Offshore wind octagon
The offshore wind octagon is a newly developed jacket structure with an octagonal layout based on standardized steel tubes and components, which enables their cost-saving industrial manufacture.
The load-bearing structure comprises an octagonal jacket foundation and tubular tower sections. The eight legs feature horizontal braces at five levels as well as diagonal braces for improved torsional stiffness and demonstrable fatigue resistance. They are fitted in every other field in a helical arrangement around the foundation structure from the top to the bottom level. The diagonal braces counteract the torsion produced by the high torques. The upper section of the jacket structure is connected with a tubular tower. The decisive edge of this design is that it allows standardized industrial production.
Technical Details
| Turbine capacity | 2 - 6 MW |
| Tower head mass | 150 - 350 t |
| Hub height | Up to 140 m |
| Jacket height | Variable |
| Steel tube length | Variable |
| Legs - ∅ tubes | 914 - 1,016 mm |
| Braces - ∅ tubes | 610 - 660 mm |
| Total height of load-bearing structure | Up to 135 m |
| Jacket weight | Up to 250 t |
Advantages of the newly developed structure
- A radical departure from production methods used until now: series production possible, i.e. short production times
- Standardized semi-finished products (uniform length / dimensions)
- Very few different semi-finished products
- 100% Salzgitter material
- Automatic welding of joints
- Standardized mill coating of tubes possible using a state-of-the-art process
- Variable total diameter (thanks to variably sloping tubes)
- High reproducibility / close tolerances
Inquiries
If you have any questions or requirements concerning the Octagon-structure, we will be happy to receive your email at offshore-wind@szmr.de.
