Integrating Seakeeping Analysis into the Design of Floating Systems
Figure 4: Set-up and Form Parameters for a Semi-submersible Hull with Double Symmetry
Exploded 3D view
Column z Column Fillets Main pontoon section Central pontoon section
Apm
x y Fillets
Exploded front view
Δyc
Dc
Pontoon
Bpm
Intermediate pontoon section
Apc
Table 1: Explanation of Free Variables Used in Optimisation Example
#
Symbol
1Vc/Vp
2Apm/Apc
3mpayload 4Psep
5Bpm/Hpm 6Bpc/Hpc 7∆zpc 8∆yc
Minimum
0.74 0.74
2,000t 70.0m 1.75 1.75
-5.0m 0.0m
Maximum
0.86 1.26
10,000t 90.0m 2.0 2.0
5.0m 6.0m
Explanation
Ratio of column to pontoon volume
Ratio of cross-section area of main and central pontoon section Payload mass (additional mass on deck) Pontoon centre-line separation
Ratio of height and beam of main pontoon section Ratio of height and beam of central pontoon section
Vertical shift of central pontoon section centre-line (positive upward) Transverse shift of column centre-line at waterline (positive inward)
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Hpc
Δzpc
Tp
Hpm
Bpc
Lpm
Lpc
Symmetry line
Symmetry line
Psep
2
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