大型浮体を構成する浮体要素間の微小間隙における流体共振特性に関する実験的研究

抄録

A laboratory experiment was conducted for experimental confirmation of an appearance of resonant phenomena in a narrow gap between modules of very large floatings tructure under waves. Then, the characteristics of resonant waver number kh (k: incident wave number, h: water depth) were discussed at different set-up conditions of the modules. A theoretical analysis was also examined by a dividing region method combined with anasymptotic matching method in which the influence of narrow gap was considered. Furthermore, the characteristics of energy transport as the resonance happened were discussed by reflected wave energy and transmitted one.
Consequently, the appearance of resonant phenomena was confirmed in the laboratory experiments. Moreover, it was shown that the resonant wave number shifted to high frequency region as the draft and the gap width decreases. Then, it was found that the experimental results on resonant wave number agree well with the theoretical results, and that wave energy concentrates in the narrow gap as the resonance happened.