Dynamic response of steel catenary riser using a seabed interaction under random loads
Dynamic response of steel catenary riser using a seabed interaction under random loads
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DOI：
10.1016/j.oceaneng.2013.05.022
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发表时间：
2013-09
影响因子：
5
通讯作者：
H. Elosta;Shan Huang;A. Incecik
中科院分区：
文献类型：
--
作者：
H. Elosta;Shan Huang;A. Incecik
深入了解钢悬链线立管（SCR）与土壤的相互作用机制，为预测接触网立管在触地区（TDZ）的动力响应和结构特性提供了一种现实的技术手段。本文讨论了SCR -海床相互作用在深水应用SCR设计中的重要性，并报告了使用商业代码OrcaFlex进行非线性时域模拟的结果，该模拟采用鲁棒网格技术对910 m水深的软粘土上的SCR进行了分析。在本文报道的研究中，研究了SCR在TDZ的垂直嵌入和大的横向移动。在模拟过程中，在海底垂直方向采用了滞回非线性模型，在海底横向方向采用了双线性和三线性模型。研究发现，TDZ响应导致海床土在循环荷载作用下刚度退化。此外，改进的scr -土壤相互作用模型可以准确预测土壤刚度和隔水管穿透度，使我们能够更准确地预测TDZ的整体隔水管动态性能。
It is important to develop better understanding of the Steel Catenary Riser (SCR)–soil interaction mechanism to provide a realistic technique to predict the dynamic response and structural behaviour of the SCR in the Touchdown Zone (TDZ).This paper discusses the significance of SCR–seabed interaction in the design of SCR for deepwater applications and reports the results of an analysis of an SCR on soft clay in 910 m depth of water using the commercial code OrcaFlex for non-linear time domain simulation with a robust meshing technique. In the study reported in this paper, the vertical embedment and large lateral movements of the SCR in the TDZ were investigated. During the simulations the seabed has been modelled using a hysteretic non-linear model in vertical seabed direction, and bilinear and trilinear models in the lateral seabed direction. It has been found that the TDZ responses result in the degradation of the seabed soil stiffness due to cyclic loading. Furthermore, an improved SCR–soil interaction model, with accurate prediction of soil stiffness and riser penetration enables us to more accurately predict global riser dynamic performance in the TDZ.