A Solution to the Inherent List on Nimitz Class Aircraft Carriers

More documents

Recommendations

Info

Stress Calculations: k = coefficient that depends on <strong>the</strong> plate edge conditions, aspect ratio (AR) of <strong>the</strong> panel, and position of point being considered o := k-P- — p = pressure based on limiting ballast add for shell plating calculations b = panel width a = panel length t = plate thickness •Simply.supported -^ •'^- K;lamped •= -^ ^ ^''''"^^ ^""^ "1°^' conservative a := 114Jn b := 15-in based on 15 in separation between stiffeners P = 16.81— t := .375n . 2 m ^max allowable" 40,000— JAW with <strong>the</strong> General Specs (Section 100) . 2 m "'simply.supported • "Simply.supported '^i bV *^siniply_supported - 20172 . 2 m ''clamped • "^clamped'" I I lb "clamped = 13448— . 2 m Maximum Allowable Stress for HTS is 40,000 psi. By adding stiffeners at 15 in, this stress falls below that of simply supported and that of clamped. Simply supported and clamped structural cases are idealizations of structural member support illustrating zero stiffness and infinite stiffness, nei<strong>the</strong>r of which exists in any real-world structural system. On board ship, structural systems can be conveniently approximated by one or <strong>the</strong> o<strong>the</strong>r case, but in fact have stiffness between one or <strong>the</strong> o<strong>the</strong>r. Navy structural analysis is based off clamped ends, <strong>the</strong>refore <strong>the</strong> stress falls well below maximum allowable. "clamped*^*^ "max_allowabl( 142
structural Analysis for Compartment 8-225-6-V: Transverse Bulkhead Frame 230 Perma Ballast® Data lb Pp, erma := 200- ft % Perma fill :=.9f Conversion Fac<strong>to</strong>rs I<strong>to</strong>n :== 224ab lb Psw ~ 64.4— ft Compartment 8-225-6-V Volume := 2814Ft^ Wperma-=2271<strong>to</strong>n Density of Perma Ballast® Based on 95% Fillable Volume Density of Seawater Volume of Compartment Weight of Permanent Ballast Inner Longitudinal Bulkhead (Shaft Alley Bulkhead #4) 14.024# (.343' 20' — Outer Longitudinal Bulkhead / (Longitudinal Bulkhead #3) ^ 17.85# (.437') FR 230 Transverse Bulkhead 12.75# (.3125") Ship Motion Fac<strong>to</strong>rs: V:=L2f Vertical A := 0.7f Athwartship F := 0.4 Fore/Aft Loading on Transverse Bulkhead Plating: Shell Plating 30.6# (.75") FR 225 Transverse Bulkhead 15.3#(.375l Stnnger #14 7 '^stringer #11 Wpgjjjjg = 5.085X 10^ lb Weight of Perma Ballast® Fy := VWp^^g PA •= ^•'^Perma Fp := FWpgrma ^N' Fv = 6.356x 10 lb F^ =3.814x 10^ lb Fp=2.034x 10^ lb Fjsj = 2.034X 10 lb Vertical Load (Downward) Athwartship Load (Port) Fore/Aft Load Normal Force 143
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 109 and 110: 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 141: Calculations to De
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

Create successful ePaper yourself

Delete template?

Save as template?