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Application of Flexible Structure in Marine Engineering
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Application of Flexible Structure in Marine Engineering

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

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 17016

Special Issue Editor

Dr. Sarat Chandra Mohapatra

E-Mail Website1 Website2
Guest Editor
Centre for Marine Technology and Ocean Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Interests: hydroelasticity; marine dynamics and hydrodynamics; wave–current interaction; offshore floating and submerged flexible structures
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are inviting submissions to the Special Issue ‘Application of Flexible structure in Marine Engineering’. This Special Issue is motivated by the increase in migration of the population to coastal areas, the demand of energy worldwide, and the lack of food production. In order to meet coastal protection, the worldwide demand of energy, and food production needs, researchers are working hard to find flexible-type structures that are cost-efficient, environmentally friendly, reusable, rapidly deployable, protected from seismic shocks, and do not damage the marine ecosystem, which could find applications in breakwaters, flexible-type structure wave energy converters, fish cages, floating oil storage tanks, ship-like structures, etc. As the mathematical theory and methods of flexible structure type complex problems are not well established and are still under development, modeling of such problems based on various methodologies (theoretical, numerical, and experimental) will have a great impact and be of interest to the readers.

Taking into consideration the above-mentioned features, this Special Issue will include, without being limited to, the following topics of interest:

  • Linear and nonlinear wave interaction with flexible structures;
  • Breakwaters of horizontal/vertical flexible porous elastic/membranes;
  • Wave energy converters (WEC) (flexible wind energy device, plate/membrane type structure);
  • Analytical and numerical flexible net-type model;
  • Fluid–structure interactions (hydroelastic analysis);
  • Boussinesq-type model associated with flexible structures;
  • Effect of bottom on floating/submerged flexible structures;
  • Flexible floating/submerged and moored system dynamics.
Dr. Sarat Chandra Mohapatra
Guest Editor

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

  • Hydroelastic
  • Dynamics of moored structures
  • Hydrodynamics of floating and submerged structures
  • Mathematical model
  • Wave–structure interaction with complicated seabed
  • Flexible porous membrane
  • Wave energy device of flexible structure

Published Papers (6 papers)

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Editorial

Jump to: Research

2 pages, 172 KiB  
Editorial
Application of Flexible Structure in Marine Engineering
by Sarat Chandra Mohapatra
J. Mar. Sci. Eng. 2022, 10(12), 1893; https://doi.org/10.3390/jmse10121893 - 4 Dec 2022
Viewed by 987
Abstract
The aim of the Special Issue (SI) was to publish original and high-quality research papers that deal with model developments based on the mathematical, numerical, and experimental models associated with flexible floating or submerged structure applications in the discipline of marine engineering [...] [...] Read more.
The aim of the Special Issue (SI) was to publish original and high-quality research papers that deal with model developments based on the mathematical, numerical, and experimental models associated with flexible floating or submerged structure applications in the discipline of marine engineering [...] Full article
(This article belongs to the Special Issue Application of Flexible Structure in Marine Engineering)

Research

Jump to: Editorial

17 pages, 6953 KiB  
Article
Performance and Feasibility Study of a Novel Automated Catch-Hauling Device Using a Flexible Hose Net Structure in Set-Net
by Qiao Li, Yue Li, Shuchuang Dong, Yoichi Mizukami, Jialin Han, Takero Yoshida and Daisuke Kitazawa
J. Mar. Sci. Eng. 2021, 9(9), 1015; https://doi.org/10.3390/jmse9091015 - 16 Sep 2021
Cited by 5 | Viewed by 2657
Abstract
The labor-intensive catch-hauling method in set-net fisheries faces problems of lower productivity, lower efficiency, and higher operational risk due to aging problem and labor insufficiency. To solve such problems, a novel catch-hauling device using the flexible fire hose and net (hose net), which [...] Read more.
The labor-intensive catch-hauling method in set-net fisheries faces problems of lower productivity, lower efficiency, and higher operational risk due to aging problem and labor insufficiency. To solve such problems, a novel catch-hauling device using the flexible fire hose and net (hose net), which is placed in the box chamber, was proposed in this study. The hoses were inflated with air injected into one edge of the hose net, and the buoyancy force increased: the net gradually floated up, cornering the fish in the opposite edge. To corner and harvest the fish efficiently and safely, the changing formation and motion parameters of the hose net are significant. A series of floating up, sinking experiments, and catch-hauling tests were conducted to evaluate the performance of this device. The results showed that the hose net could gradually float in an ideal form and sink smoothly through natural exhaust and stretched on the bottom of the water tank. The time spent and average speeds in floating and sinking processes varied with air pressure and airflow rate, allowing the hose net motion to be controlled in practice by adjusting the airflow. Through the catch-hauling test using live fish, most of the fish were directed into the fish bag. Two main capture failure phenomena were also observed. Overall, this newly developed automated catch-hauling device is expected to be successful for use in modern fisheries. Full article
(This article belongs to the Special Issue Application of Flexible Structure in Marine Engineering)
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14 pages, 4458 KiB  
Article
Effect of Mooring Lines on the Hydroelastic Response of a Floating Flexible Plate Using the BIEM Approach
by Sarat Chandra Mohapatra and C. Guedes Soares
J. Mar. Sci. Eng. 2021, 9(9), 941; https://doi.org/10.3390/jmse9090941 - 30 Aug 2021
Cited by 16 | Viewed by 2069
Abstract
A boundary integral equation method (BIEM) model for the problem of surface wave interaction with a moored finite floating flexible plate is presented. The BIEM solution is obtained by employing the free surface Greens function and Green’s theorem, and the expressions for the [...] Read more.
A boundary integral equation method (BIEM) model for the problem of surface wave interaction with a moored finite floating flexible plate is presented. The BIEM solution is obtained by employing the free surface Greens function and Green’s theorem, and the expressions for the plate deflection, reflection, and transmission coefficients are derived from the integro-differential equation. Furthermore, the shallow water approximation model and its solution is obtained based on the matching technique in a direct manner. The accuracy of the present BIEM code is checked by comparing the results of deflection amplitude, reflection, and transmission coefficients with existing published results and experimental datasets as well as the shallow water approximation model. The hydroelastic response of the moored floating flexible plate is studied by analyzing the effects of the mooring stiffness, incidence angle, and flexural rigidity on the deflection amplitude, plate deformations, reflection, and transmission coefficients. The present analysis may be helpful in understanding the different physical parameters to model a wave energy conversion device with mooring systems over BIEM formulations. Full article
(This article belongs to the Special Issue Application of Flexible Structure in Marine Engineering)
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18 pages, 4431 KiB  
Article
Finite Element Analysis of the Effect of Currents on the Dynamics of a Moored Flexible Cylindrical Net Cage
by Zhongchi Liu, Sarat Chandra Mohapatra and C. Guedes Soares
J. Mar. Sci. Eng. 2021, 9(2), 159; https://doi.org/10.3390/jmse9020159 - 5 Feb 2021
Cited by 22 | Viewed by 3081
Abstract
A numerical model associated with wave–current interactions with a moored flexible cylindrical cage was developed based on the finite element method. An analytical model was formulated under the linearised wave theory and small structural response, and a semi-analytical solution was obtained using the [...] Read more.
A numerical model associated with wave–current interactions with a moored flexible cylindrical cage was developed based on the finite element method. An analytical model was formulated under the linearised wave theory and small structural response, and a semi-analytical solution was obtained using the Fourier Bessel series solution and least squares approximation method, along with a matching technique. The numerical results from the finite element analysis of the horizontal displacements for different design parameters under a uniform current were compared with the analytical model solutions. It was seen that they had a good level of agreement with their results. The effects of different current speeds and time on the cage shapes were analysed from the finite element results. Further, the mooring forces on the flexible cage for different values of the cage height and cage radius were also presented. The comparison of the results indicated that the numerical model results could be used with confidence in the design of a flexible cylindrical net cage for applications to offshore aquacultures. Full article
(This article belongs to the Special Issue Application of Flexible Structure in Marine Engineering)
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17 pages, 3321 KiB  
Article
A Study on the Minimization of Mooring Load in Fish-Cage Mooring Systems with a Damping Buoy
by Gun-Ho Lee, Bong-Jin Cha and Hyun-young Kim
J. Mar. Sci. Eng. 2020, 8(10), 814; https://doi.org/10.3390/jmse8100814 - 19 Oct 2020
Cited by 2 | Viewed by 3013
Abstract
This study established the conditions in which mooring load is minimized in a fish cage that includes a damping buoy in specific wave conditions. To derive these conditions, numerical simulations of various mooring contexts were conducted on a fish cage (1/15 scale) using [...] Read more.
This study established the conditions in which mooring load is minimized in a fish cage that includes a damping buoy in specific wave conditions. To derive these conditions, numerical simulations of various mooring contexts were conducted on a fish cage (1/15 scale) using a simplified mass-spring model and fifth-order Stokes wave theory. The simulation conditions were as follows: (1) bridle-line length of 0.8–3.2 m; (2) buoyancy of 2.894–20.513 N for the damping buoy; and (3) mooring-rope thickness of 0.002–0.004 m. The wave conditions were 0.333 m in height and 1.291–2.324 s of arrival period. Consequently, the mooring tensions tended to decrease with decreasing mooring line thickness and increasing bridle-line length and buoyancy of the buoy. Accordingly, it was assumed to be advantageous to minimize the mooring tension by designing a thin mooring line and long bridle line and for the buoyancy of the buoy to be as large as possible. This approach shows a valuable technique because it can contribute to the improvement of the mooring stability of the fish cage by establishing a method that can be used to minimize the load on the mooring line. Full article
(This article belongs to the Special Issue Application of Flexible Structure in Marine Engineering)
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25 pages, 5785 KiB  
Article
Hydroelastic Response of a Flexible Submerged Porous Plate for Wave Energy Absorption
by Sarat Chandra Mohapatra and C. Guedes Soares
J. Mar. Sci. Eng. 2020, 8(9), 698; https://doi.org/10.3390/jmse8090698 - 9 Sep 2020
Cited by 19 | Viewed by 2703
Abstract
The application of flexible horizontal porous structure has a significant impact on the design of breakwaters and wave energy absorption devices for coastal protection and wave energy extraction, respectively. This type of structure is more economical compared to a rigid type structure. Therefore, [...] Read more.
The application of flexible horizontal porous structure has a significant impact on the design of breakwaters and wave energy absorption devices for coastal protection and wave energy extraction, respectively. This type of structure is more economical compared to a rigid type structure. Therefore, the hydroelastic response of the flexible porous structure can be investigated to widen the influence of structural deformations in design parameters. This paper presents a generalized expansion formula for the said problem based on Green’s function in the water of finite depth (FD) and infinite depth (ID). The series form of the velocity potentials for the wave-maker problem is also derived using Green’s second identity. The derived expansion formula is applied to a real physical problem and the analytical solution is obtained utilizing a matched eigenfunction expansion method under velocity potential decompositions. The convergence study of the series solution is checked. The present results and the published experimental datasets, as well as analysis, are compared. The effect of design parameters on the hydroelastic response of the submerged flexible porous plate is analyzed. It is observed that the analysis of the results will be useful for gaining insight into how to design a wave energy absorption device. Full article
(This article belongs to the Special Issue Application of Flexible Structure in Marine Engineering)
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