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截头圆柱群是许多海洋浮式结构的主要组成部分。目前对这种圆柱群进行的水动力分析大多考虑将其作为一个整体,此时各柱间无相对位置变化,这并不适用于柱间有相对运动的情况。为此,采用特征展开法研究各柱做不同辐射运动时截头直立圆柱群的水动力相互作用。开展了截头圆柱群中各柱做不同幅值纵荡、横荡和垂荡运动时的波浪辐射分析,并求得流场速度势。在进行算例考核之后,进一步计算了多个圆柱同时做不同模态、不同幅值运动时截头柱群的水动力、压力分布等量,并对结果进行了分析。
The truncated cylinder group is a major component of many marine floating structures. At present, the hydrodynamic analysis of such a cylindrical group is mostly considered as a whole. In this case, there is no relative position change between the columns, which does not apply to the case where there is relative motion between columns. For this reason, the eigenfunctions method is used to study the hydrodynamic interaction of truncated erected cylindrical groups with different radiation movements. The analysis of the wave radiation of each column in the truncated cylinder group with different amplitudes of oscillation, swaying and heaving motion was carried out and the velocity potential of the flow field was obtained. After evaluating the examples, the hydrodynamic and pressure distributions of the truncated column groups with different modes and different amplitudes were simultaneously calculated for multiple cylinders at the same time. The results were also analyzed.