Double Slip Joint connection for Offshore Wind Turbine foundations

Publieke samenvatting

Aanleiding
CAPEX/OPEX of existing offshore wind turbine foundations are high. Costs can be reduced
significantly by the use of a new robust “Double Slip Joint” (DSJ) between the foundation and turbine
tower. Basically this is a continued development of the so called “Slip Joint” (SJ), as already used
decades for small onshore turbines.

Doelstelling
The objective is to design, test and validate a medium scale steel prototype Double Slip Joint connection
by comparing the selfsettling behavior with previous small plastic prototypes. Effects of larger scale, the use of steel and
prototype fabrication method by real machines with realistic tolerances are tested.

Korte omschrijving
Activities will be a joint project of KCI, Van Oord Offshore Wind Projects and SIF. The Dutch test
institute WMC will be selected for the execution of the tests. KCI will design the DSJ prototype and the
test set-up in cooperation with the test institute. SIF will advise about fabrication aspects, and
manufacture and measure the as-built prototype. Van Oord will advise on installation aspects based
on practical experience. The test institute will build the test set-up, calibrate the instrumentation and
execute the tests and report the test measurements. Results will be compared by KCI to previous
results of small scale plastic prototype tests. The earlier developed analytical model and detailed FE
model will be further refined to provide validated design tools for detailed design for present and future
turbines with power rating over 10 MW.

Projectinformatie / Project information

Innovatiethema('s)
Ondersteuningsconstructies.
Subsidieregeling
TSE-16-09-01-Wind op zee R&D project
Stroomschema-onderdelen
Elektriciteitsproductie Met Wind.
Projectnummer
TEWZ116901

Algemene informatie / General information

Penvoerder
KCI the engineers B.V.
Contactpersoon
S. Ahlfors

Projectconsortium / Project consortium