Research on the hydrodynamic influence from the gaps between three identical boxes by a scaled boundary finite element method
Research on the hydrodynamic influence from the gaps between three identical boxes by a scaled boundary finite element method
复制标题
DOI：
--
复制
发表时间：
2006
影响因子：
6
通讯作者：
He Guang-hua;Teng Bin;Liang Bo-ning;C. Liang
中科院分区：
文献类型：
--
作者：
He Guang-hua;Teng Bin;Liang Bo-ning;C. Liang
本研究的目的是提供一些一般性的提示水波浪作用的水动力相互作用的大型浮式结构组成的一些箱，本文用比例边界有限元法计算了有限水深中三个相同的二维盒子在固定平均位置上的波浪作用问题，并与边界元法进行了比较，得到了水平和水平方向上的尖峰响应，结果表明，作用在每个箱体上的竖向波浪力都在两个相近的特殊共振频率附近发生共振，而作用在中间箱体上的水平波浪力和竖向波浪力只在其中一个特殊共振频率附近发生共振，这一点与作用在上浪箱和背风箱上的波浪力和竖向波浪力不同，其共振频率受箱体吃水的影响，计算结果表明，本文方法计算结果与试验结果吻合较好，对大型浮式结构的模块化设计具有一定的指导意义该方法具有未知数少、收敛速度快的特点，可用于分析大型浮式结构物，并考虑了间隙的影响，而不存在数值困难。
The present study aims to give some general hints about hydrodynamic interactions for water wave action with a large floating structure composed of a number of box-shaped modules with small gaps between them.The problem of wave action with three identical 2D boxes in a fixed mean position in a finite water depth is computed by the scaled boundary finite element method and compared with a BEM.Sharp peak responses for both horizontal and vertical wave forces on each block are found around two closely special resonance frequencies.While horizontal wave force and vertical wave force on the middle box resonate only around one of the special resonance frequencies,which is different from the ones on both the up wave box and the leeside box.The resonance frequencies are influenced by box draft,box width and gap width.Examinations are carried out demonstrate the influence of the three variables on the resonance frequency.The present results are of practical significance to design of links of modules for very large floating structures.The result shows that the present method yields excellent result with less unknowns and quick convergence.It has a potential for analyzing very large floating structures and takes the gaps into consideration without numerical difficulties.