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A robust risk assessment methodology for safety analysis of marine structures under storm conditions

Abaei, MM, Arzaghi, E, Abbassi, R ORCID: 0000-0002-9230-6175, Garaniya, V ORCID: 0000-0002-0090-147X, Chai, S ORCID: 0000-0001-5186-4456 and Khan, FI ORCID: 0000-0002-5638-4299 2018 , 'A robust risk assessment methodology for safety analysis of marine structures under storm conditions' , Ocean Engineering: An International Journal of Research and Development, vol. 156 , pp. 167-178 , doi: 10.1016/j.oceaneng.2018.02.016.

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Abstract

Accidents involving vessels and/or offshore structures (henceforth referred to as marine structures) may pose high financial, environmental and fatality risk. To effectively manage these risks a methodical approach is required to model accident load and the stochastic behaviour of the marine structure that are arising from storm effects. This paper introduces a proactive framework that identifies and considers all the initial relevant risks. Compared to the conventional approaches that rely on precursor data for accident modelling, the developed methodology utilizes the critical stochastic variables directly from the hydrodynamic analysis of the floating structure. For this purpose, a novel numerical model is proposed to replicate a storm based on Endurance Wave Analysis (EWA) method. This approach reduces the computational cost (time and load) of the simulations. The critical stochastic variables are subsequently used in Bayesian Network (BN) to develop the risk model. The EWA and BN based integrated methodology assists in better understanding of accident causation and associated risk in changing operational conditions. The application of the methodology is demonstrated through a Floating Storage Unit (FSU) experiencing capsizing scenario.

Item Type: Article
Authors/Creators:Abaei, MM and Arzaghi, E and Abbassi, R and Garaniya, V and Chai, S and Khan, FI
Keywords: risk assessment, safety analysis, marine structures, harsh conditions
Journal or Publication Title: Ocean Engineering: An International Journal of Research and Development
Publisher: Pergamon-Elsevier Science Ltd
ISSN: 0029-8018
DOI / ID Number: 10.1016/j.oceaneng.2018.02.016
Copyright Information:

Copyright 2018 Elsevier Ltd.

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