| 摘要 |
PROBLEM TO BE SOLVED: To reduce oscillation over a wide wave period of range and even in a high wave by arranging a plate extending downward from the bottom surface of a large floating body with penetrating through the water surface and a breakwater member having a submerged horizontal plate extending forward from a lower end part of the plate in a wave upper side front end part of the large floating body. SOLUTION: For example, a steel plate breakwater member 4 is fixed as a wave resistant structure over the whole width of a large floating body 1 to a wave upper side front end part 1a of the large floating body 1. The breakwater member 4 is constituted in an almost L shape out of a vertical plate 5 as a plate extending downward from the bottom surface 1b of the large floating body 1 by penetrating through the water surface and a submerged horizontal plate 6 as a submerged plate integrally extending forward from a lower end part of the vertical plate 5. When a wave enters from the wave upper surface in a state of being floated on the water, fluctuating pressure applied to the submerged horizontal plate 6 of the breakwater member 4 and fluctuating pressure applied to the bottom surface of a front end part 1a of the large floating body 1 become an antiphase to offset each other. Thus, pressure integral value of a wave acting on the front end part of the large floating body 1 becomes small to reduce oscillation.
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