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Preprint ARTICLE | doi:10.20944/preprints202306.0064.v1

Reconstructing the Global Stress of Marine Structures Based on Artificial Intelligence

Tao Zhang, Jiajun Hu, Erkan Oterkus, Selda Oterkus, Xueliang Wang, Zhentao Jiang, Guocai Chen

Subject: Engineering, Marine Engineering Keywords: n/a; ship and Ocean Engineering; Marine Structures; Global Stress; Artificial Intelligence; structure health monitoring (SHM)

Online: 1 June 2023 (08:23:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1808.v1

Leader-follower Formation Tracking Control of Underactuated Surface Vehicles Based on Event-trigged Control

Xiaoming Xia, Zhaodi Yang, Tianxiang Yang

Subject: Engineering, Marine Engineering Keywords: Leader–follower; event-triggered controller; underactuated surface vessels

Online: 25 May 2023 (11:12:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1697.v1

Coordinated Obstacle Avoidance of Multi-AUV Based on Improved Artificial Potential Field Method and Consistency Protocol

Haomiao Yu, Luqian Ning

Subject: Engineering, Marine Engineering Keywords: AUV Formation; Formation Avoidance; Artificial Potential Field Method； Auxiliary Potential Fields； Consistency Protocol.

Online: 24 May 2023 (05:04:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1212.v1

Spectrum-Based Logistic Regression Modeling for the Sea Bottom Soil Categorization

Uri Kushnir, Vladimir Frid

Subject: Engineering, Marine Engineering Keywords: marine survey; acoustic reflection; spectral analysis; sediments identification

Online: 17 May 2023 (08:43:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1069.v1

Numerical Study on Ductile Failure Behaviours of Steel Structures under Quasi-static Punch Loading

Wei Cai, Zhihui Zhou, Xudong Qian, Dongfeng Cao, Shuxin Li, Ling Zhu, Haixiao Hu

Subject: Engineering, Marine Engineering Keywords: steel structures; ductile fracture; modified GTN model; shear failure; punch loading

Online: 16 May 2023 (03:18:07 CEST)

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A reliable finite element procedure to simulate shear-dominated ductile fracture in large-scale, thin-walled steel structures is still evolving due primarily to the challenges in determining the fracture criterion of steel materials under complex stress states. This paper aims to examine the accuracy of the modified Gurson-Tvergaard-Needleman (GTN) model considering the shear failure in simulating ductile fracture of steel plate structures under quasi-static punch loading. The modified GTN damage models are performed by ABAQUS user defined material subroutine (VUMAT). The void related parameters and shear damage parameters of Xue’s and N-H modified GTN models are calibrated from test specimens with various geometries corresponding to different stress triaxiality and shearing conditions. The damage evolution associated with the shearing of voids in the modified GTN models has strong influences on the stress triaxiality versus equivalent plastic strain under complex stress states, especially for the shear dominated loading conditions. Based on the original GTN model, Xue’s model, and N-H modified GTN model with calibrated material parameters, a numerical comparative study examines the ductile fracture of steel non-stiffened plate and stiffened plate under punch loading. Benchmarked against the experimental studies, the numerical simulations demonstrate that the shear driven void evolution in the modified GTN model imposes significant effects on the load-displacement responses, as well as the onset and extension of ductile fracture in steel plates under punch actions. The N-H modified model with calibrated shear damage parameters shows a better correlation with the ductile fractures in steel plates observed in the experiment, than the original GTN model and Xue’s modified GTN model. As a result of this study, the modified GTN model considering the shear failure can be applied for practical applications in the crashworthiness assessment of ship collision and grounding.

Preprint ARTICLE | doi:10.20944/preprints202305.0764.v1

Wind Drift, Breakdown and Pile up of the Ice Field

Vadim K Goncharov

Subject: Engineering, Marine Engineering Keywords: breakdown; collision; current; drift; ice field; ice fragment; pile; resistance; wind

Online: 10 May 2023 (14:34:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0958.v1

Strain Rate-dependent Mechanical Response of Hydrate-bearing Sediments under Plane Strain Condition

Qi Wu, Yingjie Zhao, Norimasa Yoshimoto, Jinan Guan, Yukio Nakata, Shintaro Kajiyama, Masayuki Hyodo

Subject: Engineering, Marine Engineering Keywords: methane hydrate; strain-rate dependent; fine particles; hydrate saturation; particle tracking velocimetry

Online: 26 April 2023 (04:47:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0707.v1

Pankun: A New Generation Broadband Ocean Bottom Seismograph

Dan Liu, Ting Yang, Yizhi Wang, Yuechu Wu, Xinfeng Huang

Subject: Engineering, Marine Engineering Keywords: ocean bottom seismograph (OBS); seismometer; digitizer; leveling system

Online: 21 April 2023 (09:51:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0445.v1

Study on the Influence of Underwater LED Illumination on Bidirectional Underwater Wireless Optical Communication

Kelin Sun, Biao Han, Jingchuan Yang, Bo Li, Bin Zhang, Kaibin Liu, Chen Li

Subject: Engineering, Marine Engineering Keywords: underwater wireless optical communication; LED; blue-green light communication

Online: 17 April 2023 (10:31:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0401.v1

A Deep Learning Method for Ship Detection and Traffic Monitoring in Offshore Wind Farm Waters

Xintong Liu, Yutian Hu, Huiting Ji, Mingyang Zhang, Qing Yu

Subject: Engineering, Marine Engineering Keywords: traffic safety; offshore wind farms; YOLOv3; stereo vision; deep learning

Online: 17 April 2023 (04:38:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0316.v1

Multi-Scale Model Crack Extension Study Based on XFEM

Guangzhong Liu, Zezhu Chen

Subject: Engineering, Marine Engineering Keywords: Extend the finite element; multi-point constraint; ship crack

Online: 13 April 2023 (08:59:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0163.v1

A Polar Moving-Base Alignment Based on Backtracking Scheme

Jianhua Cheng, Jiaxin Liu, Yu Wang, Jing Cai

Subject: Engineering, Marine Engineering Keywords: Inertial navigation system; Initial alignment; Backtracking Scheme; Polar region

Online: 10 April 2023 (10:00:18 CEST)

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Preprint ESSAY | doi:10.20944/preprints202304.0157.v1

Study of Ship Overtaking Boundary in Narrow Waterways

Yihua Liu, Jinsong LI

Subject: Engineering, Marine Engineering Keywords: waterway transportation; boundary conditions; AIS data; MASS; intelligent transportation

Online: 10 April 2023 (08:13:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0076.v1

Path Planning Method for Underwater Gravity-Aided Inertial Navigation Based on PCRB

Bo Wang, Tijing Cai

Subject: Engineering, Marine Engineering Keywords: autonomous underwater vehicle (AUV); Gravity-aided inertial navigation system (GAINS); A* optimization; path planning; posterior Cramér-Rao bound (PCRB)

Online: 6 April 2023 (10:10:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0352.v1

Risk Connectedness among International Stock Markets: Fresh Findings from a Network Approach

Ki-Hong Choi, Seong-Min Yoon

Subject: Engineering, Marine Engineering Keywords: risk connectedness; network approach; value-at-risk; international stock market; extreme risk

Online: 20 March 2023 (07:57:54 CET)

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Preprint ARTICLE | doi:10.20944/preprints202302.0346.v1

Tightly Coupled INS/APS Passive Single Beacon Navigation

Zhuoyang Zou, Wenrui Wang, Bin Wu, Lingyun Ye, Washington Yotto Ochieng

Subject: Engineering, Marine Engineering Keywords: INS/APS single beacon navigation; tightly coupled navigation; passive synthetic aperture; joint DOA/OWTT estimation

Online: 21 February 2023 (01:56:42 CET)

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Preprint ARTICLE | doi:10.20944/preprints202302.0272.v1

Path Planning in Case of Swarm Unmanned Surface Vehicles for Visiting Multiple Targets

Charis Ntakolia, Dimitrios V. Lyridis

Subject: Engineering, Marine Engineering Keywords: Ant colony optimization; Fuzzy logic; Multi-objective path planning; Swarm USV; Metaheuristics

Online: 16 February 2023 (06:23:13 CET)

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Preprint ARTICLE | doi:10.20944/preprints202302.0150.v1

Cascade CFAR & SLA Ship Detector for Multi-Frequency SAR Data

Roberto Del Prete, Maria Daniela Graziano, Alfredo Renga

Subject: Engineering, Marine Engineering Keywords: Synthetic Aperture Radar; Maritime Monitoring; Multi-frequency; Multi-mission; Ship Detection; CFAR; Sublook Analysis

Online: 8 February 2023 (16:04:16 CET)

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Preprint ARTICLE | doi:10.20944/preprints202301.0103.v1

Artificial Intelligence Enhanced UUV Actuator Control

Zhiyu Wang, Timothy Sands

Subject: Engineering, Marine Engineering Keywords: artificial general intelligence; intelligent robotics; oceanic robots; unmanned underwater vehicle (UUV); deterministic artificial intelligence; model-following; recursive least squares; marine actuators; self-tuning regulators

Online: 5 January 2023 (10:23:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints202212.0492.v1

Discerning Discretization for UUV DC Motor Control

Jovan Menezes, Timothy Sands

Subject: Engineering, Marine Engineering Keywords: Discretization; DC motors; deterministic artificial intelligence; adaptive control; learning control; proportional derivative; estimation; least squares; modeling

Online: 27 December 2022 (10:35:46 CET)

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Preprint ARTICLE | doi:10.20944/preprints202211.0565.v1

Development and Comparison of Regional/Seasonal Wave Scatter Table using Hindcast Data for Simplified Operational Measures of Ships

Samuel Mangalathu Raj, Hossein Enshaei, Nagi Abdussamie

Subject: Engineering, Marine Engineering Keywords: Wave scatter table; operational measures; second generation intact stability criteria; hindcast wave scatter table; hindcast data

Online: 30 November 2022 (06:03:04 CET)

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Preprint ARTICLE | doi:10.20944/preprints202210.0433.v2

The Influence of Crest Widths and Working States on Wave Transmission of Pile-rock Breakwaters in the Coastal Mekong Delta

Nguyet-Minh Nguyen, Duong Do Van, Tu Le Duy, Nhat Truong Pham, Thanh Dang Duc, Ahad Hasan Tanim, David Wright, Phong Nguyen Thanh, Duong Tran Anh

Subject: Engineering, Marine Engineering Keywords: pile-rock breakwater; wave transmission; wave reflection; energy dissipation; physical model; East Sea of Mekong Delta

Online: 8 November 2022 (06:44:38 CET)

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The coastline in the Ca Mau and the Kien Giang provinces of the Vietnamese Mekong Delta has been severely eroded in recent decades. Pile-Rock Breakwaters (PRBW) are one of the most widely adopted structures for controlling shoreline erosion in this region. These structures are effective for wave energy dissipation, stimulating sediment accumulation, and facilitating the restoration of mangrove forests. These breakwaters are generally considered to be best-engineering practice however there is currently insufficient scientific evidence with regard to specific structural design aspects. This can lead to PRBW structures being compromised when deployed in the field. This study uses a physical model of a PRBW in a laboratory to investigate several design parameters, including crest width and working states (i.e. submerged, transition, and emerged), and investigates their relationship with the wave transmission coefficient, wave reflection coefficient, and wave energy dissipation. To investigate these relationships further, empirical formulas were derived for PRBWs under different sea states and crest widths to aid the design process. The results showed that PRBW width had a significant influence on the wave energy coefficients. The findings revealed that the crest width of the breakwater is inversely proportional to the wave transmission coefficient (K_t) under the emerged state. The crest width is also proportional to the wave reduction efficiency and wave energy dissipation in both working states (i.e., submerged and emerged states). The front wave disturbance coefficient (K_f) was found to be proportional to the wave reflection coefficient, and the wave height in front of the structure was found to increase by up to 1.4 times in the emerged state. The wave reflection coefficient requires special consideration to reduce the toe erosion in the structure. Lastly, empirical equations including linear and non-linear formulas were compared with previous studies for different classes of breakwaters. These empirical equations will be useful for understanding the wave transmission efficiency of PRBWs. The findings of this study provide important guidance for PRBW design in the coastal area of the Mekong Delta.

Preprint ARTICLE | doi:10.20944/preprints202210.0433.v1

The Wave Reduction Efficiency How Relates with the Crest Widths, Working States of Pile-rock Breakwater in Coastal Mekong Delta

Nguyet-Minh Nguyen, Duong Do Van, Tu Le Duy, Nhat Truong Pham, Thanh Dang Duc, Ahad Hasan Tanim, David Wright, Phong Nguyen Thanh, Duong Tran Anh

Subject: Engineering, Marine Engineering Keywords: pile-rock breakwater; wave transmission; wave reflection; energy dissipation; physical model; East Sea of Mekong Delta

Online: 27 October 2022 (11:03:12 CEST)

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The coastline in Ca Mau and Kien Giang provinces on Mekong Delta has been severely eroded in recent years. The Pile-Rock Breakwater (PRBW) was selected as predominant structure to construct widely more than 30 km on the west coast of Ca Mau. This structure shows the effectiveness of wave reduction, stimulating sediment accumulation and facilitating restoration of mangrove forest. However, this breakwater had been designed on the basis of best-engineering practice, lacking sufficient scientific background with regard to the structural design, capacity of wave reduction, working conditions. This study is to investigate the interaction of crest width, working states (submerged, transition and emerged) and the wave transmission coefficient, wave reflection coefficient and wave energy dissipation of PRBW by experiment in the laboratory and derive the empirical formulas for this construction under different sea states and crest widths. The results show a significant influence of width dimensions on the above coefficients. The findings revealed that the crest width of the breakwater is inversely proportional to the wave transmission coefficient (Kt) under emerged state. The crest width is also proportional to the wave reduction efficiency and wave energy dissipation in both working states (submerged and emerged states). The front wave disturbance coefficient is proportional to the reflected wave coefficient and the wave height in front of the structure can increase by 1.4 times in the emerged state. It is especially important to note when designing this structure to reduce the erosion in the structure toe due to the reflected waves. The empirical equations including linear and non-linear formulas have also developed and compared with previous studies for different breakwaters. This is necessary to be considered to calculate the structure and stability of breakwater. The results of this study serve as the basis for the design of pile-rock breakwater to reduce the waves under different natural conditions in the coastal area of the Mekong Delta.

Preprint ARTICLE | doi:10.20944/preprints202210.0290.v1

Nearshore Wave Energy Resource Assessment for Off-grid Islands: A Case Study in Cuyo Island, Palawan, Philippines

Jonathan Cabiguen Pacaldo, Michael Lochinvar Sim Abundo

Subject: Engineering, Marine Engineering Keywords: SWAN wave model; Nearshore wave energy resource assessment; Ocean renewable energy; Wave energy model simulation; Off-grid island electrification; Cuyo Island; Palawan

Online: 19 October 2022 (14:30:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0387.v1

Towards Integrated Digital-twins: An Application Framework for Autonomous Maritime Surface Vessel Development

Minahil Raza, Hanna Prokopova, Samir Huseynzade, Sepinoud Azimi, Sebastien Lafond

Subject: Engineering, Marine Engineering Keywords: maritime autonomy; autonomous ship; safety; digital twin; deep reinforcement learning; collision avoidance; situational awareness

Online: 26 September 2022 (08:55:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0211.v2

Turbulent Eddy Generation for the CFD Analysis of Hydrokinetic Turbines

Matteo Gregori, Francesco Salvatore, Roberto Camussi

Subject: Engineering, Marine Engineering Keywords: tidal energy; hydrokinetic turbines; Synthetic turbulence models; computational ﬂuid dynamics; Detached Eddy Simulation

Online: 15 August 2022 (03:39:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0211.v1

Turbulent Eddy Generation for the CFD Analysis of Hydrokinetic Turbines

Matteo Gregori, Francesco Salvatore, Roberto Camussi

Subject: Engineering, Marine Engineering Keywords: tidal energy; hydrokinetic turbines; Synthetic turbulence models; computational ﬂuid dynamics; Detached Eddy Simulation

Online: 11 August 2022 (07:55:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0383.v1

Spot Charter Rate Forecast for Liquefied Natural Gas Carriers

Dimitrios V. Lyridis

Subject: Engineering, Marine Engineering Keywords: machine learning; forecast; regression models; Liquified Natural Gas; maritime transportation

Online: 26 July 2022 (03:50:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0155.v1

Underwater Image Enhancement in Epicontinental Sea Based on the Improved Algorithm of Dark Channel

Zhu Dachang

Subject: Engineering, Marine Engineering Keywords: underwater image enhancement; dark channel; improved algorithm; RGB color space

Online: 11 July 2022 (09:00:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202206.0350.v1

Opportunities and Challenges in the Lake Turkana Fishery: Building a Sustainable Fisheries Sector

James Last Keyombe, Julia Obuya, Winnie Owoko, David Namwaya, Elizabeth Katiwa

Subject: Engineering, Marine Engineering Keywords: Lake Turkana Fishery; fishery policy

Online: 27 June 2022 (05:31:25 CEST)

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Turkana County's fisheries sector, which is entirely dependent on Lake Turkana, is vital to the county's economy. The Fisheries Sector in the County supports 1,500 households directly and 1,100 households indirectly. Despite its economic and social importance, the sector faces numerous challenges such as high post-harvest fish losses, uncoordinated development approaches, over-exploitation of some lake areas and weak links between research, management, and other sector players. Furthermore, since the start of devolution in 2013, the sector has been operating without an overall policy and legal framework. The primary goal of the study was to identify important challenges in the management of the fisheries sector in Turkana County that would lead the successful and coordinated growth of the fisheries industry. To capture their perspectives on the problems and potential in the usage of Lake Turkana's fisheries resources, semi-structured questionnaires and Key Informants interviews were used to collect primary data from the sector's fisheries actors. A total of 60 people were interviewed, and their responses were recorded in the Kobo Collect toolbox for later analysis. Secondary data was also gathered from numerous national policy declarations, guidelines, and legislation that have been used to manage Lake Turkana's fishery resources. The findings indicate that a policy directing the exploitation and development of fisheries is required in order to fully realize the potential of fisheries and aquaculture in the County. The development of the policy will lay a solid foundation for the creation of a legal framework to strengthen the sector in Turkana County, which is a necessary step toward achieving sustainable development and management of fisheries in accordance with national, regional, and international frameworks. By leveraging the role of the County Directorate of Fisheries and Beach Management Units in the sectors' monitoring, management, and development, the policy will also promote effective coordination of stakeholders at all levels.

Preprint ARTICLE | doi:10.20944/preprints202206.0349.v1

The Hull of A Galleon: An Archaic Construction or A Masterpiece of Ship Design

Rasim Asgarov

Subject: Engineering, Marine Engineering Keywords: history of shipbuilding; Galleon hull; Barque hull; seakeeping analysis; CFD analysis; 3D model

Online: 27 June 2022 (04:09:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0297.v1

Effect of Temperature Change on Acoustic Emission Signal in Igbt Transistors of Marine Propulsion System Converters

Radosław Gordon, Artur Bejger

Subject: Engineering, Marine Engineering Keywords: acoustic emission; sensor; transducer; gate turn-off thyristor; power electronics

Online: 23 May 2022 (10:33:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0137.v1

Spectral Analysis of Flow Around Single and Two Crossing Circular Cylinders Arranged at 60 and 90 Degrees

Tianyuan Wang, Qingqing Yang, Yeting Tang, Hongda Shi, Qin Zhang, Mengfei Wang, Andrey Epikhin, Andrey Britov

Subject: Engineering, Marine Engineering Keywords: low-dimensional models; vortex dynamics; wakes

Online: 10 May 2022 (10:11:48 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202204.0253.v1

Research on Monitoring and Operation and Maintenance Technology of Far-Reaching Sea Smart Wind Farm

Zhen Wang, Yaohua Guo, Haijun Wang

Subject: Engineering, Marine Engineering Keywords: Offshore Wind power; Operation and maintenance management; Intelligent operation and maintenance robot; Smart wind farm technology; 5g technology

Online: 27 April 2022 (08:57:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202203.0238.v1

Developing an Extended Virtual Blade Model for Efficient Numerical Modeling of Wind and Tidal Farms

Soheil Radfar, Bijan Kinaoush

Subject: Engineering, Marine Engineering Keywords: Virtual Blade Model; Code extension; CFD modeling; Tidal turbine; Wind turbine

Online: 17 March 2022 (02:37:47 CET)

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Preprint TECHNICAL NOTE | doi:10.20944/preprints202202.0087.v1

Stand for Biomimetic Swimming Fins Fatigue Testing

Radosław Kiciński, Ewa Olewnik Kruszkowska, Bogdan Szturomski, Wojciech Jurczak

Subject: Engineering, Marine Engineering Keywords: swimming fins testing; biomimetics; fatigue testing; thermoplastics; laboratory stand; accelerat-ed fatigue testing

Online: 7 February 2022 (13:01:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0458.v1

Modeling and Risk Analysis of Dam-Break Flooding in a Semi‐Arid Montane Watershed.

Aissam Gaagai, Hani Amir Aouissi, Andrey E. Krauklis, Juris Burlakovs, Ali Athamena, Ivar Zekker, Abderahmane Boudoukha, Lahcen Benaabidate, Haroun Chenchouni

Subject: Engineering, Marine Engineering Keywords: Dam breach parameters; dam failure scenario; flood hazard; flood hydrodynamics; flood simulation; simulated natural hazard

Online: 28 December 2021 (18:13:16 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0189.v1

Development of Combined Load Spectra for Offshore Structures Subjected to Wind, Wave, and Ice Loading

Moritz Braun, Alfons Dörner, Kane Falco ter Veer, Tom Willems, Marc Seidel, Hayo Hendrikse, Knut Vilhelm Høyland, Claas Fischer, Sören Ehlers

Subject: Engineering, Marine Engineering Keywords: Arctic conditions; Ice-Induced Vibrations; Offshore Wind Turbine Support Structures; Stress-Time Sequence; Damage Model; Rainflow counting; Markov chain method; Omission Level; Low-Temperature Fatigue

Online: 10 December 2021 (14:16:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints202111.0241.v1

Collaborative Workplace Design: a Knowledge-Based Approach to Promote Human-Robot Integration and Multi-Objective Layout Optimization

Andrea Rega, Castrese Di Marino, Agnese Pasquariello, Ferdinando Vitolo, Stanislao Patalano, Alessandro Zanella, Antonio Lanzotti

Subject: Engineering, Marine Engineering Keywords: Collaborative robotics; Human-Robot Collaboration (HRC); Knowledge-Based Approach (KBA); collaborative workplace design; systematic layout planning; digital layout optimization; what-if analysis.

Online: 12 November 2021 (17:17:02 CET)

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Preprint ARTICLE | doi:10.20944/preprints202110.0301.v1

Optimal Configuration and Sizing of Seaport Microgrids including Renewable Energy and Cold Ironing – The Port of Aalborg Case Study

Nur Najihah Abu Bakar, Josep M. Guerrero, Juan Vasquez, Najmeh Bazmohammadi, Muzaidi Bin Othman, Brian Dalby Rasmussen, Yusuf Al-Turki

Subject: Engineering, Marine Engineering Keywords: Cold ironing; energy management system; optimal sizing; renewable energy sources; seaport microgrids; maritime

Online: 21 October 2021 (08:53:44 CEST)

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Preprint REVIEW | doi:10.20944/preprints202110.0300.v1

A Review of the Conceptualization and Operational Management of Seaport Microgrids on the Shore and Seaside

Nur Najihah Abu Bakar, Josep M. Guerrero, Juan C.Vasquez, Najmeh Bazmohammadi, Yun Yu, Abdullah Abusorrah, Yusuf A. Al-Turki

Subject: Engineering, Marine Engineering Keywords: cold ironing; electrification; operation management; renewable energy source; seaport microgrids; shipboard microgrid; maritime

Online: 21 October 2021 (07:34:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202110.0283.v1

Innovative Energy-Saving Propulsion System for Low-Speed Biomimetic Underwater Vehicles

Paweł Piskur, Piotr Szymak, Michal Przybylski, Krzysztof Naus, Krzysztof Jaskólski, Mariusz Zokowski

Subject: Engineering, Marine Engineering Keywords: fish-like movement; underwater robotics; undulating propulsion; Biomimetic Unmanned Underwater Vehicle (BUUV); energy efficiency; Fluid-Structure Interaction (FSI)

Online: 20 October 2021 (09:17:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202110.0252.v1

On the Use of Artificial Intelligence to Define Tank Transfer Functions

Pál Schmitt, Charles Gillan, Ciaran Finnegan

Subject: Engineering, Marine Engineering Keywords: tank transfer function; neural networks; machine learning; OpenFOAM; computational fluid dynamics

Online: 18 October 2021 (15:17:20 CEST)

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Preprint REVIEW | doi:10.20944/preprints202109.0246.v1

Traceability of Sustainable and Safe Fisheries Supply Chain Management Systems using Radio Frequency Identification Technology

Labonnah Farzana Rahman, Lubna Alam, Mohammad Marufuzzaman, Ussif Rashid Sumaila

Subject: Engineering, Marine Engineering Keywords: food safety; sustainability; RFID; technology; fisheries; consumption; traceability

Online: 14 September 2021 (15:35:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202109.0112.v1

Contrasitive Learning for 3D Point Clouds Classification and Shape Completion

Danish Nazir, Muhammad Zeshan Afzal, Alain Pagani, Marcus Liwicki, Didier Stricker

Subject: Engineering, Marine Engineering Keywords: 3D point Cloud Classification, 3D point Cloud Shape Completion,Auto-Encoders, Contrastive Learning, Self-Supervised Learning

Online: 6 September 2021 (18:00:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202108.0330.v1

Underwater Communication Using UAV to Realize High-speed AUV Deployment

Yusuke Yokota, Takumi Matsuda

Subject: Engineering, Marine Engineering Keywords: UAV; AUV; underwater communication; buoy

Online: 16 August 2021 (11:53:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202106.0520.v1

COLREGs Compliant Fuzzy-based Collision Avoidance System for Multiple Ship Encounters

Yaseen Adnan Ahmed, Mohammed Abdul Hannan, Mahmoud Yasser Oraby, Adi Maimun

Subject: Engineering, Marine Engineering Keywords: Collision Avoidance; COLREGs; Fuzzy logic; Decision Making; Multiple Ships; MATLAB Simulink

Online: 21 June 2021 (14:55:32 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202105.0145.v1

Weight Estimation of Marine Propulsion and Power Generation Machinery

Arun Kr Dev, Makaraksha Saha

Subject: Engineering, Marine Engineering Keywords: engine weight; engine power; engine/generator power; engine RPM; cylinder number; power-RPM ratio; power-RPM ratio per cylinder; low-speed; medium-speed; high-speed; standard deviation; correlation coefficient; coefficient of multiple determination; F-statistic

Online: 7 May 2021 (14:17:36 CEST)

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During the conceptual and preliminary design stage of a ship, designers need to ensure that the selected principal dimensions and parameters are good enough to deliver a stable ship (statically and dynamically) besides deadweight and speed. To support this, the initial intact stability of the proposed ship is required to be calculated, and in doing so, the lightship weight and its detailed breakdown are necessary to be known. After hull steel weight, machinery weight, mainly, marine propulsion and power generation machinery, play a vital role in the lightship weight estimate of a ship due to its robustness. The correct estimation of respective weights improves the accuracy of calculating a ship's initial stability typically to be designed and built. Hence, it would be advantageous for the designer to convince the ship owner. A total of 3006 marine propulsion (main marine diesel) engines and 348 power generation (auxiliary marine diesel) engines/generators of various power output (generators output for auxiliary engines), engine RPM and cylinder number of different engine makers are collected. These are analyzed and presented in both tabular and graphical forms to demonstrate the possible relationship between marine propulsion engine weight and power generation engine weight, and their respective power output, RPM, cylinder number, power-RPM ratio and power-RPM ratio per cylinder.In this article, the authors have attempted to investigate the behavior of marine propulsion engine weight and power generation engine/generator weight regarding engine power output, generator power output, engine RPM and cylinder number (independent variables). Further attempts have been made to identify those independent variables that influence the weight of the marine propulsion engine and power generation engine/generator (dependent variables), and their interrelationships. A mathematical model has thus been developed and proposed, as a guiding tool, for the designer to estimate the weight of main and auxiliary engines more accurately during the conceptual and preliminary design stage.

Preprint ARTICLE | doi:10.20944/preprints202105.0134.v1

Simulation and Modelling for a Three-Dimensional Ocean Surface Wave using and Inverse Fourier Transform

Young Jun Yang

Subject: Engineering, Marine Engineering Keywords: ocean surface wave simulation; inverse Fourier transform; directional wave spectrum; linear superposition; Nyquist frequency

Online: 7 May 2021 (09:42:22 CEST)

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Working Paper ARTICLE

A Novel T-S Fuzzy Robust Control for Part Transportation of Aircraft Carrier Considering Transportation Time and Stochastic Demand

Tiantian Luan, Mingxiao Sun, Zhanyong Hu, Qiang Fu, Hao Wang

Subject: Engineering, Marine Engineering Keywords: part transportation; Takagi-Sugeno fuzzy control; carrier aircraft; transportation time; stochastic demand; cross rule group

Online: 15 April 2021 (15:00:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202011.0181.v2

A Sustainable, Integrated Multi-Level Floating Farm Concept: Singapore Perspective

Rasim Asgarov, David MacLaren, Mohammed Abdul Hannan, Prateek Khandelwal

Subject: Engineering, Marine Engineering Keywords: Floating farming; sustainable farming; Integrated farming; Multilevel Floating Farm

Online: 15 April 2021 (13:38:39 CEST)

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Working Paper ARTICLE

Reanalysis of the Sydney Harbor RiverCat Ferry

Lawrence Doctors

Subject: Engineering, Marine Engineering Keywords: Ferry design; wave generation; ship hydrodynamics

Online: 14 January 2021 (07:54:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints202012.0430.v1

Time-Dependent Motion of a Floating Circular Elastic Plate

Michael Meylan

Subject: Engineering, Marine Engineering Keywords: Hydroelasticity; Floating Plate; Linear Water Waves

Online: 17 December 2020 (12:04:22 CET)

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Preprint ARTICLE | doi:10.20944/preprints202011.0432.v1

Anisotropic RANS Turbulence Modeling for Wakes in an Active Ocean Environment

Dylan Wall, Eric Paterson

Subject: Engineering, Marine Engineering Keywords: Stratified Wakes; Turbulence; RANS; Secont-Moment Closure; Stress-transport

Online: 16 November 2020 (15:40:25 CET)

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Preprint ARTICLE | doi:10.20944/preprints202009.0582.v1

A Useful Manufacturing Guide for Rotary Piercing Seamless Pipe by ALE Method

Ameen Topa, Burak Can Cerik, Do Kyun Kim

Subject: Engineering, Marine Engineering Keywords: structural analysis; structural design; rotary piercing; seamless pipes; bulk metal forming; FSI

Online: 24 September 2020 (11:43:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0351.v1

A Measurement of Shipbuilding Productivity

Paulo Z. Roque, José Manuel Gordo

Subject: Engineering, Marine Engineering Keywords: Shipbuilding; productivity; block's manufacturing; manufacturing cost

Online: 16 September 2020 (07:08:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0129.v1

A Simplified Method to Simulate Residual Stresses in Plates

José Manuel Gordo, Gonçalo Teixeira

Subject: Engineering, Marine Engineering Keywords: Residual stresses; Plate welding; Simulation

Online: 5 September 2020 (07:57:44 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202005.0434.v2

Augmenting Maneuverability of UUVs with Cycloidal Propellers

Manavendra Desai, Ruddhi Gokhale, Atanu Halder, Moble Benedict, Yin Lu Young

Subject: Engineering, Marine Engineering Keywords: Cycloidal propellers; Unmanned underwater vehicles; Autonomous underwater vehicles; Maneuvering

Online: 5 September 2020 (07:42:19 CEST)

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This paper investigates a novel concept of using cycloidal propellers to augment the maneuverability of unmanned underwater vehicles. Cycloidal propellers are cross-flow propellers that utilize 360$^{\circ}$ thrust vectoring to provide agile maneuvering to surface vessels like yachts, tug boats, buoy tenders and double ended ferries, but have yet to be utilized on present-day unmanned and autonomous marine vehicles. Through 360$^{\circ}$ thrust vectoring, cycloidal propellers enable surface vessels to execute spot turns, and surge in forward and backward directions with equal ease. Such compact maneuvers are difficult to execute with the conventional screw propeller-rudder setup found on marine vehicles today. On unmanned and autonomous marine vehicles, cycloidal propellers can potentially enable controlled and decoupled maneuvering in all six degrees-of-freedom while overcoming disturbances like waves and currents, and extreme flow conditions like cavitation and ventilation. This is critical for marine vehicles operating at low speeds and in restricted waters. Therefore, the objective of this paper is to study the maneuvering characteristics of a UUV driven by a screw propeller and control fins only, and compare it to that of the UUV augmented with retractable cycloidal propellers. The cases considered are a turning circle maneuver, a low-speed 180$^{\circ}$ turn and a low-speed heave maneuver. A six degrees-of-freedom motion prediction model that accounts for the non-linear and coupled loads on an underwater vehicle is developed and validated. Simulation results showed that compared to conventional propulsion systems, cycloidal propellers could potentially enable more swift, compact and decoupled maneuvers in unmanned marine vehicles. Integrated with robust control systems, cycloidal propellers can be explored for use in dynamic positioning, ocean exploration, station-keeping, seakeeping and teaming of unmanned and autonomous marine vehicles.

Preprint ARTICLE | doi:10.20944/preprints202009.0117.v1

Sound Field Properties of Non-cavitating Marine Propeller

Youjiang Wang, Ulf Göttsche, Moustafa Abdel-Maksoud

Subject: Engineering, Marine Engineering Keywords: underwater radiated noise; propeller; Ffowcs William-Haukings; permeable FW-H; BEM

Online: 5 September 2020 (04:59:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0429.v1

Effect of Residual Stresses on the Elastoplastic Behavior of Welded Steel Plates

José Manuel Gordo

Subject: Engineering, Marine Engineering Keywords: ultimate strength of plates; residual stresses; initial imperfections

Online: 20 August 2020 (05:45:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0270.v1

Dynamic, Fully Coupled, Electro-mechanical Models of Tidal Turbines

Arturo Ortega, Joseph Praful Tomy, Jonathan Shek, Stephane Paboeuf, David Ingram

Subject: Engineering, Marine Engineering Keywords: coupled system; tidal turbine; electrical system; blade element momentum theory; actuator line model; computational fluid dynamics

Online: 12 August 2020 (04:46:13 CEST)

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Production of electricity using hydro-kinetic tidal turbines has many challenges that must to be overcome to ensure reliable, economic and practical solutions. Energy from flowing water is converted by a system comprising: the turbine rotor blades, a gearbox, an electrical generator, control systems, power electronics, export cables, and a connection to the electricity grid. To date these have often been modelled using simulations of independent systems, lacking bi-directional, real-time, coupling. This approach leads to critical effects being missed. Turbulence in the flow, results in large velocity fluctuations around the blades, causing rapid variation in the shaft torque and generator speed, and consequently in the voltage seen by the power electronics and consequently the export power quality. The resulting poor quality power may be unacceptable to the grid. Conversely, grid frequency and voltage changes can also cause the generator speed to change, resulting in changes to the shaft speed and torque and consequently changes to the lift and drag forces acting on the blades. Clearly, fully integrated, bi-directional, models are needed. Here we present two fully coupled models which use different approaches to model the hydrodynamics of rotor blades. The first model uses Blade Element Momentum Theory (BEMT), resulting in an efficient tool for turbine designers. The second model also uses BEMT combines this with an actuator line model of the blades coupled to an unsteady computational fluid dynamics (CFD) simulation. This simulation, implemented in OpenFOAM, uses an energy balance to compute the shaft speed. Both the BEMT and CFD models are coupled to an Open Modellica model of the electro-mechanical system. Both models have been used to simulate the performance of a 1.2m diameter, scale model, of a three bladed horizontal axis tidal turbine tested in the University of Edinburgh FloWave Ocean Energy Research Facility. The turbulent flow around the blades and the mechanical-electrical variables during the stable period of operation are analysed. Time series and tabulated average values of mechanical thrust, power, torque, and rotational speed as well as electrical variables of generator power, electromagnetic torque, voltage and current are presented for the coupled system simulation. The relationship between the mechanical and electrical variables and the results from both tidal turbine approaches are discussed. Our comparison shows that while the BEMT model provides an effective design tool (leading to slightly more conservative designs), the CFD/BEMT simulations provide more accurate predictions of the blade loads which can be especially important in assessing fatigue on the blades (though at an increased computational cost).

Preprint REVIEW | doi:10.20944/preprints202007.0663.v1

Design Criteria for the Floating Walkways and Pontoons Considering the Extreme Climatic Conditions

Sami M. Ayyad

Subject: Engineering, Marine Engineering Keywords: identification; manufacturing; transportation; installation

Online: 28 July 2020 (04:31:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0615.v1

An Alternative Technique for Ultra-high Resolution Bathymetry and Seabed Inspection for Marine Renewables

Francisco Gemo Albino Francisco, Jan Sundberg

Subject: Engineering, Marine Engineering Keywords: Bathymetry; marine renewables; seabed inspection; high resolution survey; sonar

Online: 25 July 2020 (17:01:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0572.v1

Ultimate Compressive Strength of Stiffened Panel: An Empirical Formulation for Flat-bar Type

Do Kyun Kim, Su Young Yu, Hui Ling Lim, Nak-Kyun Cho

Subject: Engineering, Marine Engineering Keywords: ocean and shore technology (OST); empirical formula; ultimate limit state; longitudinal compression; stiffened plate; ships and offshore structures; structural design

Online: 24 July 2020 (05:32:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0387.v1

Design of Breakwaters to Minimize Greenwater Loading on Bow Structures of Fixed Floating Vessels

Lim Jun An, Mohammed Abdul Hannan

Subject: Engineering, Marine Engineering Keywords: Bow structures; Breakwater design; CFD; Greenwater; Wave structure interaction

Online: 17 July 2020 (15:09:16 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202006.0077.v1

Underwater Optical Path Loss after Passage of Tropical Storm

Peter C. Chu, Chenwu Fan

Subject: Engineering, Marine Engineering Keywords: underwater wireless optical communication (UWOC); radiative transfer equation solver; optical path loss; tropical cyclone

Online: 7 June 2020 (10:01:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202005.0434.v1

Augmenting Maneuverability of UUVs with Cycloidal Propellers

Manavendra Desai, Ruddhi Gokhale, Atanu Halder, Moble Benedict, Yin Lu Young

Subject: Engineering, Marine Engineering Keywords: Cycloidal propellers; Unmanned underwater vehicles; Maneuvering

Online: 26 May 2020 (13:24:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202003.0471.v1

Bacterial Foraging Algorithm for Optimal Joint-Force Searching Strategy of Multi – SAR Vessels at Sea

Ngoc Ha Pham, Minh Duc Nguyen

Subject: Engineering, Marine Engineering Keywords: search and rescue; optimal search algorithm; BFOA; multi-direction search; co-ordinate SAR operations

Online: 31 March 2020 (23:26:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202003.0468.v1

Development of Broadband Underwater Radio Communication for Application in Unmanned Underwater Vehicles

Igor Smolyaninov, Quirino Balzano, Dendy Young

Subject: Engineering, Marine Engineering Keywords: unmanned underwater vehicle; broadband radio communication; surface electromagnetic wave

Online: 31 March 2020 (23:08:38 CEST)

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Working Paper ARTICLE

Development and Weight of Leading and Lagging KPIs for Offshore Structural Integrity

Yisu Zhou, Minghe Zhang, Yixiao Zhou, Zhang Long

Subject: Engineering, Marine Engineering Keywords: KPIs; offshore structural integrity; Bowtie; FAHP

Online: 21 February 2020 (07:42:14 CET)

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Preprint ARTICLE | doi:10.20944/preprints202002.0237.v1

Development and Implementation of the Application APPMAR 1.0. A Toolbox for Management of Meteorological and Marine Data on Limited Information Regions

German Rivillas-Ospina, Marianella Bolivar, Mauro Maza Chamorro, Gabriel Ruiz, Diego Casas, Roberto Guerrero

Subject: Engineering, Marine Engineering Keywords: Colombia; Colombian Caribbean; marine climate; Mallorquín Lagoon; Puerto Colombia; Wave Watch III; wave; wind

Online: 17 February 2020 (03:32:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints201912.0140.v2

Surprising Behaviour of the Wageningen B-screw Series Polynomials

Stephan Helma

Subject: Engineering, Marine Engineering Keywords: propeller; wageningen b-screw series; open-water characteristics; propeller efficiency map; danckwardt diagram; optimum propeller

Online: 30 January 2020 (10:59:59 CET)

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Preprint TECHNICAL NOTE | doi:10.20944/preprints202001.0311.v1

Assessment of the Atmosphere Composition after Washing, Gas-Freeing and Aerating Processes in Vessel Cargo Tanks

Jerzy Herdzik

Subject: Engineering, Marine Engineering Keywords: vessel cargo holds; tank washing; gas-freeing; aerating; atmosphere composition; assessment of safe atmosphere

Online: 26 January 2020 (07:43:21 CET)

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Preprint ARTICLE | doi:10.20944/preprints202001.0190.v1

Ranking Port State Control Detention Remarks: Professional Judgement and Spatial Overview

Efe Akyrek, Pelin Bolat

Subject: Engineering, Marine Engineering Keywords: Port State Control; AHP; Paris MOU; GIS; Maritime Regulations

Online: 17 January 2020 (10:27:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints201912.0405.v1

Optimal Design of the Water Quality Monitoring Network in the Semi-enclosed Estuary

Nam-Hoon Kim, Jin Hwan Hwang

Subject: Engineering, Marine Engineering Keywords: Optimal design procedure; monitoring network; water quality; graphical optimization; objective mapping

Online: 31 December 2019 (10:17:53 CET)

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Working Paper COMMUNICATION

A Novel Random Access Algorithm for Very High Frequency Data Exchange (VDE)

Yi JIang, Yang Zheng, Junsen Wang

Subject: Engineering, Marine Engineering Keywords: VDES; VDE; ATL-CRDSA; Load control; RACH

Online: 24 December 2019 (11:36:03 CET)

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Preprint ARTICLE | doi:10.20944/preprints201912.0318.v1

Numerical Analysis of Full-scale Ship Self-Propulsion Performance with direct Comparison to Statistical Sea Trail Results

Wenyu Sun, Qiong Hu, Shiliang Hu, Jia Su, Jie Xu, Jinfang Wei, Guofu Huang

Subject: Engineering, Marine Engineering Keywords: Hull-propeller interaction; Full-scale CFD; Scale effect; Self-propulsion; Statistical sea trails

Online: 24 December 2019 (11:16:25 CET)

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Accurate prediction of the self-propulsion performance is one of the most important factors for energy-efficient design of a ship. In general, the hydrodynamic performance of a full-scale ship could be achieved by model-scale simulation or towing tank test with extrapolations. With the development of CFD methods and computing power, directly predict ship performance with full-scale CFD is an important approach. In this article, a numerical study on the full-scale self-propulsion performance with propeller operating behind ship at model- and full-scale is presented. The study includes numerical simulations using RANS method with double-model and VOF model respectively and scale effect analysis based on overall performance, local flow fields and detailed vortex identification. Verification study on grid convergence is also performed for full-scale simulation with global and local mesh refinements. And a series of sea trail tests were performed to collect reliable data for the validation of CFD predictions. The analysis of scale effect on hull-propeller interaction shows that the difference on hull boundary layer and flow separation is the main source of scale effect on ship wake. And the results of the fluctuations of propeller thrust and torque along with circulation distribution and local flow field show that propeller’s loading is significantly higher for model-scale ship. It is suggested that the difference on vortex evolution and interaction is more pronounced and have larger effects on ship’s powering performance at model-scale than full-scale according to the simulation results. From the study on self-propulsion prediction, it could be concluded that the simplification on free surface treatment does not only affect the wave-making resistance for bare hull but also the propeller performance and propeller induced ship resistance which can produced up to 5% uncertainty to the power prediction. Roughness is another important factor in full-scale simulation because it has up to approximately 7% effect on the delivery power. As a result of validation study, the numerical simulations of full-scale ship self-propulsion shows good agreement with the sea trail data especially for cases that have considered both roughness and free surface effects. This result will largely enhance our confidence to apply full-scale simulation in the prediction of ship’s self-propulsion performance in the future ship designs.

Preprint ARTICLE | doi:10.20944/preprints201912.0140.v1

Surprising Behaviour of the Wageningen B-screw Series Polynomials

Stephan Helma

Subject: Engineering, Marine Engineering Keywords: propeller; wageningen b-screw series; open-water characteristics; propeller efficiency map; danckwardt diagram; optimum propeller

Online: 10 December 2019 (15:57:55 CET)

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Working Paper REVIEW

A Review of Research on Light Visual Perception of Unmanned Surface Vehicles

Wei Zhang, Bo Wang

Subject: Engineering, Marine Engineering Keywords: unmanned surface vehicles; optical visual perception; image stabilization; defogging; target detection; target tracking

Online: 24 November 2019 (16:54:46 CET)

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Preprint ARTICLE | doi:10.20944/preprints201910.0338.v1

A New Risk-based Early-warning Method for Ship Collision Avoidance

Yingfan Chen, Shuzhe Chen, Pieter van Gelder, Cheng Xie, Liwen Huang

Subject: Engineering, Marine Engineering Keywords: ship collision accident; early warning; probability of causation; environmental factor

Online: 29 October 2019 (11:02:10 CET)

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Preprint ARTICLE | doi:10.20944/preprints201909.0052.v1

Safety of GNSS-Like Underwater Positioning Systems

Tomasz Abramowski, Mateusz Bilewski, Larisa Dobryakova, Evgeny Ochin, Janusz Uriasz, Paweł Zalewski

Subject: Engineering, Marine Engineering Keywords: antiterrorism; underwater GNSS; underwater GPS; spoofer; antispoofing; spoofing detection; underwater transport safety

Online: 5 September 2019 (03:27:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201906.0148.v1

Analysis of Operability Envelopes for Subsea Production Tree Installation

Fei Wang, Neng Chen

Subject: Engineering, Marine Engineering Keywords: operability envelope; SPT installation; drill pipe; ocean conditions; mechanical behavior

Online: 16 June 2019 (11:09:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201904.0183.v1

Stochastic Modeling of Forces on Jacket-Type Offshore Structures Colonized by Marine Growth

Hamed Ameryoun, Franck Schoefs, Laurent Barille, Yoann Thomas

Subject: Engineering, Marine Engineering Keywords: marine growth; biofouling; wave loading; stochastic modeling; reliability; jacket structures

Online: 16 April 2019 (10:49:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201903.0226.v2

Path Analysis of Causal Factors Influencing Marine Traffic Accident via Structural Equation Numerical Modeling

Shenping Hu, Zhuang Li, Yongtao Xi, Xunyu Gu, Xinxin Zhang

Subject: Engineering, Marine Engineering Keywords: maritime traffic; marine accident; accident causation theory; human factor; structural equation modeling; HFACS; path dependency

Online: 26 March 2019 (10:53:41 CET)

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Preprint ARTICLE | doi:10.20944/preprints201903.0226.v1

Path Analysis of Causal Factors Influencing Marine Traffic Accident via Structural Equation Numerical Modeling

Shenping Hu, Zhuang Li, Yongtao Xi, Xunyu Gu, Xinxin Zhang

Subject: Engineering, Marine Engineering Keywords: maritime traffic; marine accident; accident causation theory; human factor; structural equation modeling; HFACS; path dependency

Online: 25 March 2019 (11:51:20 CET)

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Preprint ARTICLE | doi:10.20944/preprints201902.0150.v1

Preventive Maintenance Topic Models for LNG Containment Systems of LNG Marine Carriers Using Dock Specifications

Ik-Hyun Youn, Sung-Cheol Kim

Subject: Engineering, Marine Engineering Keywords: preventive maintenance model; LNG cargo containment system; aging effect; dock specification; natural language processing

Online: 18 February 2019 (09:21:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints201811.0394.v2

A Sparse Autoencoder and Softmax Regression based Diagnosis Method for the Attachment on the Blades of Marine Current Turbine

Yilai Zheng, Tianzhen Wang, Bin Xin, Tao Xie, Yide Wang

Subject: Engineering, Marine Engineering Keywords: Marine current turbine; blade attachment; sparse autoencoder; softmax regression

Online: 4 February 2019 (13:22:39 CET)

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Preprint ARTICLE | doi:10.20944/preprints201901.0222.v1

The Efficient Application of an Impulse Source Wavemaker to CFD Simulations

Pál Schmitt, Christian Windt, Josh Davidson, John V. Ringwood, Trevor Whittaker

Subject: Engineering, Marine Engineering Keywords: numerical wave tank; internal wavemaker; CFD; wave generation; OpenFOAM

Online: 22 January 2019 (12:09:25 CET)

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Preprint ARTICLE | doi:10.20944/preprints201611.0064.v3

Sonar for Environmental Monitoring: Configuration of a Multifunctional Active Acoustics Platform Applied for Marine Renewables

Francisco Gemo Albino Francisco, Jan Sundberg

Subject: Engineering, Marine Engineering Keywords: Active acoustics; Multibeam Sonar; Dual-beam Sonar; Split-beam Sonar, Environmental monitoring; Offshore renewable energy

Online: 10 December 2018 (15:44:02 CET)

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Preprint ARTICLE | doi:10.20944/preprints201811.0534.v1

Saint Venant and Navier-Stokes Models for Tsunami Simulations

Camille Journeau, Kévin Pons, Richard Marcer

Subject: Engineering, Marine Engineering Keywords: tsunami; CFD; Saint Venant (SV) model; Adaptive Mesh Refinement (AMR); large scale propagation; 3D Navier-Stokes (NS) model; coastal impact

Online: 22 November 2018 (04:43:54 CET)

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Preprint ARTICLE | doi:10.20944/preprints201810.0611.v1

AJA method and AJA Canvas as a Design Tool for Autonomous Operations

Marialena Vagia, Esten Ingar Grøtli, Aksel A. Transeth, Magnus Bjerkeng, Fredrik Haugli, Gorm Johansen

Subject: Engineering, Marine Engineering Keywords: Autonomy; LOA; design; swarms; underwater vehicles; marine; Autonomous Job Analysis; canvas

Online: 25 October 2018 (15:33:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0441.v1

On the Effect of Cavity Formation during the Water Entry of Flexible Bodies

Riccardo Panciroli, Tiziano Pagliaroli, Giangiacomo Minak

Subject: Engineering, Marine Engineering Keywords: water entry; hydroelasticity; cavitation; FSI; SPH; slamming

Online: 19 October 2018 (08:00:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0352.v1

Shoreline Stabilization with Experimental Groin Field(s): Modular Adjustable Permeable Groins

Nicholas De Gennaro, Frank Gable

Subject: Engineering, Marine Engineering Keywords: coastal erosion; beach renourishment; articulated concrete mat; piles; littoral transport

Online: 16 October 2018 (11:05:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0257.v1

Determination of Crude Oil Thickness at Night Using Thermal Imagery

Toomas H. Allik

Subject: Engineering, Marine Engineering Keywords: remote sensing; oil spill thickness measurement; night heat transfer model

Online: 12 October 2018 (05:21:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0131.v1

Engineering Design Driven by Models and Measures: The Case of a Rigid Inflatable Boat

Cristiano Fragassa

Subject: Engineering, Marine Engineering Keywords: boat design; experimental mechanics; stress-strain analysis; numerical modelling; rigid inflatable boat; fiber-reinforced composite

Online: 8 October 2018 (07:43:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201809.0546.v1

Motion and Dynamic Responses Approach for WindFloat Structures under Marine Loads

Ionut Cristian Scurtu, Delia Garleanu, Gabriel Garleanu

Subject: Engineering, Marine Engineering Keywords: wave energy, marine loads, RAO function, dynamic response

Online: 27 September 2018 (13:11:46 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201809.0210.v2

Automated Identification of Discrepancies between Nautical Charts and Survey Soundings

Giuseppe Masetti, Tyanne Faulkes , Christos Kastrisios

Subject: Engineering, Marine Engineering Keywords: nautical cartography; chart adequacy; change detection; triangulated irregular network; safety of navigation; ocean mapping

Online: 26 September 2018 (05:40:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201809.0426.v1

A Comparison of Empirical Procedures for Fatigue Damage Prediction in Instrumented Risers undergoing Vortex-Induced Vibration

Chen Shi, Lance Manuel, Michael Tognarelli

Subject: Engineering, Marine Engineering Keywords: riser; vortex-induced vibration; fatigue damage prediction; empirical method

Online: 21 September 2018 (04:04:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201809.0210.v1

Automated Identification of Discrepancies between Nautical Charts and Survey Soundings

Giuseppe Masetti, Tyanne Faulkes, Christos Kastrisios

Subject: Engineering, Marine Engineering Keywords: nautical cartography; chart adequacy; change detection; triangulated irregular network; safety of navigation; ocean mapping

Online: 12 September 2018 (05:29:31 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201807.0608.v1

Analysis of Electromagnetic Waves Attenuation for Underwater Localization in Structured Environments

Daegil Park, Kyungmin Kwak, Wan Kyun Chung, Jinhyun Kim

Subject: Engineering, Marine Engineering Keywords: underwater range sensor; underwater localization; sensor network; received signal strength

Online: 31 July 2018 (06:26:03 CEST)

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