Abstract
An extensive model test program has been carried out in order to assess
the behavior of a tension leg moored substructure as support of a
floating offshore wind turbine (FOWT). The floater was inspired by an
industrial design. The tests focused on the ultimate limit state (ULS)
behavior, therefore no aerodynamic or gyroscopic effects were
included, i.e. the turbine hub was represented by a lumped mass, and focus was given to wave forces and dynamic behavior. The model tests have been conducted in the 3D deep water basin of the Hydraulics and Coastal Engineering Laboratory at the University of Aalborg at a scale of 1:80. The model tests were made with a range of monochromatic, bichromatic and irregular waves. All waves are modeled long crested and were run with and without sub and super harmonics. Three different structure layouts were tested, i.e. the tests were run with substructure only, with a rigid tower representation and with a flexible tower representation. Three submerged load cells measured the response of the tendons, and two accelerometers measured the response of the total structure, being located at the substructure – tower interface and in the nacelle. The paper intends to describe the setup of the test and presents some selected interim results.
the behavior of a tension leg moored substructure as support of a
floating offshore wind turbine (FOWT). The floater was inspired by an
industrial design. The tests focused on the ultimate limit state (ULS)
behavior, therefore no aerodynamic or gyroscopic effects were
included, i.e. the turbine hub was represented by a lumped mass, and focus was given to wave forces and dynamic behavior. The model tests have been conducted in the 3D deep water basin of the Hydraulics and Coastal Engineering Laboratory at the University of Aalborg at a scale of 1:80. The model tests were made with a range of monochromatic, bichromatic and irregular waves. All waves are modeled long crested and were run with and without sub and super harmonics. Three different structure layouts were tested, i.e. the tests were run with substructure only, with a rigid tower representation and with a flexible tower representation. Three submerged load cells measured the response of the tendons, and two accelerometers measured the response of the total structure, being located at the substructure – tower interface and in the nacelle. The paper intends to describe the setup of the test and presents some selected interim results.
| Original language | English |
|---|---|
| Title of host publication | The Proceedings of the Twenty-third (2013) International Offshore and Polar Engineering Conference |
| Number of pages | 8 |
| Volume | 1 |
| Publisher | International Society of Offshore & Polar Engineers |
| Publication date | 2013 |
| Pages | 301-308 |
| ISBN (Electronic) | 978-1-880653-99-9 |
| Publication status | Published - 2013 |
| Event | The 23rd International Ocean and Polar Engineering Conference - Anchorage, Alaska, United States Duration: 30 Jun 2013 → 5 Jul 2013 |
Conference
| Conference | The 23rd International Ocean and Polar Engineering Conference |
|---|---|
| Country/Territory | United States |
| City | Anchorage, Alaska |
| Period | 30/06/2013 → 05/07/2013 |
| Series | Proceedings of the International Offshore and Polar Engineering Conference |
|---|---|
| ISSN | 1098-6189 |
Keywords
- Floating Offshore Wind Turbine
- Physical Model Test
- Tension Leg Platform