Coupled FPSO roll motion response and tank sloshing in a pair of two row cargo tanks

Abstract

The advantages offered by Floating Production Storage and Offloading Units (FPSOs) continue to make them high in demand and widely used. Continuous loading and offloading of FPSOs means the presence of slack cargo tanks is inevitable and can impact the seakeeping performance of FPSOs. Published experimental data on this impact is limited. This paper experimentally studies liquid cargo and its effect on roll motion in a pair of two-row cargo tanks of a FPSO model in regular beam waves. The results show that the liquid cargo motion effect on floating vessels cannot be studied using solid cargo. The results also show that varying the liquid cargo loading affects floating vessels’ Response Amplitude Operators (RAOs).