The single barge floatover method faces great challenges when it comes to the gigantic topsides and the substructures lack of sufficient slots. The twin-barge floatover system with large capacities and great flexibilities for various topsides and substructures would be a promising alternative for fixed and floating platforms. This study experimentally investigates the dynamic responses of the floatover system in beam waves with the focus on one of the critical load transfer steps, namely, the topsides transfer operations onto the twin-barge from a transportation barge. Three representative intermediate stages, i.e., 0%, 50%, and 100% stages, were experimentally simulated. Results revealed that the upwind barge experienced larger motions than others, attributed to the shielding effect. Results implied that the in-between fluid resonant may have great influences on the motions. The twin-barge floatover system were subjected to six degree-of-freedom motions in beam random waves because of the unsymmetrical configurations. The impact loads on mating units demonstrated that the lateral loads were quite considerable and they should be paid much attention. The mooring force varied slightly, and the tether lines bear large snap loads at the 0% stage. The critical stage for different components were identified based on comparisons of loads at three stages.

当涉及到巨大的上部结构和缺乏足够槽的下部结构时，单驳船浮托方法面临着巨大的挑战。具有大容量和适用于各种上部结构和下部结构的灵活性的双驳船浮托系统将是固定和浮动平台的有前途的替代方案。本研究通过实验研究了梁波中浮托系统的动态响应，重点是关键载荷转移步骤之一，即从运输驳船到双驳船上的上部转移操作。三个代表性的中间阶段，即0%、50%和100%阶段，被实验模拟。结果显示，由于屏蔽效应，逆风驳船比其他驳船经历了更大的运动。结果表明，中间流体共振可能对运动产生很大影响。由于配置不对称，双驳船浮托系统在横梁随机波中受到六个自由度的运动。对配合单元的冲击载荷表明侧向载荷相当大，应引起高度重视。系泊力略有变化，系绳在 0% 阶段承受较大的卡扣载荷。根据三个阶段的负载比较，确定了不同组件的关键阶段。对配合单元的冲击载荷表明侧向载荷相当大，应引起高度重视。系泊力略有变化，系绳在 0% 阶段承受较大的卡扣载荷。根据三个阶段的负载比较，确定了不同组件的关键阶段。对配合单元的冲击载荷表明侧向载荷相当大，应引起高度重视。系泊力略有变化，系绳在 0% 阶段承受较大的卡扣载荷。根据三个阶段的负载比较，确定了不同组件的关键阶段。