Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Fatigue Assessment of Very Large Container Ships Considering Springing Effect Based on Stochastic Approach

  • Jung, Byoung-Hoon (Maritime Research Institute, Hyundai Heavy Industry) ;
  • Ahn, In-Gyu (Maritime Research Institute, Hyundai Heavy Industry) ;
  • Seo, Sun-Kee (Hull Rule Development Team, Korean Register of Shipping) ;
  • Kim, Beom-Il (Ship and Offshore Technology Center, Korean Register of Shipping)
  • Received : 2020.02.22
  • Accepted : 2020.04.09
  • Published : 2020.04.30
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Abstract

Evaluation of fatigue strength considering the springing effect of very large container ships is crucial in the design stage. In this study, we established a fatigue strength evaluation method considering a linear springing component in the frequency domain. Based on a three-dimensional global model, a fluid-structure interaction analysis was performed and the modal superposition method was applied to determine the hot spot stress at the hatch corner of very large container ships. Fatigue damage was directly estimated using the stress transfer function with a linear springing response. Furthermore, we proposed a new methodology to apply the springing effect to fatigue damage using hull girder loads. Subsequently, we estimated the fatigue damage contribution due to linear springing components along the ship length. Finally, we discussed the practical application of the proposed methods.

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References

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