Fatigue Analysis of a Wave Energy Converter Taking into Account Different Control Strategies

Andrew Stephen Zurkinden, Søren Heide Lambertsen, Lars Damkilde, Zhen Gao, Torgeir Moan

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

3 Citationer (Scopus)

Resumé

Point absorber wave energy converters (WEC) are subjected to random wave loads. In addition, the power production of a WEC and the motions are considerably influenced by the applied control mechanism. For small waves, with a wave period close to the natural period of the oscillating system, the power output may be controlled passively by means of a constant damping coefficient. The energy is extracted proportionally to the square of the body′s velocity. If the wave period is away from the natural period, reactive power may be applied in order to enlarge the resonance bandwidth. Recent studies on a point absorber have shown that the stresses at a particular section of the structure depend on the control parameters. The power is increased by choosing a more advanced control mechanism. The consequences are that the stress amplitudes are higher than for the more conservative control case. In this study, the focus is given on the fatigue damage calculation of a structural detail by taking into account the control parameters of the power take-off system. The predicted fatigue damage is calculated based on the spectral approach. Finally the question will be answered which control strategy is more favorable regarding the trade off between the fatigue damage and power production of the wave energy device.
OriginalsprogEngelsk
TitelASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering : Ocean Renewable Energy
Antal sider8
Vol/bind8
ForlagAmerican Society of Mechanical Engineers
Publikationsdato2013
ISBN (Trykt)978-0-7918-5542-3
DOI
StatusUdgivet - 2013
BegivenhedASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering - Nantes, Frankrig
Varighed: 9 jun. 201314 jun. 2013
Konferencens nummer: 32

Konference

KonferenceASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering
Nummer32
LandFrankrig
ByNantes
Periode09/06/201314/06/2013

Fingerprint

Fatigue of materials
Fatigue damage
Takeoff
Reactive power
Damping
Bandwidth

Emneord

  • Fatigue Analysis
  • Wave Energy Converter
  • Control Strategies

Citer dette

Zurkinden, A. S., Lambertsen, S. H., Damkilde, L., Gao, Z., & Moan, T. (2013). Fatigue Analysis of a Wave Energy Converter Taking into Account Different Control Strategies. I ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering: Ocean Renewable Energy (Bind 8). American Society of Mechanical Engineers. https://doi.org/10.1115/OMAE2013-10864
Zurkinden, Andrew Stephen ; Lambertsen, Søren Heide ; Damkilde, Lars ; Gao, Zhen ; Moan, Torgeir. / Fatigue Analysis of a Wave Energy Converter Taking into Account Different Control Strategies. ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering: Ocean Renewable Energy. Bind 8 American Society of Mechanical Engineers, 2013.
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title = "Fatigue Analysis of a Wave Energy Converter Taking into Account Different Control Strategies",
abstract = "Point absorber wave energy converters (WEC) are subjected to random wave loads. In addition, the power production of a WEC and the motions are considerably influenced by the applied control mechanism. For small waves, with a wave period close to the natural period of the oscillating system, the power output may be controlled passively by means of a constant damping coefficient. The energy is extracted proportionally to the square of the body′s velocity. If the wave period is away from the natural period, reactive power may be applied in order to enlarge the resonance bandwidth. Recent studies on a point absorber have shown that the stresses at a particular section of the structure depend on the control parameters. The power is increased by choosing a more advanced control mechanism. The consequences are that the stress amplitudes are higher than for the more conservative control case. In this study, the focus is given on the fatigue damage calculation of a structural detail by taking into account the control parameters of the power take-off system. The predicted fatigue damage is calculated based on the spectral approach. Finally the question will be answered which control strategy is more favorable regarding the trade off between the fatigue damage and power production of the wave energy device.",
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Zurkinden, AS, Lambertsen, SH, Damkilde, L, Gao, Z & Moan, T 2013, Fatigue Analysis of a Wave Energy Converter Taking into Account Different Control Strategies. i ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering: Ocean Renewable Energy. bind 8, American Society of Mechanical Engineers, ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering, Nantes, Frankrig, 09/06/2013. https://doi.org/10.1115/OMAE2013-10864

Fatigue Analysis of a Wave Energy Converter Taking into Account Different Control Strategies. / Zurkinden, Andrew Stephen; Lambertsen, Søren Heide; Damkilde, Lars; Gao, Zhen; Moan, Torgeir.

ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering: Ocean Renewable Energy. Bind 8 American Society of Mechanical Engineers, 2013.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

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AU - Zurkinden, Andrew Stephen

AU - Lambertsen, Søren Heide

AU - Damkilde, Lars

AU - Gao, Zhen

AU - Moan, Torgeir

PY - 2013

Y1 - 2013

N2 - Point absorber wave energy converters (WEC) are subjected to random wave loads. In addition, the power production of a WEC and the motions are considerably influenced by the applied control mechanism. For small waves, with a wave period close to the natural period of the oscillating system, the power output may be controlled passively by means of a constant damping coefficient. The energy is extracted proportionally to the square of the body′s velocity. If the wave period is away from the natural period, reactive power may be applied in order to enlarge the resonance bandwidth. Recent studies on a point absorber have shown that the stresses at a particular section of the structure depend on the control parameters. The power is increased by choosing a more advanced control mechanism. The consequences are that the stress amplitudes are higher than for the more conservative control case. In this study, the focus is given on the fatigue damage calculation of a structural detail by taking into account the control parameters of the power take-off system. The predicted fatigue damage is calculated based on the spectral approach. Finally the question will be answered which control strategy is more favorable regarding the trade off between the fatigue damage and power production of the wave energy device.

AB - Point absorber wave energy converters (WEC) are subjected to random wave loads. In addition, the power production of a WEC and the motions are considerably influenced by the applied control mechanism. For small waves, with a wave period close to the natural period of the oscillating system, the power output may be controlled passively by means of a constant damping coefficient. The energy is extracted proportionally to the square of the body′s velocity. If the wave period is away from the natural period, reactive power may be applied in order to enlarge the resonance bandwidth. Recent studies on a point absorber have shown that the stresses at a particular section of the structure depend on the control parameters. The power is increased by choosing a more advanced control mechanism. The consequences are that the stress amplitudes are higher than for the more conservative control case. In this study, the focus is given on the fatigue damage calculation of a structural detail by taking into account the control parameters of the power take-off system. The predicted fatigue damage is calculated based on the spectral approach. Finally the question will be answered which control strategy is more favorable regarding the trade off between the fatigue damage and power production of the wave energy device.

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Zurkinden AS, Lambertsen SH, Damkilde L, Gao Z, Moan T. Fatigue Analysis of a Wave Energy Converter Taking into Account Different Control Strategies. I ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering: Ocean Renewable Energy. Bind 8. American Society of Mechanical Engineers. 2013 https://doi.org/10.1115/OMAE2013-10864