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Analysis and Design of Marine Structures
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Analysis and Design of Marine 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 January 2025 | Viewed by 7504

Special Issue Editors

Prof. Dr. Yijun Shen

E-Mail Website
Guest Editor
State Key Laboratory of Marine Resources Utilization in South China Sea, Hainan University, Hainan, China
Interests: deep-sea mining; offshore oil & gas and hydrate development; deep-sea flexible riser design & analysis; deep-sea umbilicals & cables design & analysis; multi-phase flow transportation technology; offshore wind farm and turbine technology; subsea structures & system; fluid and structure coupling & interaction; vortex induced vibration; deep-sea flowline transportation
Dr. Lin Li

E-Mail Website
Guest Editor
Department of Mechanical, Building and Materials Technology, University of Stavanger, 4021 Stavanger, Norway
Interests: dynamic analysis of marine structures; marine operations and installations; design and analysis of aquaculture structures; hydrodynamics on offshore structures; statistical analysis of waves and wave loads

Special Issue Information

Dear Colleagues,

Marine structures, including both floating and fixed offshore platforms, subsea systems, risers, umbilical cables, flowlines and mooring systems, offshore wind farms, ships, etc., have been widely used in marine resource development and offshore oil and gas production. Due to the harsh marine environments and extreme loading conditions, marine structures face technical challenges in terms of service life and associated issues. This Special Issue will focus on the analysis and design of marine structures, covering topics including, but not limited to, the analysis and design of various types of marine structures in offshore and ocean exploration, such as fluid and structure coupling and interaction, flow field characteristics, VIV, structure dynamics and vibration, structural optimum design, defect and failure analysis, risk analysis and fatigue life assessment, numerical analysis, modeling and simulation, the marine structure’s responses to different types of loads such as wind, wave, current and seabed substrates, etc.

We invite authors to publish their latest research findings and technical work in this Special Issue, titled “Analysis and Design of Marine Structures”. All types of manuscripts are welcome.

Prof. Dr. Yijun Shen
Dr. Lin Li
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.

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

Published Papers (6 papers)

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Research

22 pages, 5801 KiB  
Article
Effects on the Potential for Seepage Failure Under a Geotextile Mattress with Floating Plate
by Yehui Zhu, Qiyun Wang, Guokai Wu, Yanhong Li and Liquan Xie
J. Mar. Sci. Eng. 2024, 12(11), 1975; https://doi.org/10.3390/jmse12111975 - 2 Nov 2024
Viewed by 434
Abstract
The geotextile mattress with floating plate (GMFP) is an innovative scour protection device. This study examines the potential for seepage failure under the GMFP, which has been previously documented. The effects of flow velocity and GMFP configuration on the potential for seepage failure [...] Read more.
The geotextile mattress with floating plate (GMFP) is an innovative scour protection device. This study examines the potential for seepage failure under the GMFP, which has been previously documented. The effects of flow velocity and GMFP configuration on the potential for seepage failure were analyzed. The variation pattern of the sloping angle was first revealed in flume tests, and the bed pressure near the GMFP with various configurations in steady currents was thereafter simulated. The average hydraulic gradient across the GMFP was observed to increase with an increase in the Froude number before reaching a plateau, which can be explained by the coupled effects of the rising Froude number and the decreasing sloping angle. The average hydraulic gradient was approximately inversely proportional to the mattress length upstream of the floating plate. With the decreasing mattress length downstream of the floating plate, the average hydraulic gradient initially rose and then declined when the downstream mattress was relatively short. This trend can be associated with the amplification of the vortices in the top vortex zone downstream of the GMFP with the shortened downstream mattress, which pushed the bottom vortex to the leeside. The shortened downstream mattress could increase the risk of overturning and slipping of the GMFP, although the average hydraulic gradient decreased. Full article
(This article belongs to the Special Issue Analysis and Design of Marine Structures)
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26 pages, 18649 KiB  
Article
Theoretical and Numerical Analysis of Ocean Buoy Stability Using Simplified Stability Parameters
by Huiyuan Zheng, Yonghua Chen, Qingkui Liu, Zhigang Zhang, Yunzhou Li and Min Li
J. Mar. Sci. Eng. 2024, 12(6), 966; https://doi.org/10.3390/jmse12060966 - 7 Jun 2024
Viewed by 1172
Abstract
The stability performance of the buoy is an important parameter that should be taken into account when designing marine buoys. This paper introduces a theoretical and numerical analysis method to examine the stability of marine buoys, including analysis of the initial stability and [...] Read more.
The stability performance of the buoy is an important parameter that should be taken into account when designing marine buoys. This paper introduces a theoretical and numerical analysis method to examine the stability of marine buoys, including analysis of the initial stability and large inclination stability by calculating the natural period, metacentric height, static stability, and dynamic stability, deriving the calculation process of the static stability lever in detail to obtain the righting moment, and so on, showing that the designed buoy in this paper has sufficient stability performance with theoretically excellent resistance performance to the wind and waves. Additionally, the hydrodynamic performance of the buoy at different heights is also further analyzed for structural optimization, which concluded that the buoy would have a more balanced stability performance when the buoy’s width-to-height ratio is 0.375–0.5, hoping that the computational model and ideas used in this paper can provide a reference for the theoretical stability analysis and buoy design of other types of buoys. Full article
(This article belongs to the Special Issue Analysis and Design of Marine Structures)
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21 pages, 6086 KiB  
Article
Design and Analysis of a Buoy-Based Cable Seafloor Observatory System Response under Extreme Weather Conditions
by Wenjie Zhou, Yanjun Li, Yulu Zhang, Qingyan Jiang, Dong Chen, Yanzhen Gu and Yuan Lin
J. Mar. Sci. Eng. 2024, 12(6), 889; https://doi.org/10.3390/jmse12060889 - 27 May 2024
Viewed by 911
Abstract
In order to address the requirements of scientific multidisciplinary observation in diverse small-scale regions, we have introduced the Buoy-based Cable Seafloor Observatory System (BCSOS). This system offers a distinct advantage in contexts where the use of shorter cables is feasible, contrasting with the [...] Read more.
In order to address the requirements of scientific multidisciplinary observation in diverse small-scale regions, we have introduced the Buoy-based Cable Seafloor Observatory System (BCSOS). This system offers a distinct advantage in contexts where the use of shorter cables is feasible, contrasting with the lengthy cables typically necessary for conventional observatories. The BCSOS consists of three primary components: the Real-Time Electric Communication (RTEC) Buoy, the Power Information Transmission System (PITS), and the Seafloor Observation Subsystem (SOS). The RTEC Buoy is equipped with instruments for measuring sea surface parameters and serves as a data and power hub. The PITS, comprising a robust EM cable, connects the buoy to the SOS, which houses instruments for seafloor observations. The system is designed for a maximum water depth of 100 m and has an expected lifespan of about 5 years. The BCSOS prototypes were deployed at the Huangqi Peninsula, Fujian Province, and successfully documented the process during Typhoon Doksuri (international code 2305) at the end of July 2023. The recorded data from the BCSOS revealed a significant increase in wave height and period as the storm approached the Huangqi Peninsula. Additionally, the RTEC buoy exhibited a notable response to the large waves. The data analysis revealed a distinct pattern between the buoy response and the direction of wave propagation across various sea conditions, that the buoy’s angular movement in pitch and roll directions follows a regular elliptical distribution corresponding to different wave propagation directions. Upon thorough evaluation, future enhancements to the system are slated to concentrate on refining its design, with a particular emphasis on bolstering stability and enhancing corrosion resistance. These improvements are aimed at cementing the system’s long-term viability and performance within the challenging marine environment. Full article
(This article belongs to the Special Issue Analysis and Design of Marine Structures)
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18 pages, 2677 KiB  
Article
Investigating Fishing Vessel Hydrodynamics by Using EFD and CFD Tools, with Focus on Total Ship Resistance and Its Components
by Sebastian Oyuela, Héctor Rubén Díaz Ojeda, Francisco Pérez Arribas, Alejandro Daniel Otero and Roberto Sosa
J. Mar. Sci. Eng. 2024, 12(4), 622; https://doi.org/10.3390/jmse12040622 - 5 Apr 2024
Cited by 1 | Viewed by 1248
Abstract
The aim of this work is to gain a better understanding of the hydrodynamics of a typical Argentinian fishing vessel in calm water. It is focused on the evaluation of total ship resistance and its components for different draughts. The 1978 ITTC Power [...] Read more.
The aim of this work is to gain a better understanding of the hydrodynamics of a typical Argentinian fishing vessel in calm water. It is focused on the evaluation of total ship resistance and its components for different draughts. The 1978 ITTC Power Prediction method is used to predict total ship resistance from experiments carried out at the University of Buenos Aires towing tank. To conduct a more detailed evaluation of the flow around this hull, numerical studies at model scale are carried out with the open-source code OpenFOAM V10 and validated against experimental results. The Reynolds-Averaged Navier–Stokes (RANS) method together with Volume of Fluid (VOF) are used for the numerical procedure. The validated CFD model not only can provide more detailed information about the ship’s hydrodynamics than the EFD results but also allows for the exploration of the improvement in ship power prediction by using combined CFD-EFD methodologies. This work numerically calculates the form factor by using a double-body configuration and discusses the possibility of combining EFD results with this CFD form factor in order to improve total force prediction for this kind of ships. Full article
(This article belongs to the Special Issue Analysis and Design of Marine Structures)
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23 pages, 4646 KiB  
Article
Statistical Modeling and Applications of Joint Distributions for Significant Wave Height, Spectral Peak Period, and Peak Direction of Propagation: A Case Study in the Norwegian Sea
by Clarissa Pires Vieira Serta, Sverre Haver and Lin Li
J. Mar. Sci. Eng. 2023, 11(12), 2372; https://doi.org/10.3390/jmse11122372 - 15 Dec 2023
Viewed by 1166
Abstract
The estimation of long-term extreme response is a crucial task in the design of marine structures. The target extreme responses are typically defined by annual exceedance probabilities of 10−2 and 10−4. Various approaches can be employed for this purpose, with [...] Read more.
The estimation of long-term extreme response is a crucial task in the design of marine structures. The target extreme responses are typically defined by annual exceedance probabilities of 10−2 and 10−4. Various approaches can be employed for this purpose, with preference given to statistical long-term analysis, which involves aggregating the exceedance probabilities of all potential sea states contributing to the exceedance of the target extremes. A joint model encompassing important metocean parameters such as wind, waves, and current is often necessary. This study specifically focuses on waves and wave-induced responses. In characterizing short-term sea state conditions, significant wave height (Hs), spectral peak period (Tp) and peak direction of propagation (Φp) are identified as the most important sea state characteristics. The objective of this work is to present the results of the joint model for the three sea state parameters, i.e., Hs, Tp and Φp, at an offshore site in the Norwegian Sea. The conditional modeling approach is applied using long-term hindcast data, and different statistical models are discussed for fitting the marginal and conditional distributions. The fitted parameters for all directional sectors are provided, offering a comprehensive representation of the joint model for direct use in long-term response analysis. Two case studies are included to illustrate the application of the fitted joint model in long-term response analyses. The case studies identify the governing wave directions and the most important combinations of short-term sea state characteristics regarding the estimation of long-term extreme responses. Full article
(This article belongs to the Special Issue Analysis and Design of Marine Structures)
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20 pages, 5615 KiB  
Article
Parametric Study on Mooring System Design of Submerged Floating Tunnel under Extreme Wave and Seismic Excitation
by Woo Chul Chung, Chungkuk Jin, MooHyun Kim and Sewon Kim
J. Mar. Sci. Eng. 2023, 11(12), 2357; https://doi.org/10.3390/jmse11122357 - 13 Dec 2023
Cited by 1 | Viewed by 1427
Abstract
This study proposes a mooring design strategy for a submerged floating tunnel (SFT) subject to extreme waves and earthquakes. Several critical design parameters, such as submerged depth and mooring station interval, are taken into account. As a target structure, a 700 m long [...] Read more.
This study proposes a mooring design strategy for a submerged floating tunnel (SFT) subject to extreme waves and earthquakes. Several critical design parameters, such as submerged depth and mooring station interval, are taken into account. As a target structure, a 700 m long SFT system with permanent stations at both ends, representing the fixed–fixed-end boundary condition, is established. To consider coupled dynamics between the tunnel and the mooring system with structural elasticity, an efficient time-domain simulation model is established. Three combinations of environmental conditions are considered: extreme wave only, extreme earthquake only, and both extreme earthquake and operating wave. First, to check the submerged-depth effect on the dynamic response of the SFT system, including mooring tension, two different submerged-depth (deep and shallow) types are simulated and analyzed. It is confirmed that the deep submerged-depth model (A-type) has an advantage under extreme wave conditions, whereas the shallow submerged-depth model (B-type) is equipped with better resistance when subject to an earthquake. Thus, the compromise submerged-depth model (C-type) is newly devised to enhance structural integrity under various environmental circumstances. Furthermore, a mooring station interval sensitivity test with the C-type is performed and demonstrates the integrity of the C-type. Full article
(This article belongs to the Special Issue Analysis and Design of Marine Structures)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Enhancing Marine Renewable Energy Systems: Integration of V2G Technology with Fuzzy Logic for Power Smoothing in Offshore Networks
Authors: Edisson Villa-Ávila (First author), Paul Arévalo-Cordero (Corresponding author), Danny Ochoa-Correa, J. L. Espinoza, Esteban Albornoz-Vintimilla, Francisco Jurado
Affiliation: @red.ujaen.es
Abstract: The integration of renewable energy sources in marine structures presents significant challenges due to the intermittent nature of photovoltaic (PV) systems. This article proposes an innovative energy smoothing method using vehicle-to-grid (V2G) technology in grid-connected marine systems. The proposal employs fuzzy logic to enhance the widely used low-pass filter method, including a state-of-charge monitoring control to optimize the charging and discharging processes of V2G batteries, mitigating PV energy fluctuations at the common coupling point. The method will be validated through experimental tests varying the state of charge of electric vehicle batteries (20%, 50%, and 90%) to evaluate its performance. The primary objective is to improve energy quality in marine electrical distribution systems with a high penetration of renewable energy, highlighting the potential of V2G technologies in renewable energy integration and the enhancement of state-of-charge control methods.

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