新型对接棱台状FPSO的浮体参数和水动力分析

摘要

In order to solve the performance limitations of traditional ship-type and prismatic FPSO, a novel concept of docking pyramidal FPSO is presented. For the new floating body, five independent shape parameters are presented to decide the geometry of floating body and also affect the basic functions and hydrodynamic performance of FPSO. Then boundary element method based on potential flow theory is applied to analyze the motion response of docking pyramidal floating body in wave. Furthermore, the effect of shape parameters on the hydrodynamic performance of FPSO is qualitatively studied, and the design guideline of the new floating body is also proposed to improve the heave motion performance based on wave potential flow theory and engineering approximate method. Finally, the new floating body can be designed according to the basic functions of an octagon FPSO, and the comparison results show the performance advantages of docking pyramidal FPSO and the rationality of design principle in this paper provide effective engineering equipment and solutions for deep-water oil and gas development.%为解决传统船型和棱柱筒状FPSO的性能局限,提出一种具有对接棱台状浮式主体的新概念FPSO.根据所研发的新型对接棱台状浮体模型,确定了能够反映浮体几何形状、FPSO基本功能和水动力性能的5个相互独立的外形参数.然后,采用基于频域势流理论的边界元数值模拟方法研究了新型对接棱台状浮体在波浪中的运动响应,并且定性分析了不同浮体外形参数(下倾角、水线面外接圆半径等)对浮体水动力性能的影响.最后,根据频域势流理论和工程近似方法,分析并概括出基于垂荡运动性能的新型浮体设计准则和方案.在此基础上,结合某棱柱型FPSO的基本功能(载重量、排水量、储油空间、上甲板面积的设计值) ,完成新型FPSO的主浮体设计.通过性能比较,证明了对接棱台状FPSO的水动力性能优势和设计方案有效合理性,以期能够为深水油气开发提供一种有效的新型工程装备和解决方案.