Design of support structures for offshore wind turbines - Wind Power Generation and Wind Turbine Design - page 576

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0

6 8 10 12 14

Wind Speed [m/s]

Figure 23: Wind shear profi le according to logarithmic profi le and power law.

Figure 24 : Various turbulence intensity models [ 4 ].

for the turbulence is given by the turbulence intensity I , which is defi ned as a func-
tion of the standard deviation and the mean wind speed as shown in the following
equation:

s
=⋅

[]

I 100 % ( 12)

V

Recommended values for the turbulence intensity are given by various design
standards. Figure 24 shows some turbulence intensity descriptions. It shows that
the turbulence intensity is much higher onshore than offshore.