Advances in Floating Offshore Structures

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: closed (15 August 2023) | Viewed by 4376

Special Issue Editors


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Guest Editor
China Ship Scientific Research Center, Wuxi, China
Interests: hydroelasticity and ship mechanics

E-Mail Website
Guest Editor
China Ship Scientific Research Center, Wuxi, China
Interests: hydroelssticity of ships and offshore structures; ocean space utilization
China Ship Scientific Research Center, Wuxi, China
Interests: waves; damping; vibration; hydroealstic

Special Issue Information

Dear Colleagues,

Floating offshore structures play an important role in the exploitation of ocean resources. In recent years, the new concept of floating offshore structures has been proposed. Indeed, some of these structures have been designed, constructed, and deployed in deeper water, whether on the slopes of the continental shelves or island seabed bathymetry and in the hostile Arctic seas. This Special Issue aims to provide an overview of the latest research achievements in the scientific investigation and practical application of floating offshore structures, such as VLFS, seabed mining and offshore aquaculture structures. This will primarily involve the following four topics.   

(i) Environmental conditions

We will consider advances in the descriptions of the ocean environment, especially with respect to wave, current and wind, in deep and shallow waters, and ice.

(II) Structural design

General requirements, interpretations and standards used in the design for safety, reliability and serviceability of the floating offshore structures purposes shall be discussed for different ocean space utilizations. Due consideration should be given to the uncertainties in established design methods and modelling techniques for non-conventional floating offshore structures.

(III) Theoretical model and numerical analyses
Advances in the environmental loads from waves, wind, current, ice, slamming, sloshing, green water, weight distribution shall be discussed. Focus should be given to fluid–structure interactiona induced by the large size, seabed bathymetry and structure flexibility. Due consideration should be given to the comparison of simpler and more refined theories, a process which will help to determine the dynamic responses for structures with connectors, mooring systems, etc.

(IV) Experimental and full scale measurement

Advances in experimental and full-scale measurement and in-service monitoring related to uncertainty analysis, experimental techniques, full-field imaging and sensor systems, big data applications and correlations between model, full-scale and numerical datasets will be covered.

Prof. Dr. Yousheng Wu
Dr. Chao Tian
Dr. Jun Ding
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

  • hydroelasticity
  • fluid–structure interaction
  • multi-body hydrodynamics
  • seabed bathymetry
  • mooring system
  • shallow water effect
  • vortex-induced vibration
  • fishing net hydrodynamics
  • experimental methods
  • full-scale measurement technique
  • uncertainty analysis

Published Papers (2 papers)

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Research

21 pages, 9620 KiB  
Article
Hydrodynamics and Wake Flow Analysis of a Floating Twin-Rotor Horizontal Axis Tidal Current Turbine in Roll Motion
by Muyu Zhao, Ying Chen and Jin Jiang
J. Mar. Sci. Eng. 2023, 11(8), 1615; https://doi.org/10.3390/jmse11081615 - 18 Aug 2023
Cited by 1 | Viewed by 825
Abstract
The study of hydrodynamic characteristics of floating double-rotor horizontal axis tidal current turbines (FDHATTs) is of great significance for the development of tidal current energy. In this paper, the effect of roll motion on a FDHATT is investigated using the Computational Fluid Dynamics [...] Read more.
The study of hydrodynamic characteristics of floating double-rotor horizontal axis tidal current turbines (FDHATTs) is of great significance for the development of tidal current energy. In this paper, the effect of roll motion on a FDHATT is investigated using the Computational Fluid Dynamics (CFD) method. The analysis was conducted in the CFD software STAR-CCM+ using the Reynolds-averaged Navier–Stokes method. The effects of different roll periods and tip speed ratios on the power coefficient and thrust coefficient of FDHATT were studied, and then the changes in the vorticity field and velocity field of the turbine wake were analyzed by two-dimensional cross-section and Q criterion. The study indicates that roll motion results in a maximum decrease of 30.76% in the average power coefficient and introduces fluctuations in the instantaneous load. Furthermore, roll motion significantly accelerates the recovery of wake velocity. Different combinations of roll periods and tip speed ratios lead to varying degrees of wake velocity recovery. In the optimal combination, at a position 12 times the rotor diameter downstream, roll motion can recover the wake velocity to 92% of the incoming flow velocity. This represents a 23% improvement compared to the case with no roll motion. Full article
(This article belongs to the Special Issue Advances in Floating Offshore Structures)
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19 pages, 5878 KiB  
Article
Design and Fully Coupled Dynamic Response Analysis of a New Floating Offshore Wind Platform
by Yong Shen, Chuanyi Liu, Weichen Pan, Yajie Li and Xikun Wang
J. Mar. Sci. Eng. 2023, 11(7), 1368; https://doi.org/10.3390/jmse11071368 - 05 Jul 2023
Viewed by 1357
Abstract
Floating offshore wind platform (FOWP) has become the economically favored option for supporting wind turbines in deep waters. It is urgent to propose new concept designs for FOWPs that can be effectively deployed. Additionally, the extensive use of steel in such platforms significantly [...] Read more.
Floating offshore wind platform (FOWP) has become the economically favored option for supporting wind turbines in deep waters. It is urgent to propose new concept designs for FOWPs that can be effectively deployed. Additionally, the extensive use of steel in such platforms significantly escalates costs, necessitating the optimization of steel utilization. Motivated by these challenges, a V-shaped floating semi-submersible platform equipped with NREL 5 MW wind turbine is designed and analyzed based on the potential flow theory and the blade element momentum theory. Fully coupled time-domain simulations are conducted using the F2A program, which couples NREL FAST and ANSYS AQWA via a Dynamic Link Library (DLL), to compare the hydrodynamic performance and stability of the V-shaped floating platform with the original triangle-shaped model of “Fuyao”. Various sea conditions have been considered, including combined wind-wave action and wind-wave-current action at different incidence angles. The results show that the V-shaped floating platform has better economic and hydrodynamic performance (e.g., a reduction of 40.4% and 12.9%, respectively, in pitch and yaw motions, and a 17.4% reduction in maximum mooring tension), but lower stability than its triangle-shaped counterpart. Full article
(This article belongs to the Special Issue Advances in Floating Offshore Structures)
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