This paper presents a numerical investigation on the hydrodynamic performance of sandglass-type FPSOs with four different cross sections. In order to estimate the hydrodynamic performance and utilise the results in the design stage of FPSOs, a frequency-domain numerical simulation program, ANSYS/AQWA software package, has been used. Numerical results were compared with experimental data and good agreement has been achieved in small amplitude regular wave cases. Based on the simulation results, it is concluded that polyhedral cross sections (especially 10-sided cross section) provide similar hydrodynamic performance compared with circular cross section in heave and pitch motions for all ranges of wave frequency. Therefore, it is possible to use these types of cross sections for FPSOs because of manufacturing simplicity.

中文翻译：

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不同截面对规则波浪作用下沙漏型浮式生产储油船水动力行为的影响

本文对具有四种不同横截面的沙漏型 FPSO 的水动力性能进行了数值研究。为了在 FPSO 的设计阶段估计水动力性能并利用结果，使用了频域数值模拟程序 ANSYS/AQWA 软件包。数值结果与实验数据进行了比较，在小振幅规则波情况下取得了良好的一致性。根据模拟结果，得出结论，在所有波浪频率范围内，多面体横截面（尤其是 10 边形横截面）在升沉和俯仰运动中提供与圆形横截面相似的水动力性能。因此，由于制造简单，可以将这些类型的横截面用于 FPSO。