International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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A study on prediction of whipping effect of very large container ship considering multiple sea states

  • Kim, Beomil (Ship and Offshore Technology Center, Korean Register) ;
  • Choung, Joonmo (Department of Naval Architecture and Ocean Engineering, INHA University)
  • Received : 2019.08.07
  • Accepted : 2020.04.19
  • Published : 2020.12.31
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Abstract

In the design stage of the very large container ships, some methodologies for the whipping effects have been developed, but most of them are based on single sea state. We developed a methodology that considers multiple sea states. Fluid-structure Interaction (FSI) analyses with one dimensional structural model were carried out to capture slamming-induced transient whipping behaviors. Because of the nature of random phases of the applied wave spectra, the required period for entire FSI analyses was determined from the convergence study where the whipping effect became stable. Low pass filtering was applied to the transient whipping responses to obtain the hull girder bending moment processes. Peak counting method for the filtered whipping responses was used to obtain collection of the vertical bending moment peaks. The whipping effect from this new method is compared with that from based on single sea state approach. The efficiency and advantage of the new methodology are presented.

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References

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