| 摘要 |
PROBLEM TO BE SOLVED: To provide a hull structure allowing easily improving hull strength without increasing hull weight. SOLUTION: The hull 1 is sectioned into a bow part 3, a middle part 4 and a stern part 5 which are made of fiber reinforced plastic. The bow part 3 and the stern part 5 have different structures from that of the middle part 4; e.g. frame structures for the bow part 3 and the stern part 5 and a monocoque structure for the middle part 4. Since the hull 1 is sectioned into three, plates of the bow part 3 and the stern part 5 need not be thick for restricting weight increase of the hull 1 and for reducing construction costs when a plate of the middle part 4 is thickened for improving strength of the hull 1.
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