The effect of seabed flexibility on the impact damage behavior of submarine sandwich pipes

Sandwich pipe (SP) is regarded as an ideal deep water oil and gas transportation solution and has attached more and more attention attributed to its good structural resistance and thermal insulation performance. The local dent damage of SP induced by the falling objects impact might result in the leakage of oil and gas resources. This work investigates the dent behavior of sandwich pipes subjected to falling object impact through finite element(FE) numerical simulation by considering the effect of seabed flexibility. A three-dimensional FE model was established and validated to accurately capture the structural behavior of SP lying on the seabed. The sensitive parameters studies were performed to assess the influence of falling object mass, kinetic energy and buried depth on the dent characteristics. The results show that the flexible seabed foundation can effectively reduce the local dent damage degree of sandwich pipes and most of the kinetic energy is dissipated by the annular layer so as to provide protect for the steel pipes. Besides, the outer pipe, annular layer and inner pipe show different dent depth and strain levels as the kinetic energy of falling objects changes. The degree to which the speed and mass of falling objects affect the characteristics of depressions depends on the magnitude of the kinetic energy of the falling object. Based on the parameters analyses, a group of empirical formulas are established to provide prediction of dent depth and dent strain for sandwich pipes.

• Record URL:
  • https://doi.org/10.1016/j.apor.2023.103838
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0141118723003796
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01411187
• Supplemental Notes:
  • © 2023 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Chen, Weihua
  • Wan, Feng
  • Guan, Feng
  • Liu, Xianming
  • Yang, Yiqi
  • Zhou, Chuanxi
• Publication Date: 2024-1

Language

• English

Media Info

• Media Type: Web
• Features: Appendices; Figures; References; Tables;
• Pagination: 103838
• Serial:
  • Applied Ocean Research
  • Volume: 142
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0141-1187
  • Serial URL: https://www.sciencedirect.com/journal/applied-ocean-research

Subject/Index Terms

• TRT Terms: Composite materials; Impact tests; Loss and damage; Ocean bottom; Sandwich construction; Steel pipe; Underwater pipelines
• Subject Areas: Materials; Pipelines;

Filing Info

• Accession Number: 01907677
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 9 2024 2:51PM