Environmental Engineering Reference
In-Depth Information
Table 4.5 Wind condition designations in Table 4.4
DLC
Design load case
GL Guideline [11], section
NWP
Normal wind profile model
4.2.2.3.2
NTM
Normal turbulence model
4.2.2.3.3
EWM
Extreme wind speed model
4.2.2.4.1
EOG
Extreme operating gust
4.2.2.4.2
EDC
Extreme direction change
4.2.2.4.3
ECG
Extreme coherent gust
4.2.2.4.4
ECD
Extreme coherent gust with
change of wind direction
4.2.2.4.5
EWS
Extreme wind shear
4.2.2.4.6
The similarity between the designations in [9,11] is obvious.
Table 4.6 Wave height designations in Table 4.4
No.
Symbol
Description
GL Guideline
[11], section
1
H
s
(V)
Significant wave height (H
s
) corresponding to
10-min average of wind speed at hub height
(V
hub
)
4.3.3.2 (6), (7)
2
H
red
(V) Reduced wave height corresponding to V
hub
4.3.2.3.1 & 4.3.3.2
3
H
max
Maximum wave height corresponding to V
hub
4.3.2.3.1 & 4.3.3.2
4
H
s,1
Significant wave height for 1-year return period 4.2.3.1.4
4
H
s,50
Significant wave height for 50-year return
period
4.2.3.1.4
2
H
red,N
Reduced wave height for N-year return period
4.3.2.3.1, 4.2.3.1.4
3
H
max,1
Maximum wave height for 1-year return period
4.3.2.3.1
3
H
max,50
Significant wave height for 50-year return
period
4.3.2.3.1, 4.2.3.1.4
Height of breaking wave
a)
5
H
B
4.2.3.1.5
a)
See Section 2.5.9.
