Download Usfos getting started

USFOS GETTING STARTED
9-5
Figure 9.2-2 Module Support Frame
9.2.2
Loads
9.2.2.1 Environmental conditions
Representative environmental conditions are given in Table 9.2-1 to Table 9.2-4 Loading
directions (platform directions) are defined in Figure 9.2-3.
Table 9.2-1Wave (100 year return period)
Direction
Wave height
(m)
Wave period
(s)
N
NW
W
SW
S
SE
E
NE
30.0
31.0
27.0
28.5
30.5
24.0
10.0
13.5
16.5
17.0
16.0
15.5
16.0
14.5
10.0
12.5
Table 9.2-2Current (10 year return period)
Direction
N
NW
W
SW
S
SE
E
NE
Mean water surface
(m/s)
1.05
1.15
1.10
1.05
1.05
1.10
1.05
1.05
Elevation -50m
(m/s)
.80
.85
.85
.80
.80
.85
.80
.80
Mudline
(m/s)
.55
.60
.60
.55
.55
.60
.55
.55
9.2.2.2 Environmental loads
Wave loads are calculated using Stokes 5th order theory. Wave and current loads are represented
as distributed (line) loads.
Module loads and wind loads are applied as concentrated forces/moments on the deck nodes.
Wave and current loads are calculated by the SESAM'80 program WAJAC. Environmental loads
are determined for 8 platform directions. Loads are calculated for 100-year wave, 100-year wind
and 10-year current, acting simultaneously.
MARINTEK 2001