In multi-body offshore systems, a telescopic gangway is often adopted for personnel transfer, the feasibility and safety of which are crucial. The coupled dynamics and gangway responses of a turret-moored floating production storage and offloading (FPSO) unit and a semi-submersible accommodation platform (AP) were investigated numerically in this study. Both side-by-side arrangement and the configuration that AP is tandem at the stern of FPSO were considered. The hydrodynamics considering multi-body wave interaction were calculated in frequency domain based on potential theory. The non-linearity of second-order wave drifts, moorings, and turret was fulfilled in time domain. We focused mainly on the effects of multi-body interactions on hydrodynamics and gangway responses. The hydrodynamic interactions have a negligible effect on the global motions of FPSO, whereas it more strongly affects AP. The interference is more intense in side-by-side scenario than in tandem configuration. The gangway responses are governed by relative translational motions between two vessels and are also related to its initial arrangement. Since weathervaning of FPSO can cause a large yaw offset, non-collinear sea states are considered, in addition to cases with different significant wave heights. Extreme gangway responses are predicted according to Weibull distribution, by which the environment criteria are determined.

在多体海上系统中，人员转移通常采用伸缩舷梯，其可行性和安全性至关重要。在此研究中，对塔楼系泊的浮动生产存储和卸载（FPSO）单元和半潜式适应平台（AP）的耦合动力学和舷梯响应进行了数值研究。同时考虑了并排布置和在FPSO尾部串联AP的配置。基于势能理论，在频域中计算了考虑多体波相互作用的流体力学。在时域中实现了二阶波漂移，系泊和炮塔的非线性。我们主要关注多体相互作用对流体动力学和舷梯响应的影响。流体动力相互作用对FPSO的整体运动影响可忽略不计，而对AP的影响更大。并排方案中的干扰比串联配置中的干扰更严重。舷梯的响应受两艘船之间的相对平移运动支配，也与其初始布置有关。由于FPSO的风向标可导致较大的偏航偏移，因此，除了具有不同有效波高的情况外，还应考虑非共线海况。根据威布尔分布预测极端的舷梯响应，从而确定环境标准。舷梯的响应受两艘船之间的相对平移运动支配，也与其初始布置有关。由于FPSO的风向标可导致较大的偏航偏移，因此，除了具有不同有效波高的情况外，还应考虑非共线海况。根据威布尔分布预测极端的舷梯响应，从而确定环境标准。舷梯的响应受两艘船之间的相对平移运动支配，也与其初始布置有关。由于FPSO的风向标可导致较大的偏航偏移，因此，除了具有不同有效波高的情况外，还应考虑非共线海况。根据威布尔分布预测极端的舷梯响应，从而确定环境标准。