Evaluation of the pressure-resistance of the intersection of a Membrane-type primary barrier: part 1 experimental study
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초록
With the recent trend towards large-sized liquefied natural gas (LNG) carriers, the increased cargo hold size is expected to increase the hydrodynamic load on the LNG and exert a very high compressive load on the outer wall of the primary barrier. In this study, a hydraulic pressure test apparatus was manufactured to simulate the compressive load environment caused by the hydrody-namic load and evaluate the pressure-resistance of the intersection of the corrugations of the primary barrier. The deformation history of the intersection and its cross-sectional geometry were investigated for different test pressures using a three-axis strain gauge and an optical 3D scanner, respectively. The results of the internal pressure test at the intersection confirmed that the region near the wide pressing indentation exhibited greater deformation than the region near the narrow pressing indentation, and that the two regions were deformed in opposite directions.
Abstract
With the recent trend towards large-sized liquefied natural gas (LNG) carriers, the increased cargo hold size is expected to increase the hydrodynamic load on the LNG and exert a very high compressive load on the outer wall of the primary barrier. In this study, a hydraulic pressure test apparatus was manufactured to simulate the compressive load environment caused by the hydrody-namic load and evaluate the pressure-resistance of the intersection of the corrugations of the primary barrier. The deformation history of the intersection and its cross-sectional geometry were investigated for different test pressures using a three-axis strain gauge and an optical 3D scanner, respectively. The results of the internal pressure test at the intersection confirmed that the region near the wide pressing indentation exhibited greater deformation than the region near the narrow pressing indentation, and that the two regions were deformed in opposite directions.
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