| 摘要 |
PROBLEM TO BE SOLVED: To provide a double hull structure in which any stress concentration is not present in a bilge part, and deformation or damages hardly occurs. SOLUTION: A double bottom is constituted of a bottom shell plate 11 and an inner bottom plate 12, and a double side is constituted of a side shell plate 13 and a double side bulkhead 14. A bilge hopper part 20 is provided between the double bottom and the double side. A bilge inner plate 22 of the bilge hopper part 20 is formed in a curved surface, and smoothly joined without forming any angle at a joining part with the inner bottom plate 12 and a joining part with the double side bulkhead 14. Thus, no stress concentration is present in the joining part of the bilge inner plate 22, deformation or damages hardly occur by the external force to the bottom, and the tank capacity is increased. COPYRIGHT: (C)2005,JPO&NCIPI
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