123456789_123456789_1123456789Wind Turbine Foundation Software

Model Examples
ICDAS WTF 2017.00R

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The space frame foundations are referred to jacket, tripod

and also four legged steel lattice structures, Figure 2 and 3.

They are most suitable for deep water especially jacket

structures can be up to 70m water depth and having a

structural dimension of 25x60m, Figure 6.


The space frame foundations can also refer to gravity tripod
foundation as shown in Figure 4. It is used in transitional
depth of 10-40 m, and consist of two heavy concrete
structures connected by three legs, one structure sitting on
the seabed while the other is above the water, 
cf. Tethys. 


Figure 4Gravity tripod foundation

                 Source: Tethys.

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  Floating structure foundations are used in deep depth
applications (40-900 m) and consist of a balanced floating
structure moored to the seabed with fixed cables. The
floating structure may be stabilized using buoyancy, the
mooring lines, or a ballast. The mooring lines may cause
minor scouring or a potential for collision. Transmission
lines also produce an electromagnetic field that may be
harmful to some marine organisms, cf. 

Figure 5: Floating structure foundation
                 Source: Tethys.

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Foundation sizes and weights


During the last 24 years since 1990, wind turbines
have increased significantly in size and performance
with only a small increase in the weight of the wind
turbine components. This means that the structural
system becomes more flexible and thus more
sensitive to dynamic excitations at low frequencies.
Thus, the dynamic response of wind turbines is
affected by the properties of the foundation and
the subsoil, cf. [14.00].

Figure 6: Foundations type after water depth.




Figure 7: Wind turbine class 5, 6 and 8MW

                 Source: navitusbaywindpark.co.uk




Concepts of gravity base foundations, Univ.-Prof. Dr.-Ing Steffen Marx, Institute of Concrete Construction, Leibniz University Hannover.



Assessment of dynamic substructuring of a wind turbine foundation applicable for

aeroelastic simulationsM. Damgaard1, L. V. Andersen2 and L. B. Ibsen2

1 Technology and Engineering Solutions, Vestas Wind Systems A/S, Denmark

2 Department of Civil Engineering, Aalborg University, Denmark

Published online in Wiley Online Library.

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