Modelling Changes to Submarine Pipeline Embedment and Stability due to Pipeline Scour

S. Draper, T. Griffiths, Liang Cheng, D. White, H. An
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引用次数: 3

Abstract

In this paper a beam bending model is combined with existing predictive formulas for pipeline scour to study changes to pipeline stability during scour and lowering. The model is introduced and demonstrated for a range of simplified conditions, including scour-induced lowering of a pipeline resulting from multiple uniformly spaced scour initiation points. The model is then used with a synthetic seabed generated with a variety of length scales. In this simulation the pipeline is ‘laid’ onto the seabed, leading to the formation of ‘natural’ initiation points for scour. The distribution and spacing of the initiation points (which are a function of the pipeline bending stiffness, tension and seabed roughness) lead to different rates of pipeline lowering and stability. The resulting model may be used within a probabilistic framework to estimate changes to pipeline stability resulting from sediment mobility and scour.
管道冲刷对海底管道埋置和稳定性的影响
本文将梁弯曲模型与现有的管道冲刷预测公式相结合,研究了冲刷和降低过程中管道稳定性的变化。该模型在一系列简化条件下进行了介绍和演示,包括由多个均匀间隔的冲刷起爆点引起的管道冲刷引起的降低。然后将该模型与合成的具有各种长度尺度的海床一起使用。在这个模拟中,管道被“铺设”在海床上,导致形成“自然”的冲刷起始点。起爆点的分布和间距(是管道弯曲刚度、张力和海底粗糙度的函数)导致管道降低和稳定的速率不同。由此产生的模型可以在概率框架内使用,以估计泥沙流动性和冲刷引起的管道稳定性变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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