Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
2.8
2.744
Journals
JMSE
Special Issues
Hydrodynamics and Mooring Analysis of Floating Structures
share announcement

Special Issue "Hydrodynamics and Mooring Analysis of Floating 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: 5 May 2023 | Viewed by 7223

Special Issue Editors

Dr. Shan Wang

E-Mail Website
Guest Editor
Centre for Marine Technology and Ocean Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portuga
Interests: slamming; mooring analysis; ship vibration; fluid and structure interaction; hydroelasticity
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Carlos Guedes Soares

E-Mail Website
Guest Editor
Centre for Marine Technology and Ocean Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portuga
Interests: ship dynamics; weather forecast; onboard monitoring systems
Special Issues, Collections and Topics in MDPI journals
Dr. Philipp R. Thies

E-Mail Website
Guest Editor
Renewable Energy, University of Exeter, Penryn, Cornwall TR10 9FE, UK
Interests: reliability engineering; component testing; offshore renewables; hydrodynamic modeling; innovative mooring systems
Prof. Dr. Yushun Lian

E-Mail Website
Guest Editor
College of Harbour, Harbor Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China
Interests: mooring and anchor technology for ocean structures; wave energy converters; wind farms; marine ranching; fiber rope for space elevator; mechanical behaviors of fiber ropes

Special Issue Information

Dear Colleagues,

Current research and development activities for a range of floating offshore structures are being developed to support the world's energy and resource requirements. Understanding the fundamental hydrodynamic forces in the offshore environment is crucial to the success of future projects. Not only are floating platforms subject to loading from ocean waves, but also increased motion due to the wave–body interactions.

There is a variety of offshore structures, including renewable energy devices and aquaculture installations that require mooring systems to be kept in position. These floating structures are continuously subjected to environmental loadings from waves, currents, wind, etc. The motion response of floating structures is of great concern in marine engineering and in design of moorings for offshore structures. The dynamic nature of wave loads, and the non-linear response of moored structures is a complex problem. In addition, in order to develop a floating aquaculture with a mooring system which could meet global demand, increasing the cultivation capacity for fish production is also a priority. Designing floating net cages and mooring systems is of great concern to the marine aquaculture industry due to the potential structural failures in waves and currents during storm events.

To understand the hydrodynamics of floating structures with moorings, researchers have developed and applied several distinct approaches, including but not limited to model tests, numerical modelling based on potential-flow theory and computational fluid dynamics. The present Special Issue of the Journal of Marine Science and Engineering covers a broad scope of hydrodynamics and a mooring analysis of various floating structures. We encourage the submission of high-quality papers in the following areas:

  • Hydrodynamics of floating bodies;
  • Wave-induced loads on floating bodies;
  • Innovative mooring design and analysis;
  • Optimization of floating renewable energy devices;
  • Offshore platforms;
  • Numerical solutions;
  • Computational fluid dynamics;
  • Model tests;
  • Reliability analysis;
  • Extreme response;
  • Offshore aquaculture systems.

Dr. Shan Wang
Prof. Dr. Carlos Guedes Soares
Dr. Philipp R. Thies
Prof. Dr. Yushun Lian
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 2200 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

  • hydrodynamics
  • mooring dynamics
  • offshore platforms
  • offshore renewable energy
  • renewable energy devices
  • mooring reliability analysis
  • synthetic moorings
  • floating aquaculture
  • floating wind
  • floating tidal
  • floating wave energy

Published Papers (5 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

get_app
Article
Dynamic Response of Deep-Sea Trawl System during Towing Process
by
Dapeng Zhang
,
Bowen Zhao
,
Keqiang Zhu
and
Haoyu Jiang
J. Mar. Sci. Eng. 2023, 11(1), 145; https://doi.org/10.3390/jmse11010145 - 07 Jan 2023
Viewed by 336
Abstract
The trawl system plays an irreplaceable role in deep-sea fishing. In the towing process of the trawl system, many complex mechanical phenomena occurs, so it is necessary to analyze the dynamic response of the deep-sea trawl system during the towing process. In this [...] Read more.
The trawl system plays an irreplaceable role in deep-sea fishing. In the towing process of the trawl system, many complex mechanical phenomena occurs, so it is necessary to analyze the dynamic response of the deep-sea trawl system during the towing process. In this paper, an equivalent mathematical model for predicating the movement of the ocean trawl system is established based on the equivalent net theory. In the proposed method, the lumped mass method is used to simulate the towed cable and some lines with hydrodynamic characteristics are used to simulate the fishing net. The effects of towing speeds on the dynamic characteristics of a rigid truss trawl system and a flexible trawl system during straight-line towing and rotation towing are studied. The results show that it is possible to simulate trawl motion, and the trawling process is well-presented using this equivalent mathematical model. The disadvantage of this method is also obvious, that is, it cannot simulate trawls with a large number of meshes because the proliferation of mesh numbers can lead to difficult computational convergence. The results also demonstrate that during straight-line towing, the higher the speed, the greater the tension of the cable. Due to the rigid truss, the shape of the rigid truss trawl under different towing speeds is not much different, while the shape of the flexible trawl system changes greatly. During rotating towing, the tension of the cable changes abruptly in the initial stage, and then fluctuates periodically in the time domain. With the increase of towing speed, the overall outward floating distance of the trawl increases gradually. This study has a certain reference and guiding role for deep-sea fishing operations. Full article
(This article belongs to the Special Issue Hydrodynamics and Mooring Analysis of Floating Structures)
►▼ Show Figures

Figure 1

get_app
Article
Dynamic Response of a SPAR-Type Floating Wind Turbine Foundation with Taut Mooring System
by
Gong Xiang
,
Xianbo Xiang
and
Xiaochuan Yu
J. Mar. Sci. Eng. 2022, 10(12), 1907; https://doi.org/10.3390/jmse10121907 - 05 Dec 2022
Cited by 1 | Viewed by 649
Abstract
Compared with the traditional catenary or semi-taut mooring lines, the taut mooring system is more advantageous in many aspects, such as reduction of mooring line loads, erosion and fatigue damage during the powering productions of the floating wind turbines. This paper presents a [...] Read more.
Compared with the traditional catenary or semi-taut mooring lines, the taut mooring system is more advantageous in many aspects, such as reduction of mooring line loads, erosion and fatigue damage during the powering productions of the floating wind turbines. This paper presents a taut mooring system made of synthetic fiber mooring lines, which can experience large elongations for a spar-type floating wind turbine. A finite element method (FEM)-based tensile mooring line model is proposed to study the mooring statics and dynamics of the floating wind turbine. A time domain modelling method coupled with the developed mooring line model is adopted to study the dynamics of a spar-type floating wind turbine foundation moored by the taut mooring system under regular waves. A systematic dynamic response and structural analysis are conducted based on variations in the mooring length and pretension. Additionally, comparative performance analyses are investigated for two mooring configurations with different numbers of mooring lines: two-point and three-point taut mooring system. It is found that factors, such as mooring length, pretension and the number of mooring lines, have significant impact on the in-plane and out-of-plane motion responses of the foundation. Full article
(This article belongs to the Special Issue Hydrodynamics and Mooring Analysis of Floating Structures)
►▼ Show Figures

Figure 1

get_app
Article
Numerical Study on the Mooring Force in an Offshore Fish Cage Array
by
Zhongchi Liu
,
Shan Wang
and
C. Guedes Soares
J. Mar. Sci. Eng. 2022, 10(3), 331; https://doi.org/10.3390/jmse10030331 - 26 Feb 2022
Cited by 4 | Viewed by 1627
Abstract
The mooring force in a fish cage array subjected to currents and waves is investigated using the finite element method. Firstly, the numerical model of a fish cage array with six gravity cages is built by Ansys/APDL. Collars and bottom rings are simulated [...] Read more.
The mooring force in a fish cage array subjected to currents and waves is investigated using the finite element method. Firstly, the numerical model of a fish cage array with six gravity cages is built by Ansys/APDL. Collars and bottom rings are simulated with pipe and beam elements while the rest structure is simulated with link elements, including the net and mooring cables. Thus, the weight and hydrodynamic load on the cables can be considered. The initial shape of the mooring ropes is calculated based on mooring dynamics. Since each component is a slender structure in the cage array, the Morison equation is used to calculate the hydrodynamic load. Secondly, the mooring forces are assessed for the system in different sea states. The locations of the maximum mooring force on different parts in the mooring system are found. The mean values and amplitudes of maximum mooring forces on different parts are calculated. The main ropes have the maximum mooring forces under all sea states. The mean values of the maximum mooring forces increase with the current velocity and wave height. When the attack angle is 0° and 90°, the two adjacent bridle ropes do not play the role of pulling the cage together. One is pulled tight and the other one is slack. Full article
(This article belongs to the Special Issue Hydrodynamics and Mooring Analysis of Floating Structures)
►▼ Show Figures

Figure 1

get_app
Article
Hydrodynamic Performance of a Multi-Module Three-Cylinder Floating Breakwater System under the Influence of Reefs: A 3D Experimental Study
by
Jianting Guo
,
Yongbin Zhang
,
Xiangqian Bian
and
Sheng Xu
J. Mar. Sci. Eng. 2021, 9(12), 1364; https://doi.org/10.3390/jmse9121364 - 02 Dec 2021
Viewed by 1171
Abstract
As the technical and theoretical research of floating breakwaters is becoming increasingly mature, the floating breakwaters are now being utilized, especially in offshore reefs. Therefore, it is of practical significance to study the hydrodynamic performance of a multi-module floating breakwater system under the [...] Read more.
As the technical and theoretical research of floating breakwaters is becoming increasingly mature, the floating breakwaters are now being utilized, especially in offshore reefs. Therefore, it is of practical significance to study the hydrodynamic performance of a multi-module floating breakwater system under the influence of reefs. In this study, a 3D model experiment was carried out on a system consisting of eight three-cylinder floating breakwater modules under the influence of reefs. A wave attenuation mesh cage was incorporated at the bottom of the model. The floating breakwater system was slack-moored in its equilibrium position, and each module was connected by elastic connectors. The reefs were modeled on a bathymetric map of existing reefs in the East China Sea. In this experiment, the wave transmission coefficients, motion responses, and mooring forces of the floating breakwater system were measured. The results showed that the three-cylinder floating breakwater in the beam waves (β = 90°) has excellent wave attenuating performance under the influence of reefs, especially for short-period waves. However, under the influence of the reef reflection wave and the shallow water effect, the motion responses in the three main stress directions of the floating breakwater were large, and there was some surge and pitch motion. Under the influence of the aggregation and superposition of reflected waves on both sides of the reefs, the peak mooring forces in the middle position of the floating breakwater system were the largest at large wave height. The three-cylinder floating breakwater exhibited satisfactory hydrodynamic performance under the influence of reefs. It has broad application prospects in offshore reefs. Full article
(This article belongs to the Special Issue Hydrodynamics and Mooring Analysis of Floating Structures)
►▼ Show Figures

Figure 1

get_app
Article
Design and Analysis of a Mooring System for a Wave Energy Converter
by
Francesco Depalo
,
Shan Wang
,
Sheng Xu
and
C. Guedes Soares
J. Mar. Sci. Eng. 2021, 9(7), 782; https://doi.org/10.3390/jmse9070782 - 19 Jul 2021
Cited by 4 | Viewed by 2863
Abstract
The objective of this work is to develop an efficient method to carry out the preliminary design of the mooring system for a wave energy converter. A practical mooring design procedure is applied to a specific case of study, and it can be [...] Read more.
The objective of this work is to develop an efficient method to carry out the preliminary design of the mooring system for a wave energy converter. A practical mooring design procedure is applied to a specific case of study, and it can be replicated for other cases. Firstly, the static analysis is performed for a configuration with three mooring cables with different pre-tensions on fairlead, diameters of the cables, and materials. Based on these configurations from the static analysis, a quasi-static analysis is carried out in the frequency domain and a preliminary design is conducted according to DNV rules. Then, a 3-h dynamic analysis in the time domain is performed on several selected configurations, considering the same environmental conditions in the quasi-static analysis using the finite element method. Extreme dynamic responses of the system, such as extreme surge motion and mooring tensions, are estimated by the global maximum method, which is performed by fitting 20 individual maximum observations by Gumbel distribution. The quasi-static method is validated by comparing the results of extreme tension and displacement with the coupled time domain analysis. In addition, the influence of pre-tensions and cable diameters on the static and dynamic responses of the mooring system are discussed. Full article
(This article belongs to the Special Issue Hydrodynamics and Mooring Analysis of Floating Structures)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-5
Back to TopTop