A Solution to the Inherent List on Nimitz Class Aircraft Carriers

More documents

Recommendations

Info

Design of Plating for Surface Ships, lAW General Specs (Section 100) b:=41in a := 24an AR := - AR =0.171 a 'actual :=-^Sin Thickness of Plate, HTS H = 56ft Head of Water K := 1 For AR = 0.171, lAW with Table I of <strong>the</strong> General Specs (Section 100) C := 400ft' For HTS, No Se, lAW with Table I of <strong>the</strong> General Specs (Section 100)t 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 t KVH H = Head of salt water (feet) 'min • K-VHb C t„i„ = 0.767in The minimum thickness calculated for this section of plate <strong>to</strong> meet Navy Structural Standards with no set is .767 in. The actual plate thickness is .75 in. Therefore, <strong>the</strong> 8th deck shell plating must ei<strong>the</strong>r be stiffened or have less ballast added. t_min »t actual 124
Calculations <strong>to</strong> Determine Strength Corrections:! t ■ -.75in Thickness of Plate, HTS H = 56ft Head of Water (With new head of water calculated using maximum allowable ballast addition) K := 1 Assume AR remains less than .5 C := 400ft'^ For HTS, No Set 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 b C ■ _ < K = coefficient that depends on <strong>the</strong> aspect ratio (AR) of <strong>the</strong> panel K-y/H H = Head of salt water (feet) "limit • ^min C KH blimit = 40-08911, 40.089 in is <strong>the</strong> maximum distance that longitudinal stiffeners can be located apart and have no deformation occur <strong>to</strong> <strong>the</strong> .75 in plating. The shell plating has 2 longitudinal stiffeners or stringers located apporoximately 41 in apart. Therefore, stiffening of <strong>the</strong> existing shell plating will be required for 251 I<strong>to</strong>ns of ballast. 125
Page 1 and 2:
A Solution <strong
Page 3 and 4:
A Solution <strong
Page 5 and 6:
Table of Contents Abstract 3 Acknow
Page 7 and 8:
1.0 Introduction 1.1 Motivation Air
Page 9 and 10:
class. Changes to
Page 11 and 12:
classified into fo
Page 13 and 14:
o Control the KG g
Page 15 and 16:
the intact stabili
Page 17 and 18:
for ships propulsion, respectively.
Page 19 and 20:
combined with the
Page 21 and 22:
1.3.7 Ballast Addition 1.3.7.1 Wate
Page 23 and 24:
2% entrained air (by volume) in <st
Page 25 and 26:
Tank name Tank volume Ballast type
Page 27 and 28:
was successfully performed and <str
Page 29 and 30:
of each tank's location was added,
Page 31 and 32:
2.3 Preliminary Decision-Making Cos
Page 33 and 34:
All further costin
Page 35 and 36:
2.4 Structural Analysis One tank on
Page 37 and 38:
this pressure. This resulted in a r
Page 39 and 40:
2.4.1 Structural Modifications 2.4.
Page 41 and 42:
Main Deck Shell FR 165 - FR 180 Tra
Page 43 and 44:
2.4.1.3 Modifications to</s
Page 45 and 46:
3.1 Final POSSE Results The minimum
Page 47 and 48:
Table 6: Final Cost, Weight Additio
Page 49 and 50:
Corrosion coupons are placed in all
Page 51 and 52:
5.0 Recommendations 1. As can be se
Page 53 and 54:
References [I] Design Data Sheet 07
Page 55 and 56:
O CO ■*. CM d CVI d CVI d CO d CO
Page 57 and 58:
1
Page 59 and 60:
■ • s*; eo 1 CM ■
Page 61 and 62:
■ E 1- < O Y < ^^ i SS! m c in in
Page 63 and 64:
ON OC) 00 00 o o o ^ < ^ < o 00 o I
Page 65 and 66:
«n < 1-H ON H ^ 0\ 1—1 i-( o ©
Page 67 and 68:
in -^J r-- OS H 00 ■* ri o F^^ ^
Page 69 and 70:
=» * o o o o o o o § § < S , , s
Page 71 and 72:
i V) H % * l-H
Page 73 and 74: % H o o o © s * < © © o i^ © H
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
Page 79 and 80: 1^ r-( 1-H M n
Page 81 and 82: Vi ^■ ««■ -^ ^^ * * o o o o o
Page 83 and 84: 4t S C/l r/i 00 * s M * o * < ly) C
Page 85 and 86: ^5- Q © © © © © © o o © ©
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 121 and 122: Stress Calculations: Stiffening k =
Page 123: 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
show all

A Solution to the Inherent List on Nimitz Class Aircraft Carriers

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?