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New Era in Offshore Wind Energy
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New Era in Offshore Wind Energy

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: 31 August 2025 | Viewed by 7097

Special Issue Editors

Dr. Wei Shi

E-Mail Website
Guest Editor
1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
2. Research Institute, Dalian University of Technology in Shenzhen, Shenzhen 518057, China
Interests: offshore wind energy; drivetrain dynamics; wave energy; floating wind turbine; hydrodynamics
Special Issues, Collections and Topics in MDPI journals
Dr. Constantine Michailides

E-Mail Website
Guest Editor
Department of Civil Engineering, International Hellenic University (IHU), Thessaloniki, Greece
Interests: wave-structure interaction; offshore wind turbines; wave energy converters; marine civil engineering; offshore and coastal structures; hydrodynamics; marine hydraulics; monitoring technologies in marine engineering
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jianhua Zhang

E-Mail Website
Guest Editor
College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China
Interests: offshore wind turbines; offshore floating photovoltaic systems; offshore platform structures; structural dynamics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Offshore wind turbine (OWT) technology is the leading technology in the offshore renewable energy sector, which has the greatest potential of developing commercially and becoming the backbone of the energy system by 2030 and 2050, respectively. Up to now, the use of fixed-bottom OWTs dominates against the use of floating OWTs (FOWTs); in the forthcoming years both technologies will be further developed and expanded together. In previous years, novel technologies were already developed in order to lower the levelized cost of energy and to efficiently face engineering challenges and uncertainties. Significant progress has been generated so far to facilitate the application of related theoretical designs in engineering practice. A new era in offshore wind energy technology, related to the analysis, design, and structural health monitoring of OWTs, is the core of this Special Issue.

Dr. Wei Shi
Dr. Constantine Michailides
Prof. Dr. Jianhua Zhang
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

  • fixed-bottom wind turbines
  • floating offshore wind turbines
  • numerical analysis and wave–structure interaction
  • experimental testing
  • offshore wind turbines’ structural health monitoring
  • mooring lines design
  • novel materials and concepts
  • combined wind-wave energy systems
  • computational fluid dynamics

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Published Papers (4 papers)

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Research

37 pages, 25343 KiB  
Article
Experimental and Numerical Study of Suspended Inter-Array Cable Configurations for Floating Offshore Wind Farm
by Di-Rong Li, Yu-Shiou Su and Ray-Yeng Yang
J. Mar. Sci. Eng. 2024, 12(6), 853; https://doi.org/10.3390/jmse12060853 - 21 May 2024
Cited by 1 | Viewed by 1270
Abstract
The present study evaluates the feasibility of using a fully suspended inter-array cable system for an offshore wind farm. It includes both numerical simulations and a scaled-down experiment, conducted at a 1:49 scale, to validate the numerical results. To achieve the goal, a [...] Read more.
The present study evaluates the feasibility of using a fully suspended inter-array cable system for an offshore wind farm. It includes both numerical simulations and a scaled-down experiment, conducted at a 1:49 scale, to validate the numerical results. To achieve the goal, a 15 MW floating offshore wind turbine (FOWT) and a floating offshore substation (FOSS) are involved to simulate the wind farm array. This study incorporates the 50-year return period conditions of the Taiwan Hsinchu offshore area, which has a water depth of about 100 m, to validate the specifications related to the platform motion and mooring line tension. Additionally, an analysis of the tension, curvature, and fatigue damage of the dynamic cable system is discussed in this research. Because a fully suspended cable is a relatively new concept and may be more frequently considered in a deeper water depth area, numerical simulation software Orcina Orcaflex 11.4 has been chosen to conduct the fully coupled simulation, determining whether the fully suspended cable system could effectively withstand the challenges posed by extreme sea conditions. This is due to the reason that a fully suspended cable would occupy a larger space in the ocean, which may pose a risk by influencing the navigation of the vessels. Therefore, the cable laying depth under normal sea states is also discussed to evaluate the influence over vessel navigation. This study also collects the long-term environmental data from the Central Weather Bureau, Taiwan, to calculate the accumulative cable fatigue damage under different sea states. To integrate the results, this research applies fitness parameters to evaluate the feasibility of each cable configuration. Covering the cable performance under extreme sea states and regular operating sea states offers valuable insights for applications in ocean engineering. Full article
(This article belongs to the Special Issue New Era in Offshore Wind Energy)
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26 pages, 10832 KiB  
Article
Numerical Investigation of Local Scour Protection around the Foundation of an Offshore Wind Turbine
by Ning Zhang, Bingqian Yu, Shiyang Yin, Caixia Guo, Jianhua Zhang, Fanchao Kong, Weikun Zhai and Guodong Qiu
J. Mar. Sci. Eng. 2024, 12(5), 692; https://doi.org/10.3390/jmse12050692 - 23 Apr 2024
Viewed by 943
Abstract
The pile foundations of offshore wind turbines face serious problems from scour damage. This study takes offshore wind turbine monopile foundations as the research object and proposes an innovative anti-scour device for the protection net. A numerical simulation research method based on CFD-DEM [...] Read more.
The pile foundations of offshore wind turbines face serious problems from scour damage. This study takes offshore wind turbine monopile foundations as the research object and proposes an innovative anti-scour device for the protection net. A numerical simulation research method based on CFD-DEM was used to model the local scour of the pile foundation and protection net. The validity of the numerical model was verified by comparing the simulation results of the local scour of the pile foundation under the condition of clear water scour and the results of the flume test. The permeability rate was defined to characterize the overwatering of the protection net, and numerical simulations were performed for protection nets with permeability in the range of 0.681 to 0.802. The flow field perturbations, changes in washout pit morphology, and changes in washout depth development due to the protective netting were also analyzed. It was found that the protection net can effectively reduce the flow velocity around the pile, cut down the intensity of the submerged water in front of the pile, and provide scouring protection. Finally, the analysis and summary of the protection efficiency of the different protection nets revealed that the protection efficiency within the nets was consistently the highest. On the outside of the net, the protection efficiency is poor at a small permeability rate but increases with an increasing permeability rate. Full article
(This article belongs to the Special Issue New Era in Offshore Wind Energy)
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19 pages, 10331 KiB  
Article
Ice-Induced Vibration Analysis of Offshore Platform Structures Based on Cohesive Element Method
by Jianhua Zhang, Xiaoyu Wang, Ke Sun, Yueqi Lai, Dianwei Gao, Won-Hee Kang, Bin Wang and Bingjun Wang
J. Mar. Sci. Eng. 2024, 12(1), 28; https://doi.org/10.3390/jmse12010028 - 21 Dec 2023
Cited by 1 | Viewed by 1324
Abstract
This study conducted ice-induced vibration analysis on offshore platform structures using the cohesive element method (CEM). The efficacy of this method in simulating the interaction between sea ice and the platform structure is verified by comparing it with the Hamburg Ship Modeling Pool [...] Read more.
This study conducted ice-induced vibration analysis on offshore platform structures using the cohesive element method (CEM). The efficacy of this method in simulating the interaction between sea ice and the platform structure is verified by comparing it with the Hamburg Ship Modeling Pool (HSVA) ice-breaking experiment. Subsequently, the vibration response of a sea-ice-jacket platform model is investigated under both unprotected conditions and with the presence of ice-breaking cones. The findings reveal that the motion response of offshore platforms exhibits a positive correlation with the impact velocity of the ice, while the sensitivity of this impact is found to be minimal. Furthermore, the influence of different ice directions on the vibration response of offshore platforms is significant, and the shielding effect has an important impact on the platform’s response. Notably, offshore platforms equipped with 52.5-degree cones demonstrate the most effective vibration reduction, reducing the maximum acceleration by 63% compared to unprotected configurations. It is worth mentioning that as the cone angle increases, the corresponding ice-breaking cone undergoes higher load-bearing. Full article
(This article belongs to the Special Issue New Era in Offshore Wind Energy)
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15 pages, 6968 KiB  
Article
Structural Effects of Mass Distributions in a Floating Photovoltaic Power Plant
by Chun Bao Li and Joonmo Choung
J. Mar. Sci. Eng. 2022, 10(11), 1738; https://doi.org/10.3390/jmse10111738 - 13 Nov 2022
Cited by 5 | Viewed by 2083
Abstract
This study deals with a solar photovoltaic demonstration project composed of four types of sub-plants that will be operated in the Saemangeum Seawall coast. The project aimed to investigate the most efficient sub-plant types. Hydrodynamic analyses were undertaken to obtain the loads exerted [...] Read more.
This study deals with a solar photovoltaic demonstration project composed of four types of sub-plants that will be operated in the Saemangeum Seawall coast. The project aimed to investigate the most efficient sub-plant types. Hydrodynamic analyses were undertaken to obtain the loads exerted on the floating photovoltaic power plants on which two kinds of frame structures supported shed- and gable-type photovoltaic panels, producing the four types of sub-plants composed of three floaters. Hydrodynamic interactions between the floaters were considered because floaters were linked with hinge joints. The pressure and acceleration response operator amplitudes were transferred to the finite element analysis model using an in-house code. Because each sub-plant had a different mass and second moments of mass, it was found that huge stresses had been retained in hinge joints. After the masses in the twelve floaters were evenly distributed, the maximum stresses were reduced so that they were less than material yield strengths. There were larger stresses in the POSCO (Pohang Iron and Steel Company) magnesium alloy coating (POSMAC) frames than in the fiber-reinforced plastic (FRP) frames because the POSMAC frame had an open-channel section. It is concluded that weight in each floating unit should be evenly controlled if hinged joints are used to link the floaters. Full article
(This article belongs to the Special Issue New Era in Offshore Wind Energy)
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