基于半物理仿真的新型浮式平台垂荡性能

为了评估一种新型浮式钻井生产储油装卸系统（FDPSO）概念设计中干式井口平台的垂荡性能，建立了系统的理论分析模型，并运用半物理仿真技术构筑了大比尺模型实验平台，用可控的电液伺服器运动台模拟船体的垂荡，干式井口系统采用大比尺的物理模型。在简谐激励下理论模型的实验结果和数值结果的对比，证明了理论模型的合理性，符合工程实际。根据该理论模型对中国南海海况进行的数值分析结果表明，通过船外悬挂配重为干式井口平台的张紧立管系统提供张力的概念设计对船体的垂荡具有自动补偿作用，减小了干式井口平台的垂荡振幅。

Heave motion analysis of a new-style floater based on semi-physical simulation

In order to evaluate the heave motion performance of a dry wellhead deck in the conceptual design of a new-style floating drilling production storage and offloading system(FDPSO),we established a theoretical model for the analysis of a complex tension system and constructed a large-scale experimental platform with a semi-physical simulation technique,which simulated the hull’s heave motion on a motion platform controlled by an electro-hydraulic servosystem and applied a large-scale physical model to the dry wellhead system.The comparison between experimental and numerical results of the theoretical model under simple harmonic excitation proved the rationality of the model because they were in accordance with engineering reality.Results of the numerical analysis performed on the oceanic condition of the South China Sea with the theoretical model indicate that the conceptual design that tension is supplied to the riser system of a dry wellhead deck through the balance weight suspended on the outside of a hull is of automatic compensation to the hull’s heave motion,which can reduce the heave motion amplitude of a dry wellhead deck.