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Application of surf-riding and broaching mode based on IMO second-generation intact stability criteria for previous ships

  • Shin, Dong Min (Institute for Security Convergence Research, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Moon, Byung Young (Department of Shipbuilding and Ocean Engineering, Kunsan National University) ;
  • Chung, Jaeho (Institute for Security Convergence Research, Korea Advanced Institute of Science and Technology (KAIST))
  • Received : 2021.01.18
  • Accepted : 2021.07.01
  • Published : 2021.11.30

Abstract

International Maritime Organization (IMO) have recently discussed the technical problems related to the second-generation intact stability criteria of ships. The second-generation intact stability criteria refer to five modes of vulnerability when the ship sailing in the ocean. In this study, we described a method to verify the criteria of the surf-riding/broaching. In case that Lv1 (Level 1) vulnerability criteria is not satisfied based on the relatively simple calculation using the Froude number (Fn), we presented the calculation procedure for the Lv2 (Level 2) criteria considering the hydrodynamics in waves. The results were reviewed based on the data for given previous ships. In absence of ship-specific data, a similar Lv2 result was confirmed by comparing the result obtained by calculating the added mass with the case where the added mass was 10% of the ship mass. This result will contribute to basic ship design process according to the IMO draft regulation.

Keywords

Acknowledgement

This research was a part of the project titled Development of Verification Technology of the IMO 2nd Generation Stability Criteria for improving ship Safety, funded by the Ministry of Oceans and Fisheries, Korea (20180318).

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