Numerical procedures for dynamic response and reaction force analysis of a heaving-point absorber wave energy converter

Heo, Sanghwan; Koo, Weoncheol

doi:10.1016/j.oceaneng.2020.107070

Cited by 11 publications

(6 citation statements)

References 15 publications

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“…Zheng et al [22] put forward a theoretical model to analyze wave energy absorption of an OWC semi-embedded in a coastal breakwater based on linear potential flow assumption and matched eigen-function expansion method (MEFEM). Heo and Koo [23] calculated the power capture performance of a heaving-buoy WEC connected to a fixed jacket platform and reaction loads between two bodies using the WAMIT software.…”

Section: Introductionmentioning

confidence: 99%

Energy conversion and hydrodynamic analysis of multi-degree-of-freedom wave energy converters integrated into a semi-submersible platform

Cheng

Dai

et al. 2022

Energy Conversion and Management

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Section: Introductionmentioning

confidence: 99%

Energy conversion and hydrodynamic analysis of multi-degree-of-freedom wave energy converters integrated into a semi-submersible platform

Cheng

Dai

et al. 2022

Energy Conversion and Management

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“…They compared the results of the power production and the pressure on the surface of the float. Heo and Koo [18] analyzed the behavior of the two-dimensional Wavestar WECs by performing linear analysis using multi-body dynamics and classical mechanics and calculated the constraint forces acting on the hinge points. Heo and Koo [19] compared the dynamic response and generated power of Wavestar WEC considering the body-nonlinear Froude-Krylov and hydrostatic forces.…”

Section: Introductionmentioning

confidence: 99%

Coupled Dynamic Analysis of a Bottom-Fixed Elastic Platform with Wave Energy Converters in Random Waves

2022

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A Wavestar-type Wave Energy Converter (WEC) on an elastic foundation structure was investigated using an author-developed coupled dynamic analysis computer program. The program included an elastic foundation structure composed of beam elements, a multi-body dynamics model of the entire system, a hydrodynamics model of the dual-buoy, and fully coupled dynamics considering the interaction between the structure and WECs. The selected WEC models a heaving-point-absorber (HPA), one of the oscillating body systems which causes rotational motions of a connecting rod attached to the foundation structure. A rotational-damper-type hydraulic power take-off (PTO) system on the foundation structure produced electricity. The bottom-fixed foundation structure was modeled by three-dimensional beam elements, and the entire system, including HPA, was analyzed by multi-body dynamics. Random wave data at Buan, a nearshore region of Korea, collected by the Korea Meteorological Administration (KMA), was used as a demonstration study using the developed computer programs. Through the case study, the displacement and stress of the foundation structure were increased significantly by the dynamic coupling effects with the WECs, which underscores that the coupled dynamic analysis is essential for a reliable performance evaluation and the design of such a system.

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“…They analyzed the floater arm tip displacement and velocity, as well as the stress distribution of an arm. Heo and Koo [13] performed a linear time-domain analysis of a Wavestar-type WEC using the multibody dynamics formulation in the two-dimensional domain. They compared the time history results with the classical method and reported results that were in good agreement with each other.…”

Section: Introductionmentioning

confidence: 99%

“…A spherical float was used as a WEC model, and the waterplane area of the float was changed in time, so the time-varying nonlinear Froude-Krylov force was updated in every time step to reflect the nonlinear effect. In the previous study [13], for the analysis of the heaving-pointabsorber WEC, an augmented formulation, one of the multibody dynamics techniques, was developed and applied to construct an equation of motion for a two-dimensional plane, and only a linear time-domain analysis was performed. Frequency-dependent hydrodynamic coefficients of a single float and two floats were obtained using the the boundary element method (BEM)-based hydrodynamic solver WAMIT [25].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response Analysis of a Wavestar-Type Wave Energy Converter Using Augmented Formulation in Korean Nearshore Areas

Heo

Koo

2021

Processes

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Interest in water wave power generation, a promising source of renewable energy, is increasing. Numerous types of wave energy converters (WECs) have been designed to transform wave energy into electricity. In this study, we focus on heaving point absorbers (HPAs) of the Wavestar type, which consist of multiple floats connected to a bottom-fixed ocean structure by structural arms and hinges. Each float moves up and down due to wave forces and produces electricity using the hydraulic power take-off (PTO) system connected directly to the float. A numerical procedure using the three-dimensional augmented formulation was developed to calculate the rotational motion of the float. The frequency-dependent coefficients were calculated using the hydrodynamic solver WAMIT. The nonlinear Froude–Krylov and hydrostatic forces were considered. For the environmental conditions, the wave data of four nearshore areas in Korea, obtained from the Korea Meteorological Administration (KMA), were used. Under the given environmental conditions, Buan was found to be the most suitable area among the locations selected for installing a Wavestar-type WEC without considering installation and maintenance costs.

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Numerical procedures for dynamic response and reaction force analysis of a heaving-point absorber wave energy converter

Cited by 11 publications

References 15 publications

Energy conversion and hydrodynamic analysis of multi-degree-of-freedom wave energy converters integrated into a semi-submersible platform

Energy conversion and hydrodynamic analysis of multi-degree-of-freedom wave energy converters integrated into a semi-submersible platform

Coupled Dynamic Analysis of a Bottom-Fixed Elastic Platform with Wave Energy Converters in Random Waves

Dynamic Response Analysis of a Wavestar-Type Wave Energy Converter Using Augmented Formulation in Korean Nearshore Areas

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