走台,工作区域载荷fromABS-MODU_Part_3_e-Nov06
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Part 3 Hull Construction and Equipment
Chapter 1 General
Section 2 Environmental Loadings 3-1-2
14 ABS RULES FOR BUILDING AND CLASSING MOBILE OFFSHORE DRILLING UNITS . 2006 FIGURE 1
Current Velocity Profile
XVtVsVwVt + Vs + VwVt + Vs + Vw
Vt + Vs
Vt + Vs
x (+)
x (−)
(d + x)d(d − h)
(d + x)d(d − h)dhZ
1.9 Loadings due to Vortex Shedding
Consideration is to be given to the possibility of flutter of structural members due to vortex shedding.
1.11 Deck Loadings
As indicated in 1-1-7/1, a loading plan is to be prepared for each design. This plan is to show the
maximum uniform and concentrated loadings to be considered for all areas for each mode of
operation. In the preparation of this plan, the following loadings are to be considered as minimums.
Crew spaces (walkways, general traffic areas, etc.)
4510 N/m2 (460 kgf/m2, 94 lbf/ft2) or 0.64 m (2.1 ft) head
Work areas
9020 N/m2 (920 kgf/m2, 188 lbf/ft2) or 1.28 m (4.2 ft) head
Storage areas
13000 N/m2 (1325 kgf/m2, 272 lbf/ft2) or 1.84 m (6.0 ft) head
1.13 Units Resting on the Sea Bed
Units which are to rest on the sea bed are to have sufficient positive downward gravity loadings on the
support footings or mat to withstand the overturning moment of the combined environmental forces
from any direction. Realistic variable loads are to be considered. For self-elevating units, see also
3-2-3/5.11.
