CHARACTERISTICS AND APPEARANCE CONDITIONS OF FLUID RESONANCE IN NARROW GAPS OF VERY LARGE FLOATING STRUCTURE COMPOSED OF RECTANGULAR MODULES
CHARACTERISTICS AND APPEARANCE CONDITIONS OF FLUID RESONANCE IN NARROW GAPS OF VERY LARGE FLOATING STRUCTURE COMPOSED OF RECTANGULAR MODULES
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DOI：
10.2208/prooe.22.845
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
T. Saitoh;H. Iwata;Y. Takahashi;G. Miao;H. Ishida
中科院分区：
文献类型：
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作者：
T. Saitoh;H. Iwata;Y. Takahashi;G. Miao;H. Ishida
本文从实验和理论两方面研究了由多个矩形模组组成的超大浮体结构窄间隙内的谐振特性。特别地，本研究的重点是三个模块有两个间隙的情况，以明确与一个间隙的情况的区别，在一个间隙的情况下，作者已经得到了在间隙中发生流体共振的实验证实。利用入射波侧面的间隙和两个模块周围的能量守恒，导出了流体共振的出现条件。在推导中，首先将间隙中的两个固有频率作为重力加速度和包含水深的浮动结构几何条件所描述的频率。然后，将入射波的色散关系代入固有频率，得到出现条件kl1, 2tanh kh=1 （k为入射波数，l1, 2, l1, 1, 2为几何条件，h为水深）。通过与实验结果的比较，验证了外观条件的有效性
Characteristics of resonant phenomena in narrow gaps of very large floating structure composed of a number of rectangular modules are investigated experimentally and theoretically. Especially, this study focus on the case of three modules with two gaps in order to make clear the difference with the case of one gap in which the authors 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, 2tanh kh=1 (k is the incident wave number, l1, 2: l1, l, 2are the geometrical conditions, h is the water depth). The validity of the appearance conditions are verified by the comparison with the experimental results