A Solution to the Inherent List on Nimitz Class Aircraft Carriers

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Resulting Pressure on Deck Plating: Compartment Dimensions: L := 20ft W := 4ft Area := LW Area = 80ft^ P:=^ P.ZnxlOî^ P = 15.06^ Area ^2 .2 It m ^^95% '-"^ ^"Perma.fiir^ ^95% = ^Ô^x lo'^— Based on 95% Fillable Volume m ^95% H := H = 32.011ft Equivalent Head Psw The actual head for flooding of <strong>the</strong> 4th deck <strong>to</strong> <strong>the</strong> 6" above <strong>the</strong> 2nd deck (DC Deck) will result in a head of 27.7'. This value is below <strong>the</strong> head calculated above of 32'. As a result, <strong>the</strong> deck plating must be stiffened. 32 ft > 27.7 ft 116
Design of Plating for Surface Ships, lAW General Specs (Section 100) b := 48in a := 48in AR:=^ AR =1 âctual H := 27.7ft K := .78 .5 C := 35Qft - .5Qiii Thickness of Plate, OS Maximum Head of Water for 4th Deck (which really implies permanent set and may still not be conservative enough) For AR = 1, lAW with Table I of <strong>the</strong> General Specs (Section 100) For OS, No Set, lAW with Table I of <strong>the</strong> General Specs (Section 100) b — < K-VH b = short dimension of <strong>the</strong> panel (inches) t = thickness of <strong>the</strong> plate (inches) C = Coefficient that is a function of <strong>the</strong> plating material and <strong>the</strong> location of <strong>the</strong> plating on <strong>the</strong> ship K = coefficient that depends on <strong>the</strong> aspect ratio (AR) of <strong>the</strong> panel H = Head of salt water (feet) min" K-VHb tmin = 0-563in The minimum thickness calculated for this section of plate <strong>to</strong> meet Navy Structural Standards with no set is .563 in. The actual plate thickness is .5 in. Therefore, <strong>the</strong> 4th deck shell plating must ei<strong>the</strong>r be stiffened or have less ballast added. t_min »t_actual 117
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A Solution <strong
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A Solution <strong
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Table of Contents Abstract 3 Acknow
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1.0 Introduction 1.1 Motivation Air
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class. Changes to
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classified into fo
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o Control the KG g
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the intact stabili
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for ships propulsion, respectively.
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combined with the
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1.3.7 Ballast Addition 1.3.7.1 Wate
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2% entrained air (by volume) in <st
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Tank name Tank volume Ballast type
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was successfully performed and <str
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of each tank's location was added,
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2.3 Preliminary Decision-Making Cos
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All further costin
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2.4 Structural Analysis One tank on
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this pressure. This resulted in a r
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2.4.1 Structural Modifications 2.4.
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Main Deck Shell FR 165 - FR 180 Tra
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2.4.1.3 Modifications to</s
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3.1 Final POSSE Results The minimum
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Table 6: Final Cost, Weight Additio
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Corrosion coupons are placed in all
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5.0 Recommendations 1. As can be se
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References [I] Design Data Sheet 07
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O CO ■*. CM d CVI d CVI d CO d CO
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1
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■ • s*; eo 1 CM ■
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Page 75 and 76: * * H o o o o o o o o o e o o O o o
Page 77 and 78: M t» c« * ft ft H ft 00 O 00 r- O
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Page 87 and 88: "~" ~ 00 s ^ SS o s ■g Q ■* ja
Page 89 and 90: structural Analysis for Compartment
Page 91 and 92: Resulting Pressure on Sponson Plati
Page 93 and 94: Calculations to De
Page 95 and 96: Stress Calculations: k = coefficien
Page 99 and 100: FR 165 - FR 180 Transverse Bulkhead
Page 101 and 102: Design of Plating for Surface Ships
Page 105 and 106: Main Deck Shell FR 165 - FR 180 Tra
Page 115: structural Analysis for Compartment
Page 121 and 122: Stress Calculations: Stiffening k =
Page 123 and 124: Resulting Pressure on Shell Plating
Page 127 and 128: Stress Calculations for 227 I<stron
Page 129 and 130: Resulting Pressure on Inner Longitu
Page 137 and 138: Stress Calculations k = coefficient
Page 139 and 140: Resulting Pressure on Transverse Bu
Page 149 and 150: __ — __ — """ " *c; 1— ai S s
Page 151 and 152: o ON H 00 ^ ^ o > o -o B u H r^ 00
Page 153 and 154: MATERIAL WORK SHEET PERMA BALLAST®
Page 155 and 156: *• en * 5fc M S 00 00 * yj c« 1/
Page 157 and 158: CO 5t CO 00 en St 0\ CO 5t o © St
Page 159: * CO * * vT 00 * in r4~ vT * cr C/l
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A Solution to the Inherent List on Nimitz Class Aircraft Carriers

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