Details
Original language | English |
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Title of host publication | Proceedings of the 25th International Ocean and Polar Engineering Conference, ISOPE 2015 |
Publisher | International Society of Offshore and Polar Engineers |
Pages | 489-496 |
Number of pages | 8 |
ISBN (electronic) | 9781880653890 |
Publication status | Published - 2015 |
Event | 25th International Ocean and Polar Engineering Conference, ISOPE 2015 - Kona, Big Island, United States Duration: 21 Jun 2015 → 26 Jun 2015 |
Publication series
Name | Proceedings of the International Offshore and Polar Engineering Conference |
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Volume | 2015-January |
ISSN (Print) | 1098-6189 |
ISSN (electronic) | 1555-1792 |
Abstract
The correlation and direction dependence of extreme wind and wave load parameters with return periods of 50 or 100 years are hardly known. Existing approaches to determine these parameters are based on numerically simulated data or on combined data from different measurement locations. With the measurement platform FINO 1 synchronously measured time series of these parameters recorded over more than ten years in the German Bight are available for the first time. Measurement based investigations of the correlation and directional dependence of extreme load parameters are now possible. First evaluations indicate that extreme wind events often do not coincide with extreme sea state conditions. Direction dependencies of extreme wind speed and significant wave height were also detected. To analyze extreme rectified load effects the measurement data are subdivided into direction sectors. To extrapolate directionally dependent load parameters, different methods of extreme value analysis are used, taking different statistical population sizes into account. These directional extreme events are compared to each other and to extreme events without directional subdivision. As a result, ratio values of directionally dependent and independent extreme values of relevant load parameters are available. Thus, the influence of direction on the individual load parameters is quantified and the intensity of several rectified load effects can be estimated.
Keywords
- Design wave, Direction dependence, Offshore wind energy, Rectified loads, Sea state statistics, Waves, Wind
ASJC Scopus subject areas
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Ocean Engineering
- Engineering(all)
- Mechanical Engineering
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Proceedings of the 25th International Ocean and Polar Engineering Conference, ISOPE 2015. International Society of Offshore and Polar Engineers, 2015. p. 489-496 (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 2015-January).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Directional dependence of extreme load parameters for offshore wind turbines
AU - Schmidt, Boso
AU - Hansen, Michael
AU - Marx, Steffen
N1 - Publisher Copyright: Copyright © 2015 by the International Society of Offshore and Polar Engineers (ISOPE). Copyright: Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015
Y1 - 2015
N2 - The correlation and direction dependence of extreme wind and wave load parameters with return periods of 50 or 100 years are hardly known. Existing approaches to determine these parameters are based on numerically simulated data or on combined data from different measurement locations. With the measurement platform FINO 1 synchronously measured time series of these parameters recorded over more than ten years in the German Bight are available for the first time. Measurement based investigations of the correlation and directional dependence of extreme load parameters are now possible. First evaluations indicate that extreme wind events often do not coincide with extreme sea state conditions. Direction dependencies of extreme wind speed and significant wave height were also detected. To analyze extreme rectified load effects the measurement data are subdivided into direction sectors. To extrapolate directionally dependent load parameters, different methods of extreme value analysis are used, taking different statistical population sizes into account. These directional extreme events are compared to each other and to extreme events without directional subdivision. As a result, ratio values of directionally dependent and independent extreme values of relevant load parameters are available. Thus, the influence of direction on the individual load parameters is quantified and the intensity of several rectified load effects can be estimated.
AB - The correlation and direction dependence of extreme wind and wave load parameters with return periods of 50 or 100 years are hardly known. Existing approaches to determine these parameters are based on numerically simulated data or on combined data from different measurement locations. With the measurement platform FINO 1 synchronously measured time series of these parameters recorded over more than ten years in the German Bight are available for the first time. Measurement based investigations of the correlation and directional dependence of extreme load parameters are now possible. First evaluations indicate that extreme wind events often do not coincide with extreme sea state conditions. Direction dependencies of extreme wind speed and significant wave height were also detected. To analyze extreme rectified load effects the measurement data are subdivided into direction sectors. To extrapolate directionally dependent load parameters, different methods of extreme value analysis are used, taking different statistical population sizes into account. These directional extreme events are compared to each other and to extreme events without directional subdivision. As a result, ratio values of directionally dependent and independent extreme values of relevant load parameters are available. Thus, the influence of direction on the individual load parameters is quantified and the intensity of several rectified load effects can be estimated.
KW - Design wave
KW - Direction dependence
KW - Offshore wind energy
KW - Rectified loads
KW - Sea state statistics
KW - Waves
KW - Wind
UR - http://www.scopus.com/inward/record.url?scp=84944683829&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84944683829
T3 - Proceedings of the International Offshore and Polar Engineering Conference
SP - 489
EP - 496
BT - Proceedings of the 25th International Ocean and Polar Engineering Conference, ISOPE 2015
PB - International Society of Offshore and Polar Engineers
T2 - 25th International Ocean and Polar Engineering Conference, ISOPE 2015
Y2 - 21 June 2015 through 26 June 2015
ER -