Hydroelastic analysis of very large floating structure over viscoelastic bed

Das, Santu; Sahoo, T.

doi:10.1007/s11012-016-0529-5

Cited by 12 publications

(3 citation statements)

References 23 publications

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“…Therefore, a hybrid model that incorporates a power take-off system into floating and submerged structures has the potential to provide both coastline defense and commercialized wave energy extraction [27][28][29]. On the other hand, in recent decades, floating constructions have been extensively used in ocean engineering, while flexible, porous structures are also being implemented as cost-effective coastal protection systems [30][31][32]. [23,33] include more detailed evaluations of OWCs in addition to reviews on WECs in general [13,21].…”

Section: Introductionmentioning

confidence: 99%

Wave Energy Conversion through Oscillating Water Columns: A Review

Gayathri,

Chang,

Tsai

et al. 2024

JMSE

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An oscillating water column (OWC) is designed for the extraction and conversion of wave energy into usable electrical power, rather than being a standalone renewable energy source. This review paper presents a comprehensive analysis of the mathematical modeling approaches employed in OWC systems, aiming to provide an in-depth understanding of the underlying principles and challenges associated with this innovative technology. A prominent classification within the realm of wave energy devices comprises OWC systems, which exhibit either fixed or floating configurations. OWC devices constitute a significant proportion of the wave energy converter prototypes currently operational offshore. Within an OWC system, a hollow structure, either permanently fixed or floating, extends below the water’s surface, creating an enclosed chamber where air is captured over the submerged inner free surface. This comprehensive study offers a thorough assessment of OWC technology in conjunction with air turbines. Additionally, the investigation delves into theoretical, computational, and experimental modeling techniques employed for analyzing OWC converters. Moreover, this review scrutinizes theoretical, computational, and experimental modeling methodologies, providing a holistic understanding of OWC converters. Ultimately, this work contributes a thorough assessment of OWC technology’s current state, accentuating its potential for efficient wave energy extraction and suggesting future research avenues.

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Section: Introductionmentioning

confidence: 99%

Wave Energy Conversion through Oscillating Water Columns: A Review

Gayathri,

Chang,

Tsai

et al. 2024

JMSE

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“…Over the past few decades, a lot of attention has been paid to the problem of very large floating structures (VLFS) as different offshore structures such as floating airports, oil storage, wind and solar power plants, etc. (Hamamoto and Tanaka, 1 Meylan and Squire, 2 Kashiwagi 3 and Das and Sahoo 4 ). The concept of VLFS was introduced by recognizing the rise in water level owing to global warming.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of wave force on a circular flexible plate by a surface-piercing flexible porous barrier

Gayathri

Behera

2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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Wave force acting on a circular flexible plate in the presence of a vertical surface-piercing flexible porous membrane is examined under the hypothesis of linear water wave theory. A semi-analytic solution is developed employing the Fourier-Bessel series expansion method along with the methods of separation of variables and least-squares approximation. To keep the outer flexible membrane at a desired position, clamped-moored condition is used. Appropriate orthogonal mode-coupling relationship for the eigenfunctions of the plate covered region is exploited in the expansion formulas together with the continuity of velocity and pressure for achieving the system of equations and to determine the unknowns. The effects of various physical parameters are analyzed by computing wave load on the structures, plate deflection and flow distribution. It is found that due to the presence of vertical flexible porous membrane, a significant amount of wave force on the plate is reduced. Thus, a cylindrical flexible porous membrane can be implemented to protect the inner circular flexible plate.

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“…Meylan et al [20] used eigenfunction, boundary-element and finite-element method for wave interaction with floating porous elastic plate. Das and Sahoo [21] developed a solution for wave interaction with very large floating elastic plate over viscoelastic bed. Recently, Koley and Sahoo [22] studied oblique wave scattering by horizontal floating flexible porous membrane using Green's function technique.…”

Section: Introductionmentioning

confidence: 99%

Interaction between oblique waves and multiple bottom-standing flexible porous barriers near a rigid wall

Behera

2017

Meccanica

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The interaction between oblique surface waves and multiple bottom-standing flexible porous barriers under the combined effects of a neighboring rigid vertical wall and a step of arbitrary profile on the bottom is investigated. The problem is analyzed under the assumptions of small-amplitude water waves and structural response. The solutions are found using the methods of least-squares approximation, eigenfunction expansion and multi-mode approximation associated with the modified mild-slope equation. To keep the barriers at a desired position of interest, clamped-free or clamped-moored edge conditions are considered. Effects of various wave and structural parameters are studied for single, double and multiple barriers by looking into the reflection coefficient, wave force exerted on the rigid wall, free-surface elevations, and plate deflection of the barriers. The model is validated by comparing with results available in the literature for the special case of wave interaction with single and double rigid porous barriers near a rigid wall in the presence of a vertical step. The study reveals that the presence of multiple flexible porous barriers may effectively reduce the wave reflection and wave force exerted on the rigid wall. Further, full and nearly zero wave reflection can be found in the case of single and/or multiple barriers.

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Hydroelastic analysis of very large floating structure over viscoelastic bed

Cited by 12 publications

References 23 publications

Wave Energy Conversion through Oscillating Water Columns: A Review

Wave Energy Conversion through Oscillating Water Columns: A Review

Mitigation of wave force on a circular flexible plate by a surface-piercing flexible porous barrier

Interaction between oblique waves and multiple bottom-standing flexible porous barriers near a rigid wall

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