File(s) under permanent embargo
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 ChaiIn 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
2016Editors
ISOPEPagination
289-296ISSN
1946-004XDepartment/School
Australian Maritime CollegePublisher
International Society of Offshore and Polar EngineersPlace of publication
USAEvent title
12th Pacific-Asia Offshore Mechanics SymposiumEvent Venue
Gold Coast, AustraliaDate of Event (Start Date)
2016-10-04Date of Event (End Date)
2016-10-07Rights statement
Copyright 2016 International Society of Offshore and Polar EngineersRepository Status
- Restricted