Trial application of FE simulation on ships collision within the risk assessment on oil spills from oil tankers

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Risk assessment methodologies have been widely used in the maritime industry. Formal Safety Assessment (FSA), a rule-making tool developed by the IMO in which risk assessment plays an important role, is coming to be used to an ever-greater extent by classification societies in the development of their ship classification rules. The maritime world is, unfortunately, confronted with an overabundance of casualty data, and many people may make estimates of risk based on such statistical data. However, regulations in international Conventions such as SOLAS and MARPOL as well as classification rules have been continuously amended based on such data with the aim of preventing a recurrence of such casualties. Inherent in this approach is a concern that older data might not fully reflect the present risks of ships under consideration. Therefore, the usage of suitable theoretical and engineering tools should be encouraged to fill the gaps between the past and future. In this context, the authors carried out risk assessment of oil tankers analyzing historical data of oil spills and conducted FEM simulations using LS-DYNA in order to estimate the consequence of the anticipated worst scenario in which a typical VLCC collides with an oil tanker of the same size. Consequently, the authors confirmed the effectiveness of well-known risk control options such as early implementation of compulsory double hull construction designs and/or stochastic assessment of possible oil spills specified in MARPOL. It was also confirmed that such FEM simulations would be a powerful tool in predicting the collision damage to analyse oil spill risk.

Trial application of FE simulation on ships collision within the risk assessment on oil spills from oil tankers

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