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Advances in Marine Engineering Hydrodynamics
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Advances in Marine Engineering Hydrodynamics

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: 20 February 2025 | Viewed by 5173

Special Issue Editors

Prof. Dr. Yihan Xing

E-Mail Website
Guest Editor
Department of Mechanical and Structural Engineering and Material Sciences, University of Stavanger, N-4036 Stavanger, Norway
Interests: floating wind turbines; offshore floating structures; marine structures; offshore renewable energy; offshore mechanics; subsea technology
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Fengmei Jing

E-Mail Website
Guest Editor
School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China
Interests: wave energy; tidal energy; offshore wind energy; deep sea energy development; marine equipment design and performance prediction
Special Issues, Collections and Topics in MDPI journals
Dr. Renwei Ji

E-Mail Website
Guest Editor
School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China
Interests: ocean engineering hydrodynamics; offshore renewable energy; CFD solver development; model experiment techniques

Special Issue Information

Dear Colleagues,

Marine engineering hydrodynamics is the foundation of marine, ship, coastal, and offshore engineering, covering a wide range of topics related to ship hydrodynamics, ship structural mechanics, and fluid–structure interaction. In recent years, due to climate change and the development of ocean engineering, the subject of marine engineering hydrodynamics has received increasing attention, being widely applied in the fields of offshore renewable energy (wind, tidal, wave, multi-energy integrated system), marine equipment hydrodynamics (ship hydrodynamics, hydroelasticity, tank sloshing), polar engineering, marine aquaculture, coastal protection, marine environment, shipping, and more.

This Special Issue focuses on recent advances in the theoretical, computational, and experimental contributions to all aspects of marine engineering hydrodynamics.

Prof. Dr. Yihan Xing
Prof. Dr. Fengmei Jing
Dr. Renwei Ji
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

  • offshore renewable energy (wind, tidal, wave, multi-energy integrated system)
  • ship hydrodynamics
  • wave–structure interaction
  • hydroelasticity
  • fluid–structure interaction
  • numerical method
  • machine learning
  • model test

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

Published Papers (7 papers)

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Research

19 pages, 4378 KiB  
Article
Hydrodynamic Characteristics of Offshore Wind Turbine Pile Foundations Under Combined Focusing Wave-Current Conditions
by Renwei Ji, Xiangquan Li, Yonglin Ye, Renqing Zhu, Ke Sun, Miankui Wu, Fei Huang and Ratthakrit Reabroy
J. Mar. Sci. Eng. 2024, 12(11), 2068; https://doi.org/10.3390/jmse12112068 - 15 Nov 2024
Viewed by 446
Abstract
In extreme marine environments, the interaction between offshore wind turbine pile foundations (OWTPFs) is critical, and the associated hydrodynamic loads are complex. This study focused on fixed OWTPFs and used computational fluid dynamics (CFD) to numerically simulate the flow field around pile foundations [...] Read more.
In extreme marine environments, the interaction between offshore wind turbine pile foundations (OWTPFs) is critical, and the associated hydrodynamic loads are complex. This study focused on fixed OWTPFs and used computational fluid dynamics (CFD) to numerically simulate the flow field around pile foundations under the combined action of focusing waves and current. The objective was to investigate the influence of different focusing wave and current parameters on the hydrodynamic properties of the pile foundations. The findings indicate the following: (1) When the wave and current directions are opposite, the maximum wave force on the pile foundations is greater than when they are aligned. (2) Large-amplitude focusing waves around pile foundations generate secondary loads, which are nonlinear and lead to a rapid increase in the wave force. These secondary loads are short-lived and particularly prominent near the front row of pile foundations. (3) The influence of the group pile effect diminishes under high-amplitude waves, where the wave component dominates the generation of the dimensionless wave force, and the impact of the current on this force decreases. Full article
(This article belongs to the Special Issue Advances in Marine Engineering Hydrodynamics)
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34 pages, 19538 KiB  
Article
Coupled Motion Response Analysis for Dynamic Target Salvage under Wave Action
by Gang Sun, Shengtao Chen, Hongkun Zhou and Fei Wan
J. Mar. Sci. Eng. 2024, 12(9), 1688; https://doi.org/10.3390/jmse12091688 - 23 Sep 2024
Viewed by 630
Abstract
The strategic recovery of buoys is a critical task in executing deep-sea research missions, as nations extend their exploration of marine territories. This study primarily investigates the dynamics of remotely operated vehicle (ROV)-assisted salvage operations for floating bodies during the recovery of dynamic [...] Read more.
The strategic recovery of buoys is a critical task in executing deep-sea research missions, as nations extend their exploration of marine territories. This study primarily investigates the dynamics of remotely operated vehicle (ROV)-assisted salvage operations for floating bodies during the recovery of dynamic maritime targets. It focuses on the hydrodynamic coefficients of dual floating bodies in this salvage process. The interaction dynamics of the twin floats are examined using parameters such as the kinematic response amplitude operator (RAO), added mass, damping coefficient, and mean drift force. During the “berthing stage”, when the double floats are at Fr = 0.15–0.18, their roll and yaw Response Amplitude Operators are diminished, resulting in smoother motion. Thus, the optimal berthing speed range for this stage is Fr = 0.15–0.18. During the “side-by-side phase”, the spacing between the ROV and FLOAT under wave action should be approximately 0.4 L to 0.5 L. The coupled motion of twin floating bodies under the influence of following waves can further enhance their stability. The ideal towing speed during the “towing phase” is Fr = 0.2. This research aims to analyze the mutual influence between two floating bodies under wave action. By simulating the coupled motion of dual dynamic targets, we more precisely assess the risks and challenges inherent in salvage operations, thus providing a scientific basis for the design and optimization of salvage strategies. Full article
(This article belongs to the Special Issue Advances in Marine Engineering Hydrodynamics)
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19 pages, 7647 KiB  
Article
Ship Optimization Based on Fully-Parametric Models for Hull, Propeller and Rudder
by Xuankai Cheng, Xinhui Huang, Detao Xu, Zhengbin Zhao, Hongbin Liu, Ming Kong and Renwei Ji
J. Mar. Sci. Eng. 2024, 12(9), 1635; https://doi.org/10.3390/jmse12091635 - 13 Sep 2024
Viewed by 694
Abstract
The purpose of ship optimization is to reduce the resistance of the ship and improve the propulsive efficiency of the propeller. Taking the design of the hull, propeller and rudder as an example, the integration optimization of ship speed performance based on the [...] Read more.
The purpose of ship optimization is to reduce the resistance of the ship and improve the propulsive efficiency of the propeller. Taking the design of the hull, propeller and rudder as an example, the integration optimization of ship speed performance based on the fully-parametric model was described in detail. Based on the parent hull, stock propeller and flat plate rudder, the fully-parametric coupling models of ship, propeller and rudder were established. The fully-parametric optimization method was used to optimize the optimal combination of hull, propeller and rudder with low resistance, high efficiency and appropriate propeller light running margin. The models were tested in the towing tank to verify the speed performance of the two sets of hulls, propellers and rudders. It was found that the ship integration optimization method based on the fully-parametric model excavated the improvement space of the ship’s speed performance from the overall level and realized the integration optimization of the fully-parametric model. The design of hull, propeller and rudder achieved the best speed performance. Compared with the initial design, the speed performance was greatly improved. By analyzing the effects of the hull, propeller and rudder separately, it was found that these parts have different effects on speed performance improvement, and ultimately can maximize the overall comprehensive income; CFD calculation and model test results had a good agreement. Full article
(This article belongs to the Special Issue Advances in Marine Engineering Hydrodynamics)
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24 pages, 9114 KiB  
Article
Real-Time Prediction of Multi-Degree-of-Freedom Ship Motion and Resting Periods Using LSTM Networks
by Zhanyang Chen, Xingyun Liu, Xiao Ji and Hongbin Gui
J. Mar. Sci. Eng. 2024, 12(9), 1591; https://doi.org/10.3390/jmse12091591 - 9 Sep 2024
Cited by 1 | Viewed by 556
Abstract
This study presents a novel real-time prediction technique for multi-degree-of-freedom ship motion and resting periods utilizing Long Short-Term Memory (LSTM) networks. The primary objective is to enhance the safety and efficiency of shipborne helicopter landings by accurately predicting heave, pitch, and roll data [...] Read more.
This study presents a novel real-time prediction technique for multi-degree-of-freedom ship motion and resting periods utilizing Long Short-Term Memory (LSTM) networks. The primary objective is to enhance the safety and efficiency of shipborne helicopter landings by accurately predicting heave, pitch, and roll data over an 8 s forecast horizon. The proposed method utilizes the LSTM network’s capability to model complex nonlinear time series while employing the User Datagram Protocol (UDP) to ensure efficient data transmission. The model’s performance was validated using real-world ship motion data collected across various sea states, achieving a maximum prediction error of less than 15%. The findings indicate that the LSTM-based model provides reliable predictions of ship resting periods, which are crucial for safe helicopter operations in adverse sea conditions. This method’s capability to provide real-time predictions with minimal computational overhead highlights its potential for broader applications in marine engineering. Future research should explore integrating multi-model fusion techniques to enhance the model’s adaptability to rapidly changing sea conditions and improve the prediction accuracy. Full article
(This article belongs to the Special Issue Advances in Marine Engineering Hydrodynamics)
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22 pages, 5978 KiB  
Article
Numerical Investigation of Flow Field Characteristics around Two Ship Hull Sections with Different Reynolds Numbers
by Jiaqi Zhou, Junsheng Ren, Can Tu and Shixue Yang
J. Mar. Sci. Eng. 2024, 12(9), 1547; https://doi.org/10.3390/jmse12091547 - 4 Sep 2024
Viewed by 607
Abstract
In the field of ocean engineering, the variation of flow field during ship-to-ship (STS) interaction has been a hot topic. Noteworthy, the effect of vortex distribution on flow field characteristic variations during STS interaction remains insufficiently researched. This study modifies the RNG k [...] Read more.
In the field of ocean engineering, the variation of flow field during ship-to-ship (STS) interaction has been a hot topic. Noteworthy, the effect of vortex distribution on flow field characteristic variations during STS interaction remains insufficiently researched. This study modifies the RNG k-ε model using the OpenFOAM platform and verifies its reliability by comparing it with literature data. Subsequently, extended research is conducted to investigate the flow field characteristics of two different ship hull sections under different Reynolds numbers (Re=68,000 and Re=6800), analyzing velocity components, vortex distribution, and trends in pressure and turbulent kinetic energy fields relative to the vortex field. The research reveals that Re primarily governs changes in upstream and downstream flow fields, while in the gap field, the variation in flow field characteristics is more constrained by geometry and boundary conditions. This research provides a valuable reference for assessing flow field characteristics in STS interactions. Full article
(This article belongs to the Special Issue Advances in Marine Engineering Hydrodynamics)
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19 pages, 6455 KiB  
Article
An Improved High-Realism Turbulence Simulation of Ocean Scenes in a Maritime Simulator
by Tianhui Zhu, Hongxiang Ren, Haijiang Li and Xiao Yang
J. Mar. Sci. Eng. 2024, 12(9), 1498; https://doi.org/10.3390/jmse12091498 - 30 Aug 2024
Viewed by 568
Abstract
The realism of ocean visual systems is a key challenge in developing maritime simulators within ocean engineering. Achieving high realism in turbulence simulation is crucial for enhancing the effectiveness of these simulators. Traditional spectrum-based methods lack realism and fail to generate turbulent interaction [...] Read more.
The realism of ocean visual systems is a key challenge in developing maritime simulators within ocean engineering. Achieving high realism in turbulence simulation is crucial for enhancing the effectiveness of these simulators. Traditional spectrum-based methods lack realism and fail to generate turbulent interaction effects. To address this, an improved Hybrid Smoothed Particle Hydrodynamics method is proposed for simulating ocean scenes, incorporating advanced micropolar fluid model techniques to enhance detail realism. The proposed algorithm introduces a density constraint solver that directly adjusts particle distribution and couples it with a divergence-free velocity solver, aiming to construct a physical-based fluid simulation framework that enhances detail realism in ocean scene simulations. The results demonstrate that the proposed method effectively accelerates the convergence of constraint conditions, reduces simulation time, and improves overall incompressibility. Additionally, the introduced turbulence model addresses high-frequency detail loss caused by numerical dissipation in the Smoothed Particle Hydrodynamics method, enabling more complex navigation scenarios. This study provides theoretical and technical references for achieving realistic ocean scene simulations in maritime simulators. Full article
(This article belongs to the Special Issue Advances in Marine Engineering Hydrodynamics)
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26 pages, 9633 KiB  
Article
Analysis of Horizontal Cylinder Load under Different Conditions in Regards to Waves and Flows
by Xiaoguo Zhou, Qingdian Jiang, Kai Wang and Shuqi Wang
J. Mar. Sci. Eng. 2024, 12(7), 1101; https://doi.org/10.3390/jmse12071101 - 28 Jun 2024
Cited by 1 | Viewed by 698
Abstract
A numerical simulation based on the CFD method is used to study the interaction between a horizontal cylinder and wave flow. Firstly, a two-dimensional numerical calculation model of both a fixed and a rigid moving cylinder, with a free surface under varying wave [...] Read more.
A numerical simulation based on the CFD method is used to study the interaction between a horizontal cylinder and wave flow. Firstly, a two-dimensional numerical calculation model of both a fixed and a rigid moving cylinder, with a free surface under varying wave flow conditions, is created. In the established model, the loads on the horizontal cylinder under different submergence depths, flow velocities, cylinder sizes, wave periods, and k values (spring stiffness) are analyzed and calculated. The results show that, when the cylinder is close to the free surface, its hydrodynamic load under wave flow conditions is more sensitive to changes in submergence depth, which essentially affects wave reflection and blockage. At different flow velocities, k values, cylinder radii, and arm lengths, the main frequency of the Fourier transform of the cylinder motion curve remains unchanged; however, the main frequency does change with the wave period and submergence depth. The efficiency of rotary cylindrical energy harvesting is influenced by various factors, among which an initial increase and then decrease are observed with a gradually increasing k value, arm length, period, and radius, in addition to an observed decrease with increasing flow velocity. Full article
(This article belongs to the Special Issue Advances in Marine Engineering Hydrodynamics)
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