Investigating Ice Loads on Subsea Pipelines with Cohesive Zone Model in Abaqus

Igor Gribanov, Rocky Taylor, Jan Thijssen, Mark Fuglem
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Abstract

Subsea pipelines and cables placed in ice-prone regions may be at risk of iceberg damage. In particular, pipes that are not buried may come in direct contact with iceberg keels. Knowing the range of interaction forces helps to assess the types and magnitudes of potential damage. Experimental studies provide the most valuable data about the interaction forces, while numerical modeling may give insight into configurations that are difficult to study experimentally. This work applies the cohesive zone model to investigate the fracture behavior of ice samples. Simulations are performed in 2D with Abaqus explicit solver. Modeled interaction forces from multiple simulations are recorded and compared to understand how the geometry of the samples affects the fracture. Repeat interactions with different grain configurations are conducted to investigate associated variance in fracture patterns and loads. t-tests show that the force application angle and the indenter’s position significantly affect the fracture force.
基于Abaqus黏聚区模型的海底管道冰荷载研究
放置在易结冰地区的海底管道和电缆可能面临冰山破坏的风险。特别是,没有埋在地下的管道可能直接接触到冰山龙骨。了解相互作用力的范围有助于评估潜在损害的类型和程度。实验研究提供了有关相互作用力的最有价值的数据,而数值模拟可以深入了解难以通过实验研究的结构。本文应用内聚区模型研究了冰样的断裂行为。利用Abaqus显式求解器进行了二维仿真。从多个模拟中得到的模型相互作用力被记录下来,并进行比较,以了解样品的几何形状如何影响裂缝。与不同晶粒结构的重复相互作用是为了研究断裂模式和载荷的相关变化。t检验表明,施力角和压头位置对断裂力有显著影响。
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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