Hydroelastic analysis of oblique irregular waves with a pontoon-type VLFS edged with dual inclined perforated plates

Cheng, Yong; Ji, Chunyan; Zhai, Gangjun; Gaidai, Oleg

doi:10.1016/j.marstruc.2016.05.008

Cited by 39 publications

(5 citation statements)

References 35 publications

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“…where Ep, i denotes the average generated power of i-th floating breakwater; n is the number of motion period;. The capture efficiency R is an important factor to evaluate the wave energy conversion, and can be expressed as [14] p w E R E = (21) where incident wave energy Ew within one incident wave period can be given by…”

Section: Wave Energy Extractionmentioning

confidence: 99%

“…Thus, many additional devices are proposed to integrate on the weather side of the VLFS for reducing the hydroelastic response of VLFS, which has been described by Wang et al [17]. These devices include auxiliary attachments by Khabakhpasheva and Korobin [18], fixed breakwaters by Ohmatsu [19] or floating breakwaters by Tay et al [20], submerged horizontal/inclined plates by Cheng et al [21], porous barriers by Singla et al [22] and air-cushion structures by Ikoma et al [23]. Motivated by the merits of WECs integrating into marine platforms, Tay [24] proposed a PTO system attached on the hinge connerctors between an articulated plate anti-motion device and a pontoon-type VLFS, and adopted a finite element-boundary element (FE-BE) hybrid method in the frequency domain to illustrate the functions of the articulated plate as both anti-motion device and WEC device.…”

Section: Introductionmentioning

confidence: 99%

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Wave energy extraction and hydroelastic response reduction of modular floating breakwaters as array wave energy converters integrated into a very large floating structure

et al. 2022

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Section: Wave Energy Extractionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wave energy extraction and hydroelastic response reduction of modular floating breakwaters as array wave energy converters integrated into a very large floating structure

et al. 2022

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“…The instantaneous term G 0 is evaluated using the method of Cheng et al [25], and the first order time derivative f G  is expressed in the form:…”

Section: Fluid Partmentioning

confidence: 99%

Investigation of Hydroelastic Behavior of a Pontoon-Type VLFS During Unsteady External Loads in Wave Condition Using a Hybrid Finite Element-Boundary Element (Fe-Me) Method

Cheng

Zhai

et al. 2017

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The hydroelastic behavior of a pontoon-type VLFS subjected to unsteady external loads in wave condition is investigated in the context of the time-domain modal expansion theory, in which the boundary element method (BEM) based on time domain Kelvin sources is used for hydrodynamic forces and the finite element method (FEM) is adopted for solving the deflections of the VLFS. In this analysis, the interpolation-tabulation scheme is applied to assess rapidly and accurately the free-surface Green function in finite water depth, and the boundary integral equation of a quarter VLFS model is further established taking advantage of symmetry of flow field and structure. The VLFS is modeled as an equivalent solid plate based on the Mindlin plate theory. The coupled plate-water model is performed to determine the wave-induced responses and transient behavior under external loads such as a huge mass impact onto the structure and moving loads of an airplane, respectively. These results are verified with existing numerical results and experimental test. Then, the developed numerical tools are used in the study of the combined action taking into account of the mass drop/airplane landing as well as forward or reverse incident wave action. The deflections of the runway, the time history of vertical positions and the trajectory of the airplane are also presented through a systematic time-domain simulation, which illustrates the usefulness of the presently developed numerical solutions.

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“…Two methods were used to investigate the irregular wave, namely those based on extreme response amplitude and most likely extreme response profile. Cheng et al [13] experimentally and numerically investigated the hydroelastic behaviour of a pontoon-type large structure in terms of porosity and submerged depth parameters. The FSI technique is utilised in the numerical model.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of floating structure with coupled Eulerian–Lagrangian technique

Lakušić¹

2022

JCE

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Floating structures are complex systems composed of superstructure, floating-mooring components, and anchors. In this study, the behaviours of a pontoon, which is used as a floating structure, and four mooring elements under different wave loading conditions were investigated. A numerical analysis of the coupled motions of the pontoon, mooring lines, and marine environment was performed. While the mooring lines were modelled as wire elements, the pontoon was modelled as a rigid body with six degrees of freedom. Wave loading conditions were represented using two different wave spectra. The first spectrum (Case I) was generated based on a single sinusoidal wave utilising the JONSWAP spectrum, whereas the second one (Case II) was generated based a superimposed multi-sinusoidal wave. Time-varying motions of the pontoon and tensions of the mooring lines were determined based on the numerical analyses for Cases I and II. Critical values were determined using the results of both cases. The numerical solutions were based on bidirectional fluid–structure interaction (FSI) analysis. A fully non-linear free surface simulation was performed using the coupled Eulerian–Lagrangian (CEL) technique. Furthermore, numerical results were compared with the results obtained from analytical solutions of free surface elevations.

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Hydroelastic analysis of oblique irregular waves with a pontoon-type VLFS edged with dual inclined perforated plates

Cited by 39 publications

References 35 publications

Wave energy extraction and hydroelastic response reduction of modular floating breakwaters as array wave energy converters integrated into a very large floating structure

Wave energy extraction and hydroelastic response reduction of modular floating breakwaters as array wave energy converters integrated into a very large floating structure

Investigation of Hydroelastic Behavior of a Pontoon-Type VLFS During Unsteady External Loads in Wave Condition Using a Hybrid Finite Element-Boundary Element (Fe-Me) Method

Numerical modelling of floating structure with coupled Eulerian–Lagrangian technique

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