Influence of Wave State Uncertainties on   Probabilistic Reliability Assessments of Wave Energy Devices

Simon Ambühl; Jens Peter Kofoed; John Dalsgaard Sørensen

Influence of Wave State Uncertainties on Probabilistic Reliability Assessments of Wave Energy Devices

Simon Ambühl, Jens Peter Kofoed, John Dalsgaard Sørensen

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

Abstract

Probabilistic reliability assessments of wave energy devices (WEDs) need to consider, among others, uncertainties related to the wave states, which are often defined by the significant wave height HS and the peak period TP or the mean crossing wave period TZ or the energy period Te. Based on the JONSWAP spectrum and white noise filtering, wave elevation time series are generated and uncertainties related to the wave states are estimated. In this paper, uncertainties regarding the time series length used to characterize a certain wave state, uncertainties related to the JONSWAP spectrum parameters and the influence on wave state discretization in a scatter diagram are assessed. The estimated uncertainties are then implemented in two generic structural reliability assessments with focus on fatigue and extreme failure modes. The resulting reliability indices are compared with related industries like offshore wind turbines. This paper focus on the Wavestar prototype for reliability assessments. This device is located at DanWEC in Hanstholm (DK).

Original language	English
Title of host publication	10th ewtec 2013 European Wave and Tidal Energy Conference Series : Proceedings of the 10th European Wave and Tidal Energy Conference
Editors	Peter Frigaard, Jens Peter Kofoed, AbuBakr S. Bahaj, Lars Bergdahl, Alain Clément, Daniel Conley, Antonio F. O. Falcão, Cameron MacLeod Johnstone, Lucia Margheritini, Ian Masters, António José Sarmento, Diego Vicinanza
Number of pages	11
Place of Publication	Aalborg
Publisher	Technical Committee of the European Wave and Tidal Energy Conference
Publication date	2013
Publication status	Published - 2013
Event	European Wave and Tidal Energy Conference - Aalborg, Denmark Duration: 2 Sept 2013 → 5 Sept 2013 Conference number: 10

Conference

Conference	European Wave and Tidal Energy Conference
Number	10
Country/Territory	Denmark
City	Aalborg
Period	02/09/2013 → 05/09/2013

Series	European Wave and Tidal Energy Conference Series
Number	10

Bibliographical note

The proceedings is published on a usb.

Keywords

Extreme events
Fatigue
Reliability
Uncertainties
Wave Energy Device

Access to Document

http://www.ewtec.org/ewtec2013

AUB Link

Search for the material in Aalborg University Library's search engine

Cite this

Ambühl, S., Kofoed, J. P., & Sørensen, J. D. (2013). Influence of Wave State Uncertainties on Probabilistic Reliability Assessments of Wave Energy Devices. In P. Frigaard, J. P. Kofoed, A. S. Bahaj, L. Bergdahl, A. Clément, D. Conley, A. F. O. Falcão, C. M. Johnstone, L. Margheritini, I. Masters, A. J. Sarmento, & D. Vicinanza (Eds.), 10th ewtec 2013 European Wave and Tidal Energy Conference Series: Proceedings of the 10th European Wave and Tidal Energy Conference Technical Committee of the European Wave and Tidal Energy Conference. http://www.ewtec.org/ewtec2013

Ambühl, Simon ; Kofoed, Jens Peter ; Sørensen, John Dalsgaard. / Influence of Wave State Uncertainties on Probabilistic Reliability Assessments of Wave Energy Devices. 10th ewtec 2013 European Wave and Tidal Energy Conference Series: Proceedings of the 10th European Wave and Tidal Energy Conference. editor / Peter Frigaard ; Jens Peter Kofoed ; AbuBakr S. Bahaj ; Lars Bergdahl ; Alain Clément ; Daniel Conley ; Antonio F. O. Falcão ; Cameron MacLeod Johnstone ; Lucia Margheritini ; Ian Masters ; António José Sarmento ; Diego Vicinanza. Aalborg : Technical Committee of the European Wave and Tidal Energy Conference, 2013. (European Wave and Tidal Energy Conference Series; No. 10).

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title = "Influence of Wave State Uncertainties on Probabilistic Reliability Assessments of Wave Energy Devices",

abstract = "Probabilistic reliability assessments of wave energy devices (WEDs) need to consider, among others, uncertainties related to the wave states, which are often defined by the significant wave height HS and the peak period TP or the mean crossing wave period TZ or the energy period Te. Based on the JONSWAP spectrum and white noise filtering, wave elevation time series are generated and uncertainties related to the wave states are estimated. In this paper, uncertainties regarding the time series length used to characterize a certain wave state, uncertainties related to the JONSWAP spectrum parameters and the influence on wave state discretization in a scatter diagram are assessed. The estimated uncertainties are then implemented in two generic structural reliability assessments with focus on fatigue and extreme failure modes. The resulting reliability indices are compared with related industries like offshore wind turbines. This paper focus on the Wavestar prototype for reliability assessments. This device is located at DanWEC in Hanstholm (DK).",

keywords = "Extreme events, Fatigue, Reliability, Uncertainties, Wave Energy Device, Extreme events, Fatigue, Reliability, Uncertainties, Wave Energy Device",

author = "Simon Amb{\"u}hl and Kofoed, {Jens Peter} and S{\o}rensen, {John Dalsgaard}",

note = "The proceedings is published on a usb.; European Wave and Tidal Energy Conference, EWTEC ; Conference date: 02-09-2013 Through 05-09-2013",

year = "2013",

language = "English",

series = "European Wave and Tidal Energy Conference Series",

publisher = "Technical Committee of the European Wave and Tidal Energy Conference",

number = "10",

editor = "Peter Frigaard and Kofoed, {Jens Peter} and Bahaj, {AbuBakr S.} and Lars Bergdahl and Alain Cl{\'e}ment and Daniel Conley and Falc{\~a}o, {Antonio F. O.} and Johnstone, {Cameron MacLeod} and Lucia Margheritini and Ian Masters and Sarmento, {Ant{\'o}nio Jos{\'e}} and Diego Vicinanza",

booktitle = "10th ewtec 2013 European Wave and Tidal Energy Conference Series",

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Ambühl, S, Kofoed, JP & Sørensen, JD 2013, Influence of Wave State Uncertainties on Probabilistic Reliability Assessments of Wave Energy Devices. in P Frigaard, JP Kofoed, AS Bahaj, L Bergdahl, A Clément, D Conley, AFO Falcão, CM Johnstone, L Margheritini, I Masters, AJ Sarmento & D Vicinanza (eds), 10th ewtec 2013 European Wave and Tidal Energy Conference Series: Proceedings of the 10th European Wave and Tidal Energy Conference. Technical Committee of the European Wave and Tidal Energy Conference, Aalborg, European Wave and Tidal Energy Conference Series, no. 10, European Wave and Tidal Energy Conference, Aalborg, Denmark, 02/09/2013. <http://www.ewtec.org/ewtec2013>

Influence of Wave State Uncertainties on Probabilistic Reliability Assessments of Wave Energy Devices. / Ambühl, Simon; Kofoed, Jens Peter; Sørensen, John Dalsgaard.
10th ewtec 2013 European Wave and Tidal Energy Conference Series: Proceedings of the 10th European Wave and Tidal Energy Conference. ed. / Peter Frigaard; Jens Peter Kofoed; AbuBakr S. Bahaj; Lars Bergdahl; Alain Clément; Daniel Conley; Antonio F. O. Falcão; Cameron MacLeod Johnstone; Lucia Margheritini; Ian Masters; António José Sarmento; Diego Vicinanza. Aalborg: Technical Committee of the European Wave and Tidal Energy Conference, 2013. (European Wave and Tidal Energy Conference Series; No. 10).

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

TY - GEN

T1 - Influence of Wave State Uncertainties on Probabilistic Reliability Assessments of Wave Energy Devices

AU - Ambühl, Simon

AU - Kofoed, Jens Peter

AU - Sørensen, John Dalsgaard

N1 - Conference code: 10

PY - 2013

Y1 - 2013

N2 - Probabilistic reliability assessments of wave energy devices (WEDs) need to consider, among others, uncertainties related to the wave states, which are often defined by the significant wave height HS and the peak period TP or the mean crossing wave period TZ or the energy period Te. Based on the JONSWAP spectrum and white noise filtering, wave elevation time series are generated and uncertainties related to the wave states are estimated. In this paper, uncertainties regarding the time series length used to characterize a certain wave state, uncertainties related to the JONSWAP spectrum parameters and the influence on wave state discretization in a scatter diagram are assessed. The estimated uncertainties are then implemented in two generic structural reliability assessments with focus on fatigue and extreme failure modes. The resulting reliability indices are compared with related industries like offshore wind turbines. This paper focus on the Wavestar prototype for reliability assessments. This device is located at DanWEC in Hanstholm (DK).

AB - Probabilistic reliability assessments of wave energy devices (WEDs) need to consider, among others, uncertainties related to the wave states, which are often defined by the significant wave height HS and the peak period TP or the mean crossing wave period TZ or the energy period Te. Based on the JONSWAP spectrum and white noise filtering, wave elevation time series are generated and uncertainties related to the wave states are estimated. In this paper, uncertainties regarding the time series length used to characterize a certain wave state, uncertainties related to the JONSWAP spectrum parameters and the influence on wave state discretization in a scatter diagram are assessed. The estimated uncertainties are then implemented in two generic structural reliability assessments with focus on fatigue and extreme failure modes. The resulting reliability indices are compared with related industries like offshore wind turbines. This paper focus on the Wavestar prototype for reliability assessments. This device is located at DanWEC in Hanstholm (DK).

KW - Extreme events

KW - Fatigue

KW - Reliability

KW - Uncertainties

KW - Wave Energy Device

KW - Extreme events

KW - Fatigue

KW - Reliability

KW - Uncertainties

KW - Wave Energy Device

M3 - Article in proceeding

T3 - European Wave and Tidal Energy Conference Series

BT - 10th ewtec 2013 European Wave and Tidal Energy Conference Series

A2 - Frigaard, Peter

A2 - Kofoed, Jens Peter

A2 - Bahaj, AbuBakr S.

A2 - Bergdahl, Lars

A2 - Clément, Alain

A2 - Conley, Daniel

A2 - Falcão, Antonio F. O.

A2 - Johnstone, Cameron MacLeod

A2 - Margheritini, Lucia

A2 - Masters, Ian

A2 - Sarmento, António José

A2 - Vicinanza, Diego

PB - Technical Committee of the European Wave and Tidal Energy Conference

CY - Aalborg

T2 - European Wave and Tidal Energy Conference

Y2 - 2 September 2013 through 5 September 2013

ER -

Ambühl S, Kofoed JP, Sørensen JD. Influence of Wave State Uncertainties on Probabilistic Reliability Assessments of Wave Energy Devices. In Frigaard P, Kofoed JP, Bahaj AS, Bergdahl L, Clément A, Conley D, Falcão AFO, Johnstone CM, Margheritini L, Masters I, Sarmento AJ, Vicinanza D, editors, 10th ewtec 2013 European Wave and Tidal Energy Conference Series: Proceedings of the 10th European Wave and Tidal Energy Conference. Aalborg: Technical Committee of the European Wave and Tidal Energy Conference. 2013. (European Wave and Tidal Energy Conference Series; No. 10).