Umbilical Fatigue Analysis for a Wave Energy Converter

2021 ◽  
Author(s):  
Yi-Hsiang Yu ◽  
Billy Ballard ◽  
Jennifer van Rij
Keyword(s):  
Wave Energy ◽  
Fatigue Analysis ◽  
Wave Energy Converter ◽  
Energy Converter

Fatigue Analysis of a Point Absorber Wave Energy Converter Subjected to Passive and Reactive Control

2015 ◽  
Vol 137 (5) ◽  
Author(s):  
A. S. Zurkinden ◽  
S. H. Lambertsen ◽  
L. Damkilde ◽  
Z. Gao ◽  
T. Moan
Keyword(s):  
Fatigue Damage ◽  
Wave Energy ◽  
Stress Responses ◽  
Fatigue Analysis ◽  
Wave Energy Converter ◽  
Wave Loads ◽  
Reactive Control ◽  
Energy Converter ◽  
Set Up ◽  
Frequency Domain Approach

This paper investigates the effect of a passive and reactive control mechanism on the accumulated fatigue damage of a wave energy converter (WEC). Interest is focused on four structural details of the Wavestar arm, which is used as a case study here. The fatigue model is set up as an independent and generic toolbox, which can be applied to any other global response model of a WEC device combined with a control system. The stress responses due to the stochastic wave loads are computed by a finite element method (FEM) model using the frequency-domain approach. The fatigue damage is calculated based on the spectral-based fatigue analysis in which the fatigue is described by the given spectral moments of the stress response. The question will be discussed, which control case is more favorable regarding the tradeoff between fatigue damage reduction and increased power production.

Umbilical Fatigue Analysis for a Wave Energy Converter

2021 ◽  
Author(s):  
Yi-Hsiang Yu ◽  
Billy Ballard ◽  
Jennifer van Rij
Keyword(s):  
Wave Energy ◽  
Fatigue Analysis ◽  
Wave Energy Converter ◽  
Energy Converter

scholarly journals A comparison of coupled and de-coupled simulation procedures for the fatigue analysis of wave energy converter mooring lines

2016 ◽  
Vol 117 ◽  
pp. 332-345 ◽  
Author(s):  
Shun-Han Yang ◽  
Jonas W. Ringsberg ◽  
Erland Johnson ◽  
ZhiQiang Hu ◽  
Johannes Palm
Keyword(s):  
Wave Energy ◽  
Fatigue Analysis ◽  
Wave Energy Converter ◽  
Coupled Simulation ◽  
Energy Converter ◽  
Mooring Lines

Hydrodynamic analysis of a novel wave energy converter: Hull Reservoir Wave Energy Converter (HRWEC)

2021 ◽  
Vol 170 ◽  
pp. 1020-1039
Author(s):  
S.D.G.S.P. Gunawardane ◽  
G.A.C.T. Bandara ◽  
Young-Ho Lee
Keyword(s):  
Wave Energy ◽  
Wave Energy Converter ◽  
Energy Converter ◽  
Hydrodynamic Analysis

scholarly journals A Piezoelectric Wave-Energy Converter Equipped with a Geared-Linkage-Based Frequency Up-Conversion Mechanism

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 204
Author(s):  
Shao-En Chen ◽  
Ray-Yeng Yang ◽  
Guang-Kai Wu ◽  
Chia-Che Wu
Keyword(s):  
Power Generation ◽  
Wave Energy ◽  
Wave Motion ◽  
Wave Energy Converter ◽  
Gear Train ◽  
Piezoelectric Composite ◽  
Maximum Height ◽  
Resistive Load ◽  
Linkage Mechanism ◽  
Energy Converter

In this paper, a piezoelectric wave-energy converter (PWEC), consisting of a buoy, a frequency up-conversion mechanism, and a piezoelectric power-generator component, is developed. The frequency up-conversion mechanism consists of a gear train and geared-linkage mechanism, which converted lower frequencies of wave motion into higher frequencies of mechanical motion. The slider had a six-period displacement compared to the wave motion and was used to excite the piezoelectric power-generation component. Therefore, the operating frequency of the piezoelectric power-generation component was six times the frequency of the wave motion. The developed, flexible piezoelectric composite films of the generator component were used to generate electrical voltage. The piezoelectric film was composed of a copper/nickel foil as the substrate, lead–zirconium–titanium (PZT) material as the piezoelectric layer, and silver material as an upper-electrode layer. The sol-gel process was used to fabricate the PZT layer. The developed PWEC was tested in the wave flume at the Tainan Hydraulics Laboratory, Taiwan (THL). The maximum height and the minimum period were set to 100 mm and 1 s, respectively. The maximum voltage of the measured value was 2.8 V. The root-mean-square (RMS) voltage was 824 mV, which was measured through connection to an external 495 kΩ resistive load. The average electric power was 1.37 μW.

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