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Structural Design of Marine and Offshore Structures
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Structural Design of Marine and Offshore Structures

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

Deadline for manuscript submissions: closed (5 April 2023) | Viewed by 9114

Special Issue Editors

Dr. Musa Bashir

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Guest Editor
Faculty of Engineering and Technology, School of Engineering, Liverpool John Moores University, Liverpool L3 3AF, UK
Interests: reliability engineering; offshore engineering; marine engineering
Special Issues, Collections and Topics in MDPI journals
Dr. Yang Yang

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Guest Editor
Faculty of Maritime and Transportation, Ningbo University, Ningbo, China
Interests: structural design; coupled modeling and advanced control offshore wind turbines
Special Issues, Collections and Topics in MDPI journals
Dr. Jin Wang

E-Mail Website
Guest Editor
Faculty of Engineering and Technology, School of Engineering, Liverpool John Moores University, Liverpool, UK
Interests: design and operation of maritime engineering systems such as ships, offshore installations and port terminals

Special Issue Information

Dear Colleagues,

Marine and offshore engineering (naval architecture, renewable energy systems, offshore oil and gas installations, cross-sea bridges, etc.) structures are complicated and challenging to design due to additional constraints imposed by their installation methods and operating conditions in remote locations. The structural design of marine and offshore systems requires precise consideration of the multi-physical field coupling effects induced by fluid (wind/wave/current)–structure–control interaction, as they are vital for optimal performance and safe operation. This Special Issue aims to present recent and meaningful research works that contribute to experimental, numerical and theoretical advances in the structural design and modeling of marine and offshore engineering systems. The authors are invited to submit both review and original articles, including but not limited to the following topics: structural modeling of offshore/marine renewable energy systems; advances in bionic structural design; structural design of marine vehicles/vessels; offshore installations and moorings under extreme ocean conditions; structural health monitoring and prognosis; and the maintenance and reliability of marine and offshore structures. Contributions outlining the applications of novel techniques to all aspects of this topic are highly encouraged.

Dr. Musa Bashir
Dr. Yang Yang
Dr. Jin Wang
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

  • structural modelling
  • renewable energy systems
  • bionic structural design
  • marine vehicles
  • offshore installations
  • extreme ocean conditions
  • structural health monitoring
  • prognosis
  • maintenance
  • reliability

Published Papers (3 papers)

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Research

19 pages, 5842 KiB  
Article
Global Structural Behavior and Leg Strength for Jack-Up Rigs with Varying Environmental Parameters
by Myung-Su Yi and Joo-Shin Park
J. Mar. Sci. Eng. 2023, 11(2), 405; https://doi.org/10.3390/jmse11020405 - 12 Feb 2023
Cited by 2 | Viewed by 5122
Abstract
In the mobile jack-up unit, the leg supporting the hull is a very important structure, and it is important to closely examine the changes in accident load, environmental load, and seabed ground during jack-up operation. Generally, jack-up rigs are three-legged structures with a [...] Read more.
In the mobile jack-up unit, the leg supporting the hull is a very important structure, and it is important to closely examine the changes in accident load, environmental load, and seabed ground during jack-up operation. Generally, jack-up rigs are three-legged structures with a triangular hull that comprises several movable legs used to raise the hull above the sea surface. They can be operated in shallow water at less than 120 m, while large jack-up rigs, which have a structure that can withstand severe environmental loads, can be employed at depths ranging from 150 m to 200 m. However, a complex process is required to finalize the structural design of a jack-up rig, and the influence of various parameters must be comprehensively considered. In other words, the rig will encounter variable environmental conditions with variations in parameters such as wave height, wave period, wind speed, air gap, and so on. A unified procedure is proposed to review the structural strength of legs, hulls, and cantilevers, and different models and analyses can be configured so that it can be solved within a unit flow-chart. Through this process, we can expect that engineering time and cost can be reduced. From survey results, it was possible to determine the inputs to examine the effects of variables, and a large jack-up rig operating under extreme environmental conditions was modeled. In the present study, the jack-up rig was operating in the North Sea, and leg length and water depth were 160 m and 100 m, respectively. The basic environmental characteristics included wave height (20 m), wave period (10 s), wind speed (30 m/s), and air gap (22 m). A parametric sensitivity analysis was performed with varying environmental parameters. Through sensitivity analysis of environmental characteristics, the significance and sensitivity of the effect of each environmental parameter on leg strength was clarified. It is expected that this will be very useful guidance about the effect of parameters during the conceptual design stage of jack-up rigs. Full article
(This article belongs to the Special Issue Structural Design of Marine and Offshore Structures)
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20 pages, 6585 KiB  
Article
Efficient Structural Dynamic Analysis Using Condensed Finite Element Matrices and Its Application to a Stiffened Plate
by Do-Hyun Ko and Seung-Hwan Boo
J. Mar. Sci. Eng. 2022, 10(12), 1958; https://doi.org/10.3390/jmse10121958 - 9 Dec 2022
Viewed by 1487
Abstract
In this study, we propose effective formulations for modal, frequency response, and transient analyses using condensed matrices of the finite element (FE) model. Employing the iterated improved reduced system (IIRS) method, a transformation matrix is defined that condenses the stiffness and inertial effects [...] Read more.
In this study, we propose effective formulations for modal, frequency response, and transient analyses using condensed matrices of the finite element (FE) model. Employing the iterated improved reduced system (IIRS) method, a transformation matrix is defined that condenses the stiffness and inertial effects of nodes to be neglected into nodes of interest. Using this, the condensed mass and stiffness matrices are derived. With these two condensed matrices, a condensed damping matrix is derived using the Rayleigh damping. By considering the condensed matrices in the original structural dynamic formulation based on the global FE matrices, the condensed structural dynamic formulation is derived, and the approximated solutions are calculated from this condensed formulation. To verify the performance of the proposed formulation, we perform a structural dynamic analysis on a stiffened plate, and by comparison with the solutions calculated from the global FE matrices, the proposed formulations have been found to provide highly accurate solutions with an excellent computational efficiency. Full article
(This article belongs to the Special Issue Structural Design of Marine and Offshore Structures)
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14 pages, 3674 KiB  
Article
Optimization of Shear Bonds of the Grouted Joints of Offshore Wind Turbine Tower Based on Plastic Damage Model
by Linqing Zhou, Weiyuan Sun, Yu Cao, Chaonan He and Xinwei Ma
J. Mar. Sci. Eng. 2022, 10(12), 1853; https://doi.org/10.3390/jmse10121853 - 1 Dec 2022
Cited by 1 | Viewed by 1525
Abstract
In recent years, offshore wind power has been developing rapidly, and single piles are among the commonly used foundations for wind turbines. Presently, experimental studies of the grouted connections of pile foundations are limited to the study of scaler models. Numerical simulations are [...] Read more.
In recent years, offshore wind power has been developing rapidly, and single piles are among the commonly used foundations for wind turbines. Presently, experimental studies of the grouted connections of pile foundations are limited to the study of scaler models. Numerical simulations are more suitable for the mechanical analysis of the full-size structure instead of experimental ones. In numerical simulations, the linear elasticity model is widely adopted, but the plastic damage is studied scarcely. So, shear bond parameter research concerning grouted joints needs to be supplemented. In this paper, a bilinear random-motion reinforcement model based on the classical metal plasticity theory is adopted for steel, and the model for the grouting material is based on the Sidiroff energy equivalence principle. The plastic damage model for the grouted connecting section is established; the stresses and deformation distribution of the steel pipes and grout in the connecting section are analyzed using the changed shear bond parameters. The results show that the rectangular and triangular shear bonds are more reasonable than the semicircular shear bond transfer. Increasing the height of the shear bond may reduce the maximum stress and the maximum vertical displacement of the grout, and the shear bond width change has less influence on the joint bond stress and displacement. Full article
(This article belongs to the Special Issue Structural Design of Marine and Offshore Structures)
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