Environmental Engineering Reference
In-Depth Information
6.1b
EWM
V
hub
¼
V
e,50
steady wind model
H
¼
H
red,50
Wind/wave
misalignment
UE
6.1c
EWM
V
hub
¼
V
red,50
steady wind model
H
¼
H
max,50
Wind/wave
misalignment
UE
6.2a
EWM
V
hub
¼
V
ref
turbulent wind model
Irregular sea state with H
s,50
Grid loss
U
A
6.2b
EWM
V
hub
¼
V
e,50
steady wind model
H
¼
H
red,50
Grid loss
U
A
6.3a
EWM
V
hub
¼
V
e,1
turbulent wind model
Irregular sea state with H
s,50
Extremely oblique
angle of attack
UE
6.3b
EWM
V
hub
¼
V
e,1
steady wind model
H
¼
H
red,1
Extremely oblique
angle of attack
UE
6.4
NTM
V
hub
<
Irregular sea state with H
s
(V)
F
)
0.7
V
ref
6.5
EDC
50
V
hub
¼
V
ref
H
¼
H
red,1
Formation of ice on
rotor blades and
structure
UE
6.6
Thermal actions, if applicable
U
E
6.7
EWM
V
hub
¼
V
red,50
Steady wind model
—
50-year sea ice
U
E
7. Parked after
a fault
7.1a
EWM
V
hub
¼
V
e,1
steady wind model
H
¼
H
red,0.1
UA
7.1b
EWM
V
hub
¼
V
red,1
steady wind model
H
¼
H
max,1
UA
a)
7.2
NTM
V
hub
<
0.7
V
ref
Irregular sea state with H
s
(V)
F
8. Transport,
erection,
maintenance
and repairs
8.1
EOG
1
V
hub
¼
V
T
H
¼
H
s,T
To be specified by
manufacturer
UT
8.2a
EWM
V
hub
¼
V
e,1
steady wind model
H
¼
H
red
(V)
Locked state
U
A
8.2b
EWM
V
hub
¼
V
red,1
steady wind model
H
¼
H
max
(V)
Locked state
U
A
a)
8.3
Vortex-induced
transverse vibrations
F
a)
/A
8.4
NTM
V
hub
<
Irregular sea state with H
s
(V) No grid over long
period
F/U
0.7
V
ref
8.5
NWM
V
hub
<
H
¼
H
s,T
Ship impact
U
A
V
T
a
)
Partial safety factor for the effects of fatigue:
g
F,fat
¼
1.00 (see [11] 4.3.7.2.2).
b)
If a cut-out wind speed (V
out
) has not been defined, use the reference wind speed (V
ref
).
Note: The indices 1 and 50 for the EOG and EDC wind conditions denote the 1- and 50-year return periods
respectively.
