A Solution to the Inherent List on Nimitz Class Aircraft Carriers

Design of Plating for Surface Ships, lAW General Specs (Section 100)
The transverse bulkhead is trapezoidal in shape with 3 vertical stiffeners at Frames 225 and 230 respectively. The transverse
bulkhead is evenly divided in<strong>to</strong> 4 rectangular panels so that a cylindrical plate bending analysis can be performed
on each panel.
base := 30in Dimensions of small triangle
ht=26.341in ht := sin(p)-base
b := 3{)in a^ := 114in AR^ := — AR^ = 0.263
^A
aB:=114in-ht ag = 107.415iii ARg := — ARg = 0.279
aQ-a^-ht ac = 100.82CHn ARp :=— ARp = 0.298
^D '•'= ^C ~^^ ^D = 94.244in AR^ := — AR^ =0.318
^D
^actual -^ •^^^" Thickness of Plate, HTS
H = 37.587ft Head of Water
K := 1 For AR < 0.5, lAW with Table I of <strong>the</strong> General Specs (Section 100)
C := 400ft' For HTS, No Set, I AW with Table I of <strong>the</strong> General Specs (Section 100)
b
— /Hb
Vin = 0.46in
The minimum thickness calculated for this section of plate <strong>to</strong> meet Navy Structural Standards with no set is .46 in. The actual
plate thickness is .375 in. Therefore, <strong>the</strong> 8th deck transverse plating at Frame 225 must be stiffened.
t_min »t actual
140