Hydrodynamic Difference of Rectangular-Box Systems with and without Narrow Gaps
Hydrodynamic Difference of Rectangular-Box Systems with and without Narrow Gaps
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DOI：
10.1061/(asce)em.1943-7889.0000935
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发表时间：
2015-08
期刊：
影响因子：
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通讯作者：
D. Ning;X. Su;Ming Zhao;B. Teng
中科院分区：
文献类型：
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作者：
D. Ning;X. Su;Ming Zhao;B. Teng
摘要为了分析有、无窄缝海洋结构物的水动力差异，建立了二维全非线性时域数值波浪水槽，研究了波浪中多个相邻矩形箱形结构物周围的水动力特性。在数值模型中，入射波由域内源产生，这样可以避免在输入边界处的二次反射。瞬时自由表面满足完全非线性的运动学和动力学边界条件，间隙中的自由表面采用人工阻尼来模拟粘性效应。该模型首先验证了一个孤立的盒子和双和三箱系统的实验数据与窄间隙。通过大量的数值试验，比较了矩形箱上有无窄缝时的波高和波浪载荷。第一个比较是在一个多箱系统的每个单独的箱子之间的流体动力学。
AbstractTo analyze the hydrodynamic difference between marine structures with and without narrow gaps, a two-dimensional fully nonlinear time-domain numerical wave flume is developed to investigate the hydrodynamics around multiple rectangular-box structures close to one another in waves. In the numerical model, the incident waves are generated by inner-domain sources such that re-reflection at the input boundary can be avoided. The fully nonlinear kinematic and dynamic boundary conditions are satisfied for the instantaneous free surface, and artificial damping is used for the free surface in the gaps to model the viscous effect. The proposed model is first validated against the experimental data for an isolated box and twin- and triple-box systems with narrow gaps. Then extensive numerical experiments are performed to compare the wave heights and wave loads on rectangular boxes with and without narrow gaps. The first comparison is made between the hydrodynamics of each individual box of a multiple-box sy...