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Numerical simulation of Sewol ferry capsize

Authors
Kim, YonghwanSeo, Min-GukLee, Jae-Hoon
Issue Date
2월-2019
Publisher
SAGE PUBLICATIONS LTD
Keywords
Sewol ferry; ship capsize; ship stability; ferry accident; marine safety; ship maneuvering
Citation
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART M-JOURNAL OF ENGINEERING FOR THE MARITIME ENVIRONMENT, v.233, no.1, pp 186 - 208
Pages
23
Journal Title
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART M-JOURNAL OF ENGINEERING FOR THE MARITIME ENVIRONMENT
Volume
233
Number
1
Start Page
186
End Page
208
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8363
DOI
10.1177/1475090217729045
ISSN
1475-0902
2041-3084
Abstract
In this study, numerical simulations are conducted in order to analyze the capsizing of roll-on/roll-off passenger ship, Sewol, which occurred on 16 April 2014. Since little is known about the reason of ship capsize, numerical simulation aims to the finding of possible scenarios which can cause this tragic accident. To this end, 4-degree-of-freedom (surge, sway, yaw, and roll motions) maneuvering equations are solved. The hydrodynamic coefficients obtained from a similar ship are applied and the WISH-Maneuver program of Seoul National University is used to perform the numerical simulation. The present analysis utilizes the probabilistic approach, which considers various physical variables and involves the simulation of a large number of cases using different combinations of the variables. The total number of simulation cases is over 70 millions, and the simulation results that are close to the conditions of the actual accident situation are selected. Through this process, the effects of the simulation variables are investigated and the potential causes of the accident are identified. The results show the hydrostatic instability of the ship in the operational condition owing to cargo overload and insufficient ballast water, which raised the vertical center of gravity. The reduced stability combined with large starboard steering angle and cargo movement during large heel may have been the decisive reason of capsizing.
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친환경해양개발연구본부 (심해공학연구센터)
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