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首页> 外文会议>International Symposium on Deepwater Mooring Systems: Deepwater Mooring Systems: Concepts, Design, Analysis, and Materials; 20031002-20031003; Houston,TX; US >Impacts of Different Riser Models on Global Responses of a Truss Spar
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Impacts of Different Riser Models on Global Responses of a Truss Spar

机译：不同立管模型对桁架梁整体响应的影响

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摘要

In global motions and mooring analysis for a Truss Spar, the mooring system is usually modeled either quasi-statically or coupled dynamically, while the modeling of riser system is more complicated. This is especially true with large numbers of risers attached to a Spar located in deepwater. In this paper the motions and mooring responses of a Truss Spar under a typical 100-year extreme sea state in three different water depths ranging from 2000ft to 6000ft are analyzed. The mooring system is modeled either quasi-statically or coupled dynamically. For the riser system, two types of risers, Top Tension Risers (TTRs) and Steel Catenary Risers (SCRs) with three different models are investigated: 1) fully coupled dynamics with a finite element model, 2) top tension provided from catenary equation quasi-statically, and 3) a constant force. The ABS in-house Coupled Analysis Program (CAP), which is capable to apply different models for simulating the mooring and riser systems, has been used for this study. The differences in, system stiffness, added-mass, added-damping, and Spar motions as well as mooring loads have been derived for various mooring and riser models in different water depths. The results of these differences are presented and discussed in this paper. The findings from this study will be useful for the design and analysis of vessel motions and mooring responses for deepwater floating installations.
机译：在桁架梁的整体运动和系泊分析中，系泊系统通常采用准静态或动态耦合建模，而立管系统的建模则更为复杂。对于连接到深水中的Spar的大量立管来说尤其如此。本文分析了桁架晶石在典型的100年极端海况下在2000英尺至6000英尺的三种不同水深下的运动和系泊响应。系泊系统是准静态建模或动态耦合建模的。对于立管系统，研究了两种类型的立管：顶部张力提升器（TTR）和具有三种不同模型的钢悬链提升器（SCR）：1）有限元模型的完全动力学耦合； 2）悬链方程准提供的最高张力-静态，以及3）恒力。这项研究使用了ABS内部耦合分析程序（CAP），该程序能够应用不同的模型来模拟系泊系统和立管系统。对于不同水深下的各种系泊和立管模型，得出了系统刚度，附加质量，附加阻尼和Spar运动以及系泊载荷的差异。这些差异的结果将在本文中进行介绍和讨论。这项研究的发现对于深水浮式装置的船舶运动和系泊响应的设计和分析将是有用的。

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