the case of no consideration of the cavitation effects, which might cause the severe mistake in its shock-resistance design.

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References

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