Reduction of hydroelastic responses of a very-long floating structure by a floating oscillating-water-column breakwater system

Hong, Do-Chun; Hong, Sa Young; Hong, Seok-Won

doi:10.1016/j.oceaneng.2005.06.005

Cited by 34 publications

(11 citation statements)

References 6 publications

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“…Gayen et al [28] studied the scattering of water waves by a strip of ice in deep water. Hong et al [29] discussed the efficiency of a floating breakwater system in reducing the response of a VLFS. Manam et al [30] derived the generalized form of the expansion formulae and the corresponding orthogonal mode-coupling relations using Fourier analysis for both finite and infinite water depths to deal with higher-order boundary conditions that arise during wave interaction with floating ice sheet or VLFS.…”

Section: Introductionmentioning

confidence: 99%

Flexural gravity wave over a floating ice sheet near a vertical wall

Bhattacharjee

Soares

2011

J Eng Math

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The behavior of flexural gravity waves propagating over a semi-infinite floating ice sheet is studied under the assumptions of small amplitude linear wave theory. The vertical wall is assumed to be either fixed or harmonically oscillating with constant horizontal displacement, in which case the problem is analogous with a harmonically oscillating plane vertical wavemaker. The potential flow approach is adhered to and the higher-order mode-coupling relations are applied to determine the unknown coefficients present in the Fourier expansion formula of the potential functions. The ice sheet is modeled as a thin semi-infinite elastic beam. Three different edge conditions are applied at the finite edge of the floating ice sheet. The effects of different edge conditions, the thickness of the ice sheet and the water depth on the surface strain, the shear force along the ice sheet, the horizontal force on the vertical wall, and the flexural gravity wave profile are analyzed in detail.

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Section: Introductionmentioning

confidence: 99%

Flexural gravity wave over a floating ice sheet near a vertical wall

Bhattacharjee

Soares

2011

J Eng Math

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“…The traditional way is using breakwaters which reduce the height of incident water waves. The breakwaters may be a bottom-founded [20] or a floating oscillating-water-column (OWC) [21,22]. Hong et al [21] found that the length of the horizontal plate in the floating OWC has a significant influence on the reduction of the hydroelastic response of the floating structure.…”

Section: Hydroelastic Reductionmentioning

confidence: 99%

“…The breakwaters may be a bottom-founded [20] or a floating oscillating-water-column (OWC) [21,22]. Hong et al [21] found that the length of the horizontal plate in the floating OWC has a significant influence on the reduction of the hydroelastic response of the floating structure. Based on these findings, they suggested that a reverse T-shape floating breakwater may be an interesting alternative for protecting a VLFS.…”

Section: Hydroelastic Reductionmentioning

confidence: 99%

Reducing Hydroelastic Response of Very Large Floating Structure: A Literature Review

Tavana¹,

Khanjani²

2013

IJCA

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Floating structure is applied as floating wave breaker, floating airport and etc. Applications of these structures rise because of being environmental friendly and fast construction. To design floating structure first step is hydrodynamic analysis under wave effect. As the depth of structure is too smaller than the other dimensions, this structure behaves elastically. Hydroelastic analysis is used to obtain its deformation under wave action. Reduction of the hydroelastic responses may increase serviceability and safety. There are many ways to reduce the hydroelastic response of VLFS. This paper was considered the analysis and hydroelastic reduction of VLFS.

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“…Many innovative methods have thus been proposed for minimizing the hydroelastic motions and loads [14]. Bottom-founded-type or floating-type breakwaters, even the body-attached porous plates are conventionally used to attenuate the wave forces that act on a VLFS [15,16,17]. The installation of an Oscillating Water Column (OWC) device near a pontoon-type VLFS has also been proposed to effectively reduce the hydroelastic response and enable the use of the VLFS in open seas [18].…”

Section: Introductionmentioning

confidence: 99%

Performance characteristics of a conceptual ring-shaped spar-type VLFS with double-layered perforated-wall breakwater

Kou

Xiao

Tao

et al. 2019

Applied Ocean Research

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A ring-shaped spar-type Very Large Floating Structure (VLFS) is proposed as an intermediate base for supporting deepwater resource exploitation far away from the coast line. The proposed VLFS is composed of eight rigidly connected deep-draft spar-type modules and an inside harbor. A double-layered perforated-wall breakwater is vertically attached to the VLFS and pierces through the water surface to attenuate the wave energy in the inside harbor. The hydrodynamic performance characteristics of the ring-shaped VLFS was experimentally evaluated in the present study, focusing on the motion responses, wave elevations, and wave run-ups. The natural periods of the motions in vertical plane were determined to be larger than 40s, which is much larger than common wave periods. This enhanced the motion performance in vertical plane and afforded favorable habitation and operation condition on the VLFS. A large surge damping was induced by the vertical breakwater, which tended to significantly affect the surge and pitch motions, but had a negligible effect on the heave motion. The component frequencies of the wave elevations in the inside harbor and the wave run-ups were identical with those of the incident waves. The wave attenuation was frequency-dependent and effective for the common wave frequencies, with a smaller loss coefficient observed in higher sea state. The wave attenuation and wave run-ups tended to improve in the absence of the leeward walls.

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Reduction of hydroelastic responses of a very-long floating structure by a floating oscillating-water-column breakwater system

Cited by 34 publications

References 6 publications

Flexural gravity wave over a floating ice sheet near a vertical wall

Flexural gravity wave over a floating ice sheet near a vertical wall

Reducing Hydroelastic Response of Very Large Floating Structure: A Literature Review

Performance characteristics of a conceptual ring-shaped spar-type VLFS with double-layered perforated-wall breakwater

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