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Assessment of operational risks of LNG and FLNG vessels during manoeuvring in bad weather conditions

conference contribution
posted on 2023-05-23, 12:27 authored by Nagi AbdussamieNagi Abdussamie, Daboos, M, Shuhong ChaiShuhong Chai
In bad weather conditions, manoeuvring of a liquefied natural gas (LNG) carrier in open sea at floating LNG (FLNG) terminals can be associated with operational risks of potential consequences to human safety, environment and economy. Due to limited knowledge and experience with the FLNG technology, it is difficult to perform risk evaluations. Expert judgments are often employed to analyse and assess LNG risks using the risk matrix technique. However, human behaviour may influence the outcome of risk analyses resulting in an uncertain risk level. To deal with the uncertainty of expert opinions, two fuzzy set approaches are introduced in this paper. The first is a rule-based fuzzy model using Sugeno method for fuzzy inference. The second is a trapezoidal fuzzy set approach "simplified approach". Risk parameters were translated into a number of fuzzy sets, and a fuzzy risk value was calculated for several hazardous scenarios at different phases during ship berthing operations. The calculated fuzzy risk values were found to be consistent with the results of risk matrix technique.

History

Publication title

Proceedings of the 12th ISOPE Pacific-Asia Offshore Mechanics Symposium (PACOMS 2016)

Volume

2016

Editors

ISOPE

Pagination

289-296

ISSN

1946-004X

Department/School

Australian Maritime College

Publisher

International Society of Offshore and Polar Engineers

Place of publication

USA

Event title

12th Pacific-Asia Offshore Mechanics Symposium

Event Venue

Gold Coast, Australia

Date of Event (Start Date)

2016-10-04

Date of Event (End Date)

2016-10-07

Rights statement

Copyright 2016 International Society of Offshore and Polar Engineers

Repository Status

  • Restricted

Socio-economic Objectives

Natural hazards not elsewhere classified

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