Equivalent Calculation of Critical Collapse Pressure of Flexible Pipes and Parametric Analysis of Collapse Influence Factors
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 12, Issue 1
Abstract
Collapse bucking is a typical failure mode of flexible pipes during deepwater service. It is essential to investigate the failure characteristics and obtain the accurate critical collapse pressure to improve the design of flexible pipes and make them more durable in a deepwater environment. Firstly, an equivalent layer method based equivalent hoop stiffness is presented in the paper. Then, the proposed method is verified by corresponding comparative analysis. Next, two-dimensional (2D) collapse numerical models are created based on the verified method. Finally, the parametric analysis of collapse influence factors is carried out by the arc-length method. The results show that the equivalent method is valid and convenient for obtaining the equivalent thickness of the carcass layer. The parametric analysis results under different collapse influence factors can provide some useful advice for collapse-resistant design of flexible pipes.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (Nos. 11627802 and 51979111) and the Funds for Marine Economic Development of Guangdong Province (No. GDME-2018B003). The authors would like to express gratitude to these foundations.
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Published In
Journal of Pipeline Systems Engineering and Practice
Volume 12 • Issue 1 • February 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Apr 8, 2020
Accepted: Aug 17, 2020
Published online: Oct 31, 2020
Published in print: Feb 1, 2021
Discussion open until: Mar 31, 2021
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