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Study of the Factors Involved in the Strength of Dented Pipeline

机译：管道凹陷强度影响因素的研究

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摘要

The dent on the pipeline is one of the important factors that influence the pipelinernstrength. Many international pipeline design standards generally use the dent depth tornappraise whether the dented pipeline needs to be repaired. However, most of therndents that satisfied the standard still to be able to fail, so need to analyze morernparameters that influence the dent strength and find out the relationship betweenrnthem. Using the finite element method, the finite element models were establishedrnunder different circumstances, and the strength of the dented pipeline that wasrnapplied internal pressure was calculated. Non-linear regression analysis was utilizedrnto fit the results by Matlab, then the expressions of the relationships between therndented pipeline strength and the geometric parameters of dent, pipeline diameter,rnwall thickness and internal pressure were obtained under different circumstances.rnThis can be used as part of the basic research of the pipeline design standards, andrnimprove the accuracy of the dented pipeline assessment, as well as ensure that thernsecurity and reliability of the pipeline design and operation.
机译：管道凹痕是影响管道强度的重要因素之一。许多国际管道设计标准通常使用凹痕深度来评估凹陷的管道是否需要维修。然而，大多数满足标准的热熔胶仍然会失败，因此需要分析更多影响压痕强度的参数，并找出它们之间的关系。利用有限元方法，建立了不同情况下的有限元模型，并计算了施加内压的凹陷管道的强度。利用非线性回归分析对结果进行Matlab拟合，得到了在不同情况下弯曲的管道强度与凹痕的几何参数，管道直径，壁厚和内压之间关系的表达式。对管道设计标准的基础研究，提高了管道凹陷评估的准确性，并确保了管道设计和运行的安全性和可靠性。

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