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http://dx.doi.org/10.7837/kosomes.2022.28.4.594

Calculating the Mooring Force of a Large LNG Ship based on OCIMF Mooring Equipment Guidelines  

Wang, Jian (Department of Naval Architecture and Ocean Engineering, Kunsan National University)
Noh, Jackyou (Department of Naval Architecture and Ocean Engineering, Kunsan National University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.28, no.4, 2022 , pp. 594-600 More about this Journal
Abstract
When a large liquefied natural gas (LNG) carrier is anchored at a coastal terminal, calculations on mooring forces of mooring cables induced by environmental loads such as strong winds and currents are needed to secure mooring safety. The advantages and disadvantages of several existing mooring force calculation methods are compared and analyzed with their application conditions. Resultingly, mooring equipment guidelines of the Oil Companies International Marine Forum (OCIMF) are chosen as the computational method for this study. In this paper, the mooring forces of a large LNG carrier with spectrum was calculated using the OCIMF mooring equipment guidelines. The calculation shows similar maximum forces resulted from the calculation using experiment data of a wind tunnel test. To verify the results, OPTIMOOR, a dedicated mooring force calculation software, is used to calculate the same mooring conditions. The results of both calculations show that the computational method recommended by OCIMF is safe and reliable. OPTIMOOR calculates more detailed tensile force of each mooring cable. Thus, the calculation on mooring forces of mooring cables of a large LNG carrier using OCIMF mooring equipment guidelines is verified as an applicable and safe method.
Keywords
Mooring force; LNG carrier; OCIMF; Mooring equipment guidelines; Wind tunnel test; OPTIMOOR;
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