In this study, hull dimensions of an FPSO were optimized to maximize its operability at Brazil field. In contrast with the previous works which have used simplified models to evaluate some indicators related to stability and hydrodynamic performances of FPSOs for its own optimal design, we developed a generic hull and compartment modeler and sophisticated stability and hydrodynamic calculation modules. With the aid of the developed tools, the hull optimization was performed with initial dimensions of an FPSO originally designed for west Africa field. The optimization results indicated the relative importance of hydrodynamic performances compared with stability performances for the FPSO hull dimensioning by showing that there were 3 active constraints related to them, which were the natural periods of heave and roll and the maximum pitch angle under 1-year return period waves at full load condition. To the author's knowledge, this study is the first attempt to combine altogether the hull and compartment modeling and full set of stability and hydrodynamic calculations precisely to optimize an FPSO's hull dimensions within 30 min. Also, it is worthwhile to mention that the developed methods are generic enough to be applied to all types of ship-shaped offshore platforms.

在这项研究中，FPSO 的船体尺寸经过优化，以最大限度地提高其在巴西油田的可操作性。与之前使用简化模型评估与 FPSO 自身优化设计的稳定性和水动力性能相关的一些指标的工作相比，我们开发了通用的船体和舱室建模器以及复杂的稳定性和水动力计算模块。在开发的工具的帮助下，船体优化是用最初为西非油田设计的 FPSO 的初始尺寸进行的。优化结果表明，与 FPSO 船体尺寸设计的稳定性性能相比，水动力性能的相对重要性通过显示与它们相关的 3 个主动约束，为满载条件下1年重现期波浪下的自然升沉周期和最大俯仰角。据作者所知，这项研究是首次尝试将船体和舱室建模以及全套稳定性和水动力计算精确地结合起来，以在 30 分钟内优化 FPSO 的船体尺寸。此外，值得一提的是，所开发的方法具有足够的通用性，可以应用于所有类型的船形海上平台。