A Solution to the Inherent List on Nimitz Class Aircraft Carriers

More documents

Recommendations

Info

• Ballast type density • Tank weight Degree Increment: • Weight • Percent change • A KG • A Trim 3.2 Final Cost Estimation Once <strong>the</strong> POSSE modeling analysis was complete, a final cost assessment was made based on <strong>the</strong> new results for list correction in half degree increments up <strong>to</strong> 3 degrees for <strong>the</strong> T^ and 8"" deck tanks. Because <strong>the</strong> 8'*' deck tanks now had <strong>to</strong> be stiffened, <strong>the</strong> material costs and material weights had <strong>to</strong> be determined. The production costs were assumed <strong>to</strong> be <strong>the</strong> same. This information is included in Appendix G. Also, analysis on <strong>the</strong> T^ deck revealed that compartment 2-250-2-V had <strong>to</strong> be used when trying <strong>to</strong> correct 3 degrees of list. Code 256 provided production and material costs as well as <strong>the</strong> material weights for tank prepping <strong>the</strong> Perma Ballast® installation. All cost estimations were calculated and derived as previously discussed in <strong>the</strong> preliminary cost estimation section. This time, however, 2"^* deck tanks were based on approximately 80% fillable capacity and S"" deck tanks were based on approximately 90% finable capacity. When filled <strong>to</strong> <strong>the</strong>se capacities, canning plate work was not required. Similarly, any additional weight added due <strong>to</strong> <strong>the</strong> addition of internal structures or stiffening was again tabulated and tracked. Table 6 shows <strong>the</strong> <strong>to</strong>tal cost, <strong>to</strong>tal weight addition, and change in KG for each half degree increment on both <strong>the</strong> T^ and 8'*' decks. 46
Table 6: Final Cost, Weight Addition, and Change in KG Comparison <strong>List</strong> (Degrees) 0.5 1 1.5 Ballast Density (200 lbs/ft') (200 lbs/ft^) (200 lbs/ft^) Tank Location 2nd Deck 8th Deck 2nd Deck 8th Deck 2nd Deck 8th Deck Production Cost ($) 115,046 42,372 243,240 84,744 280,062 127,116 Material Cost ($) 7,744 8,850 16,373 17,700 18,851 26,550 Perma Cost ($)** 127,900 139,825 158,950 186,400 190,675 227,125 Total Cost ($) 250,690 191,047 418,563 288,844 489,588 380,791 Material Weight (L<strong>to</strong>ns) 1.65 0.80 3.49 1.61 4.01 2.41 Perma Weight (L<strong>to</strong>ns) 124 177 262 384 403 565 Total Weight (L<strong>to</strong>ns) 125.65 177.80 265.49 385.61 407.01 567.41 A KG (ft)** +0.02 -0.02 +0.04 -0.05 +0.05 -0.08 **Perma cost estimates 5asedon $1 00,000 + $: >25/lt for 200 lbs/ft'^3 **(+) indicates increasing KG which is a negative effect **(-) indicates decreasing KG which is a positive effect <strong>List</strong> (Degrees) 2 2.5 3 Ballast Density (20011 bs/ft^) (20011 t>s/ft') (2001 bs/ft^) Tank Location 2nd Deck 8th Deck 2nd Deck 8th Deck 2nd Deck 8th Deck Production Cost ($) 411,552 148,302 427,331 211,860 478,840 233,046 Material Cost ($) 27,701 30,975 28,764 44,250 32,231 48,675 Perma Cost ($)** 222,175 295,075 253,675 341,200 288,775 392,050 Total Cost ($) 661,428 474,352 709,770 597,310 799,846 673,771 Material Weight (L<strong>to</strong>ns) 5.90 2.81 6.13 4.02 6.86 4.42 Perma Weight (L<strong>to</strong>ns) 543 867 683 1,072 839 1,298 Total Weight (L<strong>to</strong>ns) 548.90 869.81 689.13 1,076.02 845.86 1302.42 A KG (ft)** +0.07 -0.13 +0.09 -0.14 +0.11 -0.17 **Perma cost estimates jased on $1 00,000 + $: I25l\i for 20 0 lbs/ft'^3 **(+) indicates increasing KG which is a negative effect **(-) indicates decreasing KG which is a positive effect 47
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: 3.1 Final POSSE Results The minimum
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 97 and 98:
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 103 and 104:
Page 105 and 106:
Main Deck Shell FR 165 - FR 180 Tra
Page 107 and 108:
Calculations to De
Page 109 and 110:
structural Analysis for Compartment
Page 111 and 112:
Page 113 and 114:
Calculations to De
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Calculations to De
Page 121 and 122:
Stress Calculations: Stiffening k =
Page 123 and 124:
Resulting Pressure on Shell Plating
Page 125 and 126:
Calculations to De
Page 127 and 128:
Stress Calculations for 227 I<stron
Page 129 and 130:
Resulting Pressure on Inner Longitu
Page 131 and 132:
Calculations to De
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Stress Calculations k = coefficient
Page 139 and 140:
Resulting Pressure on Transverse Bu
Page 141 and 142:
Calculations to De
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
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?