The 9th International Conference on Marine Structures (MARSTRUCT 2023)

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Ocean Engineering".

Deadline for manuscript submissions: closed (30 October 2023) | Viewed by 6771

Special Issue Editors


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Guest Editor
Department of Mechanics and Maritime Sciences, Division of Marine Technology, Chalmers University of Technology, 412-96 Gothenburg, Sweden
Interests: marine renewable energy; ship dynamics; ship performance modelling and analysis; structural integrity analysis

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Guest Editor
Centre for Marine Technology and Ocean Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Interests: marine environment; ship dynamics; marine structures; safety and reliability
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Special Issue Information

Dear Colleagues,

The MARSTRUCT series of conferences derivd from the MARSTRUCT Network of Excellence with 33 partners, active from February 2004 to January 2010. It has become a biannual series of conferences dedicated to marine structures, allowing for periodic reporting and a discussion of developments in the field. Meanwhile, MARSTRUCT is being continued as a virtual institute.

The scope of the MARSTRUCT 2023 conference (http://www.marstruct-vi.com/marstruct2023/) had the usual broad basis, dealing with all aspects of marine structures. The scope of topics corresponded to those of the International Ship and Offshore Structures Congress (ISSC), given that this series of conferences is seen as a complementary forum to the ISSC congresses. The topics that MARSTRUCT 2023 covered included the following main areas: methods and tools for loads and load effects, methods and tools for strength assessment, experimental analysis of structures, materials and fabrication of structures, methods and tools for structural design and optimization, and structural reliability, safety and environmental protection.

MARSTRUCT 2023 was the 9th edition of the international conference arranged by the Division of Marine Technology at Chalmers University of Technology I Gothenburg, Sweden. It received around 130 abstracts, from which 99 papers were finally accepted and presented, together with 3 keynote presentations. As in the previous editions, the proceedings were published in book format; however, there may still be scope for a Special Issue of JMSE based on this conference, as the keynote presentations were not included in the proceedings, and a substantial number of abstracts were accepted for which the paper version could not be completed in time to be considered for publication in the proceedings. In addition, several papers that presented the initial results of a more extensive, ongoing study may serve as the source for follow-up or expanded papers that could be considered for publication in this Special Issue of the journal.

In addition to attendees of the conference, all colleagues in related areas are invited to submit papers for this Special Issue, which has the same broad coverage as the conference.

Prof. Dr. Jonas W. Ringsberg
Dr. Carlos Guedes Soares
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.

Published Papers (6 papers)

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Research

16 pages, 10121 KiB  
Article
Fatigue Assessment Comparison between a Ship Motion-Based Data-Driven Model and a Direct Fatigue Calculation Method
by Xiao Lang, Da Wu, Wuliu Tian, Chi Zhang, Jonas W. Ringsberg and Wengang Mao
J. Mar. Sci. Eng. 2023, 11(12), 2269; https://doi.org/10.3390/jmse11122269 - 29 Nov 2023
Viewed by 861
Abstract
Ocean-crossing ship structures continuously suffer from wave-induced loads when sailing at sea. The encountered wave loads cause significant variations in ship structural stresses, leading to accumulated fatigue damage. Where large inherent uncertainties still exist, it is now common to use spectral methods for [...] Read more.
Ocean-crossing ship structures continuously suffer from wave-induced loads when sailing at sea. The encountered wave loads cause significant variations in ship structural stresses, leading to accumulated fatigue damage. Where large inherent uncertainties still exist, it is now common to use spectral methods for direct fatigue calculation when evaluating ship fatigue. This paper investigates the use of a machine learning technique to establish a model for 2800TEU container vessel fatigue assessment. Measurement data from 3 years of cross-Atlantic sailing demonstrated and validated the machine learning model. In this investigation, the ship’s motions were used as inputs to build a machine learning model. The fatigue damage amounts predicted using a machine learning model were compared with those obtained from full-scale measurements and direct fatigue calculation. The pros and cons of the methods are compared in terms of their capability, robustness, and prediction accuracy. Full article
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20 pages, 11722 KiB  
Article
Investigation of Effect of Wind-Induced Vibration on Typical Frame Structures on the Open Decks of Large Cruise Ships Based on the Subdomain Method
by Xiliang Feng, Yue Zhu, Jin Gan, Ziheng Chen, Jing Li, Yongshui Lin and Weiguo Wu
J. Mar. Sci. Eng. 2023, 11(12), 2210; https://doi.org/10.3390/jmse11122210 - 21 Nov 2023
Viewed by 727
Abstract
Due to the tall and large superstructures of cruise ships, the wind-induced vibration of frame structure on open decks cannot be neglected. This study investigated the wind-induced vibration of a typical frame structure on a cruise ship by using wind tunnel tests and [...] Read more.
Due to the tall and large superstructures of cruise ships, the wind-induced vibration of frame structure on open decks cannot be neglected. This study investigated the wind-induced vibration of a typical frame structure on a cruise ship by using wind tunnel tests and numerical simulations. Wind tunnel tests were conducted to explore the simulation methods of the fluid–structure interaction (FSI). CFD simulations were performed to obtain the wind field data of the entire ship, which was utilized as an input for the open deck through the subdomain method. Subsequently, wind-induced vibration simulations of the guide rail frame structure on the open deck was carried out under various wind conditions. The results revealed that employing the turbulence model SST k-ω had a good agreement with the experimental data. The entire ship’s CFD results have a significant impact on the subdomain’s wind-induced vibration results. The vibration frequency of the guide rail frame structure was mainly concentrated between 0.8–10.1 Hz. The most unfavorable conditions appear at the wind attack angles of 0° and 120°. This study can provide some instructive insights for the prediction of wind-induced vibration and control of typical structures on the open decks of large cruise ships. Full article
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15 pages, 5367 KiB  
Article
Ultimate Strength Behaviour and Optimization of Laser-Welded Web-Core Sandwich Panels under In-Plane Compression
by Mohamed Elsaka and C. Guedes Soares
J. Mar. Sci. Eng. 2023, 11(11), 2200; https://doi.org/10.3390/jmse11112200 - 19 Nov 2023
Viewed by 976
Abstract
In pursuit of more efficient load-bearing solutions for ship deck panels of Very Large Crude Carriers exposed to vertical hull girder bending forces, laser-welded web-core sandwich panels are considered as an alternative to conventional stiffened panels. The primary goal is to identify a [...] Read more.
In pursuit of more efficient load-bearing solutions for ship deck panels of Very Large Crude Carriers exposed to vertical hull girder bending forces, laser-welded web-core sandwich panels are considered as an alternative to conventional stiffened panels. The primary goal is to identify a lighter steel sandwich structure capable of matching the ultimate strength of conventional counterparts. Utilizing non-linear finite element analysis, the ultimate strength of conventional decks subjected to uniaxial compression is assessed. Attention is then shifted to laser-welded sandwich panels, with a detailed examination of how various design parameters influence their performance. Specifically, four key design aspects of unidirectional vertical webs, including face thickness, web thickness, web height, and web spacing, are optimized to strike a balance between weight and strength through structural optimization techniques combined with the response surface method. Ultimately, a comparison is drawn between the ultimate strength of these innovative steel sandwich panels and their conventional, stiffened counterparts. The findings reveal that web-core sandwich panels, when employed as an alternative, result in a notable reduction in hull weight, thereby showcasing the potential for a more efficient and sustainable approach in the maritime industry. Full article
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19 pages, 5614 KiB  
Article
Characterization of the Mechanical Properties of Low Stiffness Marine Power Cables through Tension, Bending, Torsion, and Fatigue Testing
by Jonas W. Ringsberg, Lamine Dieng, Zhiyuan Li and Ingvar Hagman
J. Mar. Sci. Eng. 2023, 11(9), 1791; https://doi.org/10.3390/jmse11091791 - 13 Sep 2023
Cited by 1 | Viewed by 1258
Abstract
The exploitation and harnessing of offshore marine renewable energy have led to an increased demand for reliable marine power cables with long service lives. These cables constitute a considerable share of the total installation cost of offshore renewable energy facilities and have high [...] Read more.
The exploitation and harnessing of offshore marine renewable energy have led to an increased demand for reliable marine power cables with long service lives. These cables constitute a considerable share of the total installation cost of offshore renewable energy facilities and have high maintenance and repair costs. The critical characteristics of these power cables must be determined to reduce the risk of exceeding their ultimate strength or fatigue life, which can result in unwanted and unexpected failures. This study investigates dynamic marine power cables that are suitable for application in devices that harness energy from ocean currents, waves, and tides. Tension, bending, torsion, and fatigue tests were conducted on three dynamic power cables (1 kV, 3.6 kV, and 24 kV) that have high flexibility, i.e., low mechanical stiffness. The specimen lengths and axial pretension force were varied during the tests. The results are discussed in terms of the mechanical fatigue degradation and ultimate design load, and the key observations and lessons learned from the tests are clarified. The study’s main contribution is the results from physical component testing of the dynamic marine power cables without metallic armors, which can be used to calibrate numerical models of this type of dynamic marine power cable in the initial design of, e.g., inter-array cables between floating wave energy converters. The benefits offered by this type of cable and the importance of the results for creating reliable numerical simulation models in the future are highlighted. Full article
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17 pages, 1648 KiB  
Article
Tailoring the Fatigue Detail Category Class: A Deterministic Implementation of a Probabilistic-Based Approach to Consequence- and Uncertainty-Informed Fatigue Life Prediction of Ships
by Marije L. Deul, Coen H. H. van Battum and Martijn Hoogeland
J. Mar. Sci. Eng. 2023, 11(9), 1715; https://doi.org/10.3390/jmse11091715 - 31 Aug 2023
Viewed by 808
Abstract
The fatigue life of ship structures is typically based on deterministic methods in which underlying uncertainties are only implicitly taken into account and not explicitly reflected. Guidance for a probabilistic assessment is provided in class documents, but the methodology is too time consuming [...] Read more.
The fatigue life of ship structures is typically based on deterministic methods in which underlying uncertainties are only implicitly taken into account and not explicitly reflected. Guidance for a probabilistic assessment is provided in class documents, but the methodology is too time consuming to apply in design practice. This paper proposes a novel approach based on DNV-CG-0129 to incorporate uncertainties and consequences explicitly. Using a probabilistic model, tailored deterministic FAT classes are derived to be applied in design practice. A tailored FAT class should be selected based on an acceptable probability of failure related to the severity of the consequences of a failure for the ship. Results show that tailored FAT classes are strongly dependent on the uncertainties provided as input when using the calculation method of DNV-CG-0129. This emphasizes the need for careful consideration and specification of the uncertainties. Furthermore, application of the First Order Reliability Method for a sensitivity study shows that the global model uncertainty is governing over other uncertainties considered in DNV-CG-0129. The proposed approach enables a low-effort and transparent probabilistic-based method, leading to optimized and improved designs due to reduction of overdimensioning in non-critical areas. Full article
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17 pages, 7277 KiB  
Article
Development of the IACS Unified Strength Requirements for Hatch Covers—UR S21
by Yining Lv, Lars Brubak, Kinya Ishibashi, Andrea Bollero, Pål Arvid Saltvedt and Åge Bøe
J. Mar. Sci. Eng. 2023, 11(8), 1558; https://doi.org/10.3390/jmse11081558 - 07 Aug 2023
Cited by 1 | Viewed by 1186
Abstract
International Association of Classification Societies (IACS) is responsible for many of the ship strengthrules including both generally applicable Unified Strength Requirements (UR-S) and other rules specific for various ship types. For historical reasons, there have been different structural strength requirements regarding hatch covers, [...] Read more.
International Association of Classification Societies (IACS) is responsible for many of the ship strengthrules including both generally applicable Unified Strength Requirements (UR-S) and other rules specific for various ship types. For historical reasons, there have been different structural strength requirements regarding hatch covers, hatch coamings, and related structures in IACS UR S21, S21A, and CSR (Common Structural Rules for bulk carriers and oil tankers). This paper presents the work carried out to improve the related rules and thereby the development of the unified strength requirements for hatch covers. Firstly, related IACS rules are reviewed and compared, and some major improvements to the buckling formulations are proposed for improved accuracy. Secondly, with UR S35 being developed as a unified buckling toolbox, the unified strength requirements for hatch covers—UR S21 (Rev.6, complete revision)—are developed with a standardized interface of reference to UR S35 for buckling assessment. Finally, the numerical calculations of typical stiffened panels and full hatch covers are carried out for rule verification and consequence assessment, which demonstrates that more rational hatch cover designs can be achieved based on UR S21 (rev 6). Full article
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