FLUID RESONANCE IN NARROW GAPS OF VERY LARGE FLOATING STRUCTURE COMPOSED OF RECTANGULAR MODULES
Fluid resonance in narrow gaps of very large floating structure is investigated experimentally and theoretically. Especially, this study focus on the case of three rectangular modules with two gaps in order to make clear the difference with the case of one gap in which the authors (Saitoh et. al., 2003, 2006) have already had the experimental confirmation of occurrence of fluid resonance in the gap. Appearance conditions of fluid resonance are derived using the conservation of energy in the gaps and around two modules on the side of incident wave. In the derivation, first, two natural frequencies in the gaps are led as the frequencies described by the gravity acceleration and the geometrical conditions of floating structure including a water depth. Then, the appearance conditions are obtained substituting a dispersion relation of incident wave into the natural frequencies as kl1,2 tanh kh = 1 (k is the incident wave number, l1,2 : l1, l2 are the geometrical conditions, h is the water depth). The validity of the appearance conditions are verified by the comparison with the experimental results.
Fluid resonance Narrow gaps Very large floating structure
Hideki Iwata Takehisa Saitoh Guoping Miao
Honma Co., Ltd., 3300-3 Nishiminatodouri San-no-machi, Niigata City, 951-8650, Japan Department of Civil Engineering, Kanazawa University, Kakuma-machi,Kanazawa City, 920-1192,Japan School of Naval Architecture and Ocean Engineering, Shanghai Jiao Tong University, Shanghai,200030,
国际会议
第四届亚太地区海岸会议(the Fourth International Conference on Asian and Pacific Coasts)
南京
英文
2007-09-21（万方平台首次上网日期，不代表论文的发表时间）