STRUCTURAL ANALYSIS OF LNG VESSELS IN A SEAWAY
摘要
The advent of the liquefied natural gas (LNG) carrier has necessitated a great understanding of a vessel's operating environment in order to effectuate the design of a sound, optimum, cost-effective structure. The exotic, complex containment systems required to carry the cyrogenic cargo in liquefied form at a temperature of -260 F, and the somewhat unusual and large hull proportions, call for technological expertise and innovative methods on the part of both the designer and classification society. It is the purpose of this paper to describe an analytical approach to the structural analysis of LNG vessels under the effects of static and dynamic loadings. A system of computer programs is utilized to statistically predict a vessel's dynamic response in a seaway, the results of which are in turn input to the DAISY finite element computer program for structural analysis. The efficacy of the analytical procedure is illustrated by investigating two different types of tank containment systems in large LNG vessels.