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首页> 外文会议>International offshore and polar engineering conference;ISOPE-2009 >Numerical Simulation on the Hydrodynamic and Kinetic Performance of a New Deep Draft Platform
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Numerical Simulation on the Hydrodynamic and Kinetic Performance of a New Deep Draft Platform

机译：新型深吃水平台水动力和动力学性能的数值模拟

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This paper is primarily concerned with a novel floating platformDDMS i.e. Deep Draft Multi-Spar, which is especially designed fordrilling and production in deep and ultra deepwater field. The hard tankof DDMS is composed of four deep draft spars which have relativelysmall diameter. A particular spar is added at the center of the platformin order to create a closed moonpool which is open to the sea at thebottom to protect the top tensioned risers. Considering the platform'sstability, a soft tank filled with metal or high density fluid is used tomake the CG i.e. center of gravity under the CB i.e. center of buoyancy.Meanwhile three heave plates are employed to decrease the heavemotion amplitude. The main advantages of the DDMS platform are lessfabricative cost and difficulty, better motion behavior, more designflexibility etc. Firstly the concept of DDMS is introduced and theprocess of conceptual design is described. Then the 1st orderhydrodynamic information is obtained by 3D high order BEM based onthe diffraction and radiation theories. The numerical model isestablished and RAOS are acquired later. Newman's approximation isadopted to predict the 2nd order hydrodynamic information and finallythe motions of time histories of 3 hours are simulated. The responsespectra under three different extreme ocean environment conditions areanalyzed and compared. The simulative results reveal the favorablemotion performance especially the heave response.
机译：本文主要涉及新颖的浮动平台DDMS，即Deep Draft Multi-Spar，它是专门为深水和超深水领域的钻井和生产而设计的。 DDMS的硬罐由四个直径较小的深吃水梁组成。在平台的中心处添加了一个特殊的翼梁，以创建一个封闭的月池，该池在底部向海敞开，以保护顶部张紧的立管。考虑到平台的稳定性，使用装有金属或高密度流体的软罐将CG（即重心）置于CB下方（即浮力中心），同时使用三个升沉板来降低升沉幅度。 DDMS平台的主要优点是制造成本和难度更低，运动行为更好，设计灵活性更高。首先，介绍DDMS的概念，并描述概念设计的过程。然后，基于衍射和辐射理论，通过3D高阶BEM获得一阶水动力信息。建立数值模型，随后获取RAOS。采用纽曼近似法对二阶水动力信息进行预测，最后模拟了3小时的时间历程。对三种不同的极端海洋环境条件下的响应谱进行了分析和比较。仿真结果显示了良好的运动性能，特别是升沉响应。

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