南海桁架式深吃水立柱式平台水动力性能

应用三维势流理论、非线性时域动力耦合分析方法以及深海平台混合模型试验研究方法，针对我国南海北部一座15 km桁架式深吃水立柱式平台（Truss Spar），在不同海况下对作业装载的平台锚泊系统进行了截断水深模型试验、数值重构研究，并数值外推到全水深，较好地预报了其水动力性能，包括纵荡、垂荡和纵摇. 经分析：Truss Spar平台的垂荡、纵摇低频运动分量较大，同时纵荡也表现出很强的低频特性；此外，平台具有较小的垂荡运动幅值，垂荡性能较好，能较好地满足海上油气生产的要求.

Investigation on Hydrodynamics of a Truss Spar in South China Sea

Based on 3D potential theory,dynamic coupled time-domain analysis and hybrid model testing technique,investigations are focused on a 1 500 m deepwater Truss Spar in South China Sea with different sea states for operational loading condition.Hydrodynamic performances of the Spar are well predicted including surge,heave and pitch motions.It can be concluded that low-frequency response of heave and pitch motions should be taken seriously,as well as the surge motion,which is mainly predominant by low frequency response.While the heave motion response seems relatively moderate.It can satisfy the requirements of offshore oil and gas production.