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Advancements in Renewable Energy: Construction and Maintenance of Offshore Wind...
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Advancements in Renewable Energy: Construction and Maintenance of Offshore Wind Farms

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

Deadline for manuscript submissions: closed (28 February 2025) | Viewed by 6008

Special Issue Editors

Dr. Chen Wang

E-Mail Website
Guest Editor
Department of Geotechnical Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
Interests: marine geotechnical engineering; scour and erosion; deep-water foundation; disaster prevention and resilience; intelligent infrastructure; underground space
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Fayun Liang

E-Mail Website
Guest Editor
Department of Geotechnical Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
Interests: offshore pile foundation; geotechnical earthquake engineering; soft soil engineering; deep-water foundation; scour and erosion
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Xiong (Bill) Yu

E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
Interests: adaptive building materials; circularity
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Energy demand and global climate change have become two of the most significant challenges to human society. This situation forces researchers to develop sustainable and renewable energy resources. Wind energy, a clean, plentiful, and renewable alternative, has promoted a rapid increase in both the installed capacity and the number of wind turbines in recent years. As wind farms move into deeper seas, there continue to be challenges to overcome during construction and maintenance. 

This Special Edition of JMSE will focus on the state of practice and identify current, emerging, and future geotechnical and structural challenges associated with the construction and maintenance of wind farms. The topics are expected to fall into the following areas: 

  • Installation—monitoring, instrumentation, risk management, protections, and case studies;
  • Analysis and design—foundation concepts, design optimization, and standards;
  • Lifetime performance—monitoring, behaviors, digital twins, repair, and disposal.

Dr. Chen Wang
Prof. Dr. Fayun Liang
Prof. Dr. Xiong (Bill) Yu
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

  • renewable energy
  • offshore wind farms
  • foundation
  • construction
  • maintenance

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (4 papers)

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Research

16 pages, 2383 KiB  
Article
Risk Identification and Safety Evaluation of Offshore Wind Power Submarine Cable Construction
by Hui Huang, Qiang Zhang, Hao Xu, Zhenming Li, Xinjiao Tian, Shuhao Fang, Juan Zheng, Enna Zhang and Dingding Yang
J. Mar. Sci. Eng. 2024, 12(10), 1718; https://doi.org/10.3390/jmse12101718 - 30 Sep 2024
Viewed by 1362
Abstract
To mitigate accidents in submarine cable construction within the rapidly expanding offshore wind power sector, this study employed the analytic hierarchy process (AHP) and risk matrix method (LS) to assess the risks associated with identified factors. Based on project research and expert consultations, [...] Read more.
To mitigate accidents in submarine cable construction within the rapidly expanding offshore wind power sector, this study employed the analytic hierarchy process (AHP) and risk matrix method (LS) to assess the risks associated with identified factors. Based on project research and expert consultations, five primary and twenty-two secondary risk factors were identified. AHP was utilized to rank the primary risk factors by severity, probability, and detection difficulty, with the highest risk being the environmental impact, followed by third-party destruction and worker error. LS was applied to rank the secondary risk factors by likelihood and severity, with the highest risks being complex submarine topography, low underwater visibility, and fishing operations. The study proposes risk reduction measures based on these evaluations and offers methodological guidance for improving construction safety in similar enterprises. Full article
(This article belongs to the Special Issue Advancements in Renewable Energy: Construction and Maintenance of Offshore Wind Farms)
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19 pages, 3429 KiB  
Article
Experimental Study of Negative Skin Friction of Pile Group Foundations for Offshore Wind Turbines on Artificial Islands
by Yeyu Yan, Guoliang Dai, Zhiwei Chen, Tao Hu, Weiming Gong and Chenchen Shi
J. Mar. Sci. Eng. 2024, 12(8), 1386; https://doi.org/10.3390/jmse12081386 - 13 Aug 2024
Cited by 2 | Viewed by 1511
Abstract
Constructing offshore wind turbines on artificial islands is considered a viable option, but negative skin friction (NSF) is a significant adverse factor that cannot be ignored. The NSF adversely affects the bearing capacity of pile foundations. Currently, design methods for studying the impact [...] Read more.
Constructing offshore wind turbines on artificial islands is considered a viable option, but negative skin friction (NSF) is a significant adverse factor that cannot be ignored. The NSF adversely affects the bearing capacity of pile foundations. Currently, design methods for studying the impact of NSF group effects mainly rely on empirical approaches. Moreover, existing experimental studies do not simulate the NSF experienced by offshore wind turbine pile groups on artificial islands. In order to further explore the impact of pile group effects on NSF experienced by offshore wind turbine pile foundations on artificial islands, this study conducted indoor model tests on single piles and 3 × 3 rectangular pile groups in sandy soil under uniformly distributed loading on surrounding soil. The experiment measured the settlement of piles at various positions within single piles and rectangular pile groups, as well as the settlement of the soil surrounding the piles and the NSF. Through calculations, the experiment determined the neutral points and NSF group effect coefficients for each pile. The results indicate that densely spaced pile groups are advantageous in reducing settlement of the surrounding soil, thereby mitigating the adverse effects of NSF. Due to the influence of pile group effects, different positions within the group experience varying degrees of NSF. Consequently, in practical engineering applications, settlement of both the pile groups and the surrounding soil should be calculated separately. Furthermore, design considerations for the uplift forces and neutral points of piles at different positions within the pile group should adhere to distinct standards. Full article
(This article belongs to the Special Issue Advancements in Renewable Energy: Construction and Maintenance of Offshore Wind Farms)
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24 pages, 11334 KiB  
Article
Combined Seismic and Scoured Numerical Model for Bucket-Supported Offshore Wind Turbines
by Xiaojing Jia, Fayun Liang, Panpan Shen and Hao Zhang
J. Mar. Sci. Eng. 2024, 12(6), 892; https://doi.org/10.3390/jmse12060892 - 27 May 2024
Cited by 4 | Viewed by 1179
Abstract
Numerous offshore wind turbines (OWTs) with bucket foundations have been installed in seismic regions. Compared to the relative development of monopiles (widely installed), seismic design guidelines for bucket-supported OWTs still need to be developed. Moreover, scour around bucket foundations induced by water–current actions [...] Read more.
Numerous offshore wind turbines (OWTs) with bucket foundations have been installed in seismic regions. Compared to the relative development of monopiles (widely installed), seismic design guidelines for bucket-supported OWTs still need to be developed. Moreover, scour around bucket foundations induced by water–current actions also creates more challenges for the seismic design of OWTs. In this study, a simplified seismic analysis method is proposed that incorporates the soil–structure interaction (SSI) for the preliminary design of scoured bucket-supported OWTs, aiming to balance accuracy and efficiency. The dynamic SSI effects are represented using lumped parameter models (LPMs), which are developed by fitting impedance functions of the soil–bucket foundation obtained from the four-spring Winkler model. The water–structure interaction is also considered by the added mass in seismic analysis. Based on the OpenSees 3.3.0 platform, an integral model is established and validated using the three-dimensional finite element method. The results indicate that the bucket-supported OWT demonstrates greater dynamic impedance and first-order natural frequency compared to the monopile-supported OWT, which has an increased seismic response. Seismic spectral characteristics and intensities also play an important role in the responses. Additionally, scour can change the bucket impedance functions and the frequency characteristics of the OWT system, leading to a significant alteration in the seismic response. Scour effects may be advantageous or disadvantageous, depending on the spectral characteristics of seismic excitations. These findings provide insights into the seismic response of bucket-supported OWTs under scoured conditions. Full article
(This article belongs to the Special Issue Advancements in Renewable Energy: Construction and Maintenance of Offshore Wind Farms)
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17 pages, 7115 KiB  
Article
Elastoplastic Solution of Cylindrical Cavity Expansion in Unsaturated Offshore Island Soil Considering Anisotropy
by Jifei Cui, Yanhao Jin, Yingjie Jing and Yu Lu
J. Mar. Sci. Eng. 2024, 12(2), 308; https://doi.org/10.3390/jmse12020308 - 9 Feb 2024
Cited by 9 | Viewed by 1142
Abstract
An elastoplastic analysis scheme for the cylindrical cavity expansion in offshore islands unsaturated soils considering anisotropy is established. The hydraulic properties and anisotropy caused by stress of unsaturated soils are coupled in an elastoplastic constitutive matrix for unsaturated soil to obtain the governing [...] Read more.
An elastoplastic analysis scheme for the cylindrical cavity expansion in offshore islands unsaturated soils considering anisotropy is established. The hydraulic properties and anisotropy caused by stress of unsaturated soils are coupled in an elastoplastic constitutive matrix for unsaturated soil to obtain the governing equations for the cylindrical cavity expansion problem, with an analytical solution that utilizes the original hydro-mechanical state of the soil as the initial conditions. Through a comparative analysis with other analytical solutions, the effectiveness of the new solution is verified. Moreover, the swelling response of the cylindrical cavity expansion in unsaturated soils is examined by systematically analyzing different parameters of the surrounding soil. The findings reveal that the development and rate of anisotropy in normal consolidated soil and over-consolidated soil exert a significant impact on the soil’s mechanical characteristics. Nevertheless, the alteration in the model constant h has little effect on the soil’s mechanical characteristics. The analytical solution introduces anisotropy and broadens the expansion theory of unsaturated soils to yield a more comprehensive theoretical framework for the comprehensive analysis of offshore islands’ unsaturated soils. Full article
(This article belongs to the Special Issue Advancements in Renewable Energy: Construction and Maintenance of Offshore Wind Farms)
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