Reliability based approach for offloading operation related to motion of two side-by-side moored LNG carriers |
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| Institution: | 1. School of Electric Power Engineering, South China University of Technology, Guangzhou, 510640, China;2. Department of Electrical Engineering and Electronics, The University of Liverpool, Liverpool, L69 3GJ, UK;1. School of Engineering, Newcastle University, Armstrong Building, Queen Victoria Road, Newcastle-upon-Tyne, NE1 7RU, UK;2. Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, Henry Dyer Building, 100 Montrose Street, Glasgow, G4 0LZ, UK;3. Pipeline Integrity Engineers Ltd., 262A Chillingham Road, Heaton, Newcastle-upon-Tyne, NE6 5LQ, UK;4. Formerly with DNV-GL, Holywell Park, Ashby Road, Loughborough, Leicestershire, LE11 3GR, UK;5. National Grid, 35 Homer Road, Solihull, West Midlands, B91 3QJ, UK;1. College of Engineering, Ocean University of China, Qingdao 266100, China;2. Shandong Province Key Laboratory of Ocean Engineering, Ocean University of China, Qingdao 266100, China;3. Powerchina Huadong Engineering Corporation Limited, Hangzhou 310014, China;1. Korea Research Institute of Ships & Ocean Engineering (KRISO), 1312-32 Yuseong-daero, Yuseong-Gu, Daejeon 34103, South Korea;2. University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, South Korea |
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| Abstract: | A reliability based approach for analysis of offloading operations with two identical LNG carriers moored in a side-by-side configuration is suggested. The approach, although adopted for two tankers, is generally applicable to different types of LNG terminals. Different heading controls are conceivable for the discharging vessel in the case that the heading is not fixed: heading toward wind-sea, heading toward swell, heading toward wind and free weather vaning. The analyses show that heading toward the governing sea state is the most beneficial option for two identical LNG carriers moored in a side-by-side configuration. Strategies are discussed for estimation of limiting weather criteria that are consistent with prescribed target failure probabilities. |
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| Keywords: | Closely spaced vessels Relative motion Mooring lines Reliability |
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