Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 26th International Ocean and Polar Engineering Conference, ISOPE 2016 |
| Editors | Alan M. Wang, Jin S. Chung, Ted Kokkinis, Michael Muskulus |
| Publisher | International Society of Offshore and Polar Engineers |
| Pages | 127-134 |
| Number of pages | 8 |
| ISBN (electronic) | 9781880653883 |
| Publication status | Published - 2016 |
| Event | 26th Annual International Ocean and Polar Engineering Conference, ISOPE 2016 - Rhodes, Greece Duration: 26 Jun 2016 → 1 Jul 2016 |
Publication series
| Name | Proceedings of the International Offshore and Polar Engineering Conference |
|---|---|
| Volume | 2016-January |
| ISSN (Print) | 1098-6189 |
| ISSN (electronic) | 1555-1792 |
Abstract
An effective consideration of the soil characteristics is challenging. Sophisticated soil-structure interaction models have many degrees of freedom and are highly non-linear. Hence, they are not applicable for transient calculations of the design stage due to high computing times. Therefore in a first step, a six-directional, linear approach to consider soil effects is presented which assumes the turbine connected to the soil by inertial and elastic coupling terms. Results of jackets with piles and suction buckets are presented and show significant shifts of the eigenfrequencies compared to approaches with substructures clamped to the seabed. In a second step, a piecewise defined response surface has been developed in order to take the operating point into account. It correlates the previously known environmental conditions with the loads required for calculating the interaction matrices. This approximation has been proven to be accurate enough in this context and led to a further shift of the eigenfrequencies compared to results with no loads applied.
Keywords
- Component-modesynthesis, Fast, Load approximation, Offshore substructure, Soil-structure interaction
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 26th International Ocean and Polar Engineering Conference, ISOPE 2016. ed. / Alan M. Wang; Jin S. Chung; Ted Kokkinis; Michael Muskulus. International Society of Offshore and Polar Engineers, 2016. p. 127-134 (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 2016-January).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Effective consideration of soil characteristics in time domain simulations of bottom fixed offshore wind turbines
AU - Hubler, Clemens
AU - Hafele, Jan
AU - Ehrmann, Andreas
AU - Rolfes, Raimund
N1 - Funding information: We gratefully acknowledge the financial support of the German Federal Ministry for Economic Affairs and Energy (research projects GIGAWIND LIFE and MONITORING SUCTION BUCKET JACKET, FKZ 0325575A and FKZ 0325766A) and the European Commission (research projects IRPWIND and INNWIND.EU, funded from the European Union's Seventh Framework Programme for research, technological development and demonstration under grant agreement numbers 609795 and 308974) that enabled this work.
PY - 2016
Y1 - 2016
N2 - An effective consideration of the soil characteristics is challenging. Sophisticated soil-structure interaction models have many degrees of freedom and are highly non-linear. Hence, they are not applicable for transient calculations of the design stage due to high computing times. Therefore in a first step, a six-directional, linear approach to consider soil effects is presented which assumes the turbine connected to the soil by inertial and elastic coupling terms. Results of jackets with piles and suction buckets are presented and show significant shifts of the eigenfrequencies compared to approaches with substructures clamped to the seabed. In a second step, a piecewise defined response surface has been developed in order to take the operating point into account. It correlates the previously known environmental conditions with the loads required for calculating the interaction matrices. This approximation has been proven to be accurate enough in this context and led to a further shift of the eigenfrequencies compared to results with no loads applied.
AB - An effective consideration of the soil characteristics is challenging. Sophisticated soil-structure interaction models have many degrees of freedom and are highly non-linear. Hence, they are not applicable for transient calculations of the design stage due to high computing times. Therefore in a first step, a six-directional, linear approach to consider soil effects is presented which assumes the turbine connected to the soil by inertial and elastic coupling terms. Results of jackets with piles and suction buckets are presented and show significant shifts of the eigenfrequencies compared to approaches with substructures clamped to the seabed. In a second step, a piecewise defined response surface has been developed in order to take the operating point into account. It correlates the previously known environmental conditions with the loads required for calculating the interaction matrices. This approximation has been proven to be accurate enough in this context and led to a further shift of the eigenfrequencies compared to results with no loads applied.
KW - Component-modesynthesis
KW - Fast
KW - Load approximation
KW - Offshore substructure
KW - Soil-structure interaction
UR - http://www.scopus.com/inward/record.url?scp=84987916079&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84987916079
T3 - Proceedings of the International Offshore and Polar Engineering Conference
SP - 127
EP - 134
BT - Proceedings of the 26th International Ocean and Polar Engineering Conference, ISOPE 2016
A2 - Wang, Alan M.
A2 - Chung, Jin S.
A2 - Kokkinis, Ted
A2 - Muskulus, Michael
PB - International Society of Offshore and Polar Engineers
T2 - 26th Annual International Ocean and Polar Engineering Conference, ISOPE 2016
Y2 - 26 June 2016 through 1 July 2016
ER -