Structural optimization model of confined polyhedral composite subsea pipelines under pressure and thermal fields
This paper investigates the structural optimization of a polyhedral composite subsea pipeline (cylinder) under pressure and thermal fields. The pipeline is confined tightly and deforms inward when it is subjected to external loadings. The interface is frictionless between the pipeline and its surrounding medium. Based on the above assumptions, thin-walled shell principles, and an admissible displacement function, the potential energy of a pipeline per unit length is obtained explicitly by simplifying the radius and bending rigidity. After taking the first derivative of the potential energy, two equilibrium equations are obtained. By combining these two equations, the critical buckling pressure of the polyhedral pipeline is expressed analytically with the inclusion of the temperature effects. Then, the present analytical study is compared with other numerical and experimental results, and excellent agreements are reached. A configuration factor is defined as the buckling pressure between the polyhedral and circular pipeline. Finally, parametric studies show the configuration factor decreases with the increase of thickness-to-radius ratio, the increase of the number of sides, and the increase of the temperature variation, respectively. Therefore, a polyhedral pipeline with a low thickness-to-radius ratio is recommended in engineering practices since it may reduce the material cost.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/09518339
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Supplemental Notes:
- © 2023 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
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Authors:
- Xiao, Xinhui
- Zhang, Qian
- Chang, Guoyong
- Liu, Yang
- Li, Zhaochao
- 0000-0003-0988-5792
- Publication Date: 2024-3
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: 103548
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Serial:
- Marine Structures
- Volume: 94
- Issue Number: 0
- Publisher: Elsevier
- ISSN: 0951-8339
- Serial URL: https://www.sciencedirect.com/journal/marine-structures
Subject/Index Terms
- TRT Terms: Buckling; Optimization; Pressure fields; Structural analysis; Thin walls; Underwater pipelines
- Subject Areas: Geotechnology; Hydraulics and Hydrology; Pipelines;
Filing Info
- Accession Number: 01903647
- Record Type: Publication
- Files: TRIS
- Created Date: Dec 28 2023 1:26PM