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Circumferential Sealing Structure of a Subsea Oil and Gas Pipeline Repair Clamp
Strength of Materials ( IF 0.7 ) Pub Date : 2020-04-16 , DOI: 10.1007/s11223-020-00150-5
B. J. Zhao , H. W. Zhu , J. Y. Zhang , S. L. Zhang

A subsea oil and gas pipeline repair clamp and circumferential sealing structure are designed. Based on the principle of equal contact pressure on the contact surface and the thick-walled cylinder calculation, a formula for the contact pressure between the sealing ring and the outer wall of the pipeline is derived. An axisymmetric finite element model is constructed for circumferential sealing with an ABAQUS software suite. The model is used to calculate the contact pressure necessary for the sealing structure, which requires different sealing pressures, and to determine the respective bolt preload for a ∅219-mm clamp. The model also defines a maximum effective contact pressure and average effective contact pressure between the sealing ring and the outer wall of the pipeline. The prediction of the contact force caused by the deformation of a sealing ring due to the geometry restriction was experimentally verified. The finite element and experimental results confirm the validity of grounding in theory and derived formula. The calculations can provide the guidelines for the design of the seal structure of a clamp and the overall structure, as well as future engineering applications.

中文翻译:

海底油气管道维修夹具周向密封结构

设计了海底油气管道维修夹具和周向密封结构。根据接触面上的均匀接触压力原理和厚壁圆筒计算,推导了密封圈与管道外壁之间的接触压力公式。使用ABAQUS软件套件构建轴对称的有限元模型以进行周向密封。该模型用于计算密封结构所需的接触压力,该压力需要不同的密封压力,并确定∅219mm夹具的相应螺栓预紧力。该模型还定义了密封环与管道外壁之间的最大有效接触压力和平均有效接触压力。实验验证了由于几何形状限制而导致的密封圈变形引起的接触力的预测。有限元和实验结果证实了接地理论和推导公式的正确性。这些计算可以为夹具的密封结构和整体结构的设计以及将来的工程应用提供指导。
更新日期:2020-04-16
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