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Design of independent type B LNG fuel tank: a comparative study of finite element analysis and international guidelines

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Document pages: 14 pages

Abstract: In 2012, the International Maritime Organization (IMO) supervised Sox and NOx emissions through the establishment of emission control areas, and strengthened the supervision of ship construction and operation. Due to the strengthening of environmental protection regulations, the number of ships using liquefied natural gas has increased sharply. Therefore, it is necessary to systematically study the design of LNG fuel tank, one of the important components of LNG fuel supply system. In this study, for the B-type LNG fuel tank used in the actual structure, a structural integrity assessment procedure considering the international gas transportation company (IGC) specification is proposed. A 10000 TEU Container ship is selected as the operation ship, and an independent type B storage tank is selected as the LNG fuel tank. holyuctural integrity was evaluated by applying a systematic procedure based on the IGC Code. A series of finite element analysis was conducted under the various design loads and operating conditions. Fatigue life and fatigue damage were calculated using the numerical results obtained from transient thermal-structural analysis and fatigue analysis to provide the safety level of the design scheme.

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