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Advanced Research in Flexible Riser and Pipelines
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Advanced Research in Flexible Riser and Pipelines

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Ocean Engineering".

Deadline for manuscript submissions: 25 March 2025 | Viewed by 1740

Special Issue Editors

Prof. Dr. Yong Bai

E-Mail Website
Guest Editor
College of Civil Engineering and Architecture, Zhejiang University, Zhejiang, China
Interests: marine structural engineering; offshore artificial intelligence development and application; subsea pipelines and risers; construction of marine big data; flexible pipelines and marine and umbilical cables
Special Issues, Collections and Topics in MDPI journals
Dr. Weidong Ruan

E-Mail Website
Guest Editor
College of Civil Engineering, Zhejiang University of Technology, Zhejiang, China
Interests: subsea pipelines and risers; flexible pipe and umbilical cables; offshore pipeline laying
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With the continuous development of ocean resources, marine slender structures play crucial roles in the offshore industry. Flexible risers and pipelines have both been widely used for the subsea energy transportation with the rapid development of subsea engineering technology, and they are designed as fluid transportation tools between offshore production units for the conventional fuels industry. They are considered to be an efficient solution in terms of technical and economic performance due to their easy and fast laying procedure, durability and recoverability. As the design of flexible risers and pipelines continue to pose opportunities and challenges due to harsh marine environments, many researchers and engineers keep on exploring and advancing new design and analysis methods for flexible risers and pipelines. This Special Issue will focus on covering these topics to address the developments in the field.

Prof. Dr. Yong Bai
Dr. Weidong Ruan
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Journal of Marine Science and Engineering is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • offshore risers, pipelines and moorings
  • flexible pipes and umbilical cables
  • section design
  • installation technique
  • dynamics response
  • fatigue analysis
  • structure stability and safety
  • structural analysis and optimization
  • subsea engineering and polar engineering
  • pipe–soil interaction

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Published Papers (2 papers)

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Research

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29 pages, 9684 KiB  
Article
Decoupled Analysis of a Multi-Layer Flexible Pipeline Buried in Clay Subjected to Large Lateral Soil Displacement
by Eduardo Ribeiro Malta, Xiaoyu Dong and Hodjat Shiri
J. Mar. Sci. Eng. 2024, 12(7), 1238; https://doi.org/10.3390/jmse12071238 - 22 Jul 2024
Viewed by 768
Abstract
Multilayered flexible subsea pipelines may experience significant lateral movements due to manmade and environmental geohazards. These pipelines incorporate several structural and protective layers to resist different loads, and may require additional protection such as trenching, rock placement, or burial. In practice, simplifications are [...] Read more.
Multilayered flexible subsea pipelines may experience significant lateral movements due to manmade and environmental geohazards. These pipelines incorporate several structural and protective layers to resist different loads, and may require additional protection such as trenching, rock placement, or burial. In practice, simplifications are considered due to the complexities and uncertainties involved in the multi-layer pipe structure and the surrounding soil, compromising the pipe structure or the soil behavior. These simplifications are applied either on the pipe by assuming a rigid section or on the soil by representing it as elastic springs, which may result in inaccuracies. This study proposes a decoupled methodology combining the Coupled Eulerian–Lagrangian (CEL) model for soil displacement with a small-strain finite element analysis of the flexible pipe. This approach aims to accurately capture cross-sectional deformations and local stresses due to soil movement while maintaining reasonable computational effort. A parametric analysis was conducted to assess the impact of several variables on failure risk. The deformed cross-section was then used for a collapse analysis to determine critical loads at maximum operational depth. The study showed that modeling parameters such as soil strength and internal diameter might significantly influence pipe failure and the risk of collapse. Full article
(This article belongs to the Special Issue Advanced Research in Flexible Riser and Pipelines)
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Review

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28 pages, 6490 KiB  
Review
A Review on the Recent Process of Lazy Wave Risers
by Weidong Ruan, Chengcheng Zhou, Hongyu Yang, Zhi Wang, Bo Sun and Yong Bai
J. Mar. Sci. Eng. 2024, 12(11), 2000; https://doi.org/10.3390/jmse12112000 - 6 Nov 2024
Viewed by 455
Abstract
Lazy wave risers (LWRs) are designed with equidistant buoyancy blocks attached in the lower half of the riser, allowing the riser to take on an arch shape under the buoyancy forces provided by buoyancy blocks. This arch configuration can provide flexibility to the [...] Read more.
Lazy wave risers (LWRs) are designed with equidistant buoyancy blocks attached in the lower half of the riser, allowing the riser to take on an arch shape under the buoyancy forces provided by buoyancy blocks. This arch configuration can provide flexibility to the LWR arrangement and effectively isolate the dynamic responses between the offshore floating structure and the riser’s touchdown zone (TDZ). Its design and application aim to address the issues of dynamic response and fatigue damage that traditional steel catenary risers (SCRs) face in deep water and complex marine environments. Given that research on the LWRs in the field of ocean engineering is not sufficiently abundant, the structural characteristics, hydrodynamic loads, global responses, fatigue damage assessment, and structural optimization progress of LWRs are systematically reviewed in this paper to provide references for researchers in related fields. Among these topics, the global response of LWRs is the main point of this review. This section details the theoretical analysis and numerical modeling methods employed in the study of LWRs’ global response, explores the research advancements in the vortex-induced vibration (VIV) related to LWRs, and discusses corresponding experimental studies. Finally, the installation, transfer, and repair processes of LWRs are investigated. Additionally, the importance of leveraging advanced technologies from other fields and combining them with current advanced algorithms is emphasized in efforts to assess fatigue damage and optimize the structures of LWRs, ultimately achieving complementary advantages. Full article
(This article belongs to the Special Issue Advanced Research in Flexible Riser and Pipelines)
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