from wind and waves. Both foundation structures are in the dimension of 4–5 MW
wind turbines. While the monopile design was calculated for a water depth of 10 m
the tripod design was computed for a water depth of 30 m.
The monopile was calculated and designed with the representative environmental loads from the area of the planed wind farm Nordergründe (see Fig. 11.8).
For the static calculation of the monopile we use the structural analysis program
RSTAB in the version 5.14.191 and the add-on module STEEL from IngenieurSoftware Dlubal GmbH. The 2nd order theory is used to get the results. In
Fig. 11.23a, b the static system, the bending moments and the transverse loads
based on the maximum loads from the wind energy converter are plotted.
Fig. 11.23 a Static system of a monopile, moments and transverse loads including the distribution
of stress; b diagram of the maximum tension at the monopole at different potential longline
connection points. Modified after Buck and Wiemann (unpublished data)
Fig. 11.24 First submerged test longlines in a multi-use-concept by using former
ODAS-foundations, which are located in the vicinity of the offshore wind farm Butendiek.
Modified after Buck et al. 2006b
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wind turbines. While the monopile design was calculated for a water depth of 10 m
the tripod design was computed for a water depth of 30 m.
The monopile was calculated and designed with the representative environmental loads from the area of the planed wind farm Nordergründe (see Fig. 11.8).
For the static calculation of the monopile we use the structural analysis program
RSTAB in the version 5.14.191 and the add-on module STEEL from IngenieurSoftware Dlubal GmbH. The 2nd order theory is used to get the results. In
Fig. 11.23a, b the static system, the bending moments and the transverse loads
based on the maximum loads from the wind energy converter are plotted.
Fig. 11.23 a Static system of a monopile, moments and transverse loads including the distribution
of stress; b diagram of the maximum tension at the monopole at different potential longline
connection points. Modified after Buck and Wiemann (unpublished data)
Fig. 11.24 First submerged test longlines in a multi-use-concept by using former
ODAS-foundations, which are located in the vicinity of the offshore wind farm Butendiek.
Modified after Buck et al. 2006b
11 The German Case Study: Pioneer Projects of Aquaculture …
295