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: 30 April 2024 | Viewed by 2932

Special Issue Editors

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
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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
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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

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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

Published Papers (2 papers)

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Research

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
Viewed by 742
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 2 | Viewed by 1516
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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