design considerations for aluminum hull structures - Ship Structure ...

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-62-(c)(d)(e)(f)T~e exterior side of the machinery casing, where this surface isnormally exposed bare metal as in the crew sto~es and servicea~eas.Bulkheads separating stores and se~vice spacesexposed bare metal.Galley and pantry bulkheads require additionalthat normally fitted for thermal conditions.Other minor cases.which are normallyprotection overWith regard to the lower suxface of the decks, it is apparent that witha maximum allowable aluminum temperature of 400 degrees F, and a requiredtest of 1700 degrees F, an insulated construction is mandatory.For the upper surface of aluminum decks in the presence of a fire withinquarters, equivalent to the Standard Time Curve, the following observationsare noted: The “Nantasketfltests, Reference (s4) indicated that the deckcovering restricted the downward propagation of flame, provided the coveringwas of an incombustible nature. This was largely due to the lack of oxygenat floor level, the products of combustion at this level, and the rising ofheated air. This point was also illustrated by the Stateroom Fire TestReport, Reference (58). In this case with bare aluminum deck, the aluminumreached a temperature of 400 degrees F within 18 to 2S minutes. The maximumtemperature reached was only approximately 675 degrees F at 3S minutes,afber which the temperature declined. The British Test, “Fire Protectionin Passenger Ships~l,Reference (~~), with a 3/16 inch sand filled latexunderlay and I/8 inch thermoplastic resin bonded tiles, resulted in a maximumaluminum temperature of 425 degrees and 2g0 degrees on two isolatedthermocouples at the end of SO minutes.From the above, it can be assumed that a lesser degree of protectioncanbepermitted within the quarters to protect the upper surface of the decks thanis required on the underside.Therefore, the decks requiring additional probectiioncan be groupedunder the following categories:(a)(b)(c)(d)(e)Above the ~ormal stateroom ceilings, insulation must be added.ksulation protection must be added in those spaces exposed tothe weather, in addition to that normally fitted with thermalinsulation.insulation must be fitted to the overhead of nonair-conditionedspaces when located under air-conditioned spaces in addition tothe thermal insulation normally provided.Insulation is required in the overhead of stores and servicespaces located under similar spaces.All topside surfaces must be protected.The required protection resulting from the application of thesecriteria to the MV CHALLENGER of steel and aluminum construction aresmarized in Tables 11 and 12. These tables indicate that the additionalinsulation required for the aluminum deckhouse would be about 110,000pounds if tie present U. S. Coast Guard requirements are fully satisfied.
TABLE 11 Aluminum Bulk Carrier - Summarv of Joiner Bulkheads.Linin! ; and Insulation in Living, blorkin~ and Stores SDaces “THISSPACEDK.HSESIDEDK FiSE SIDEPASSAGEWAYs/RMSTAIRTOJERA.C.ROOMMACHYMACHYMACHY!4ACWCASINGCASINGCASINGADJACENTTOWEATHERWEATHERS/RF4Y-ETGs/RMPASSAGETOILETWEATHERPASSAGE,S/PJ4S, ETC.STAIR TOWER,TOILET, PASSAGEINSUL .2“/1 “-T#2“/! “-1#NONENONENONE2;(;;-1#STL2“/1 “-3#2 “/1“ -3#2:fR;-3#STLSTEELSHIPSHEATHG7/8” MAR 36#SHT.MET.7/8” MAR 36#7/8” MAR 36#7/8” MAR 36#SINGLEFACEDSHT.SHT,MET,MET.SHT. MET.7/8” MAR 36#SHT.MET.LB./SQ.FT.4.312.144.004.004.002.142.606.602.60! NSUL ,2“/1 “-1#2“/1’’-6#NONENONENONE2“/1’’-l#—21!/4fn_6#2“/4n-6#2“/4’’-6#ALUM.SHIPSHEATHG7/8” MAR 36#SHT,MET.7/8” MAR 36#7/8” MAR 36#7/8” MAR 36#00U13LEFACEOSHT, MET.7/8” MAR 36#SHT.MET.SHT. MET.7/8” MAR 36#SHT, MET.7/8” MAR 36#LB./SQ.FT.4.313.254.004,008.006.144.608.608,60SQ.FT.7,6002555,0405,9251,2651361611,1302,370ADDLWGTALUM-LBSNONE283NONENONE5,0605443222,26014,220A.C. MACHY RMA.C, MACHYROO-1STORERO@lA.G. MACHYROOM!4ACHYCASINGSTORES~ESSRMS5TORESWEATHERFANSTOREROOMROOM14AGli’tCASINGGALLEYGALLEYGALLEYREFRIG.STORES2“/1’’-l#2“\l’’-l#2“/1’’-T#BARESTEEL2“/1 “-1#2“/? “-3#2“/1“-1#2“/1’’-3#4“-1#BARES TL4“-T#12’’-l#BARESTLSHT.StiT.WT.SHT.SHT.SHT.SHT.SWT.MET.MET.MET.i.IET.MET.MET.MET.—MET,SHT. MET.7/8” MAR 36#REEFERITE2.144.300.04.704.702.296.299.202 “/1 “ -6#2“/1 “-6#2“/1’’-6#2“/1 “-6#2“/1 “-6#2“/T’’-l#2“/4’’-6#2“/7 “-T#2’r/4’’-6#4“ -6#2“/1 “-6#4“-6#12’’-l#2“/1 “-6#SHT.SHT,SHT.SHT.SHT.SHT.SHT.MET,MET.MET.MET.MET.MET.MET.SHT. MET.SFIT. MET.SHT.SHT.MET.MET.SHT. MET.7/8” MAR 36#REEFERITESHT. MET.3.256.506.506.706.707.207.9012.501611327656121613231538001782904,9731,2243221>5832602,640&LdPANTRYPANTRY2ASSAGE.AUNDRYk STORESLOUNGEWEATHEREMER.PASSAGEGEN.2“/1 “-1#?l~/1 11-1#21t/lllq#711/~ llq#—SHT. MET.7/8” MAR 36#SH7.MET,SHT, MET,7/8” MAR 36#SIIT.4.312.144.312“/1’’-6#2“/1 “-6#2“/1 “-6#SHT. MET.7/0” MAR 36#5HT.3HT.MET.MET.7/8” MAR 36#MET. 2.142“/1 “-6# 5HT. MET.7/8” MAR 36#1-TOTAL - JOINER BULKHEAOS Ah INSULATION7.253.257.257.252722,1301871,25030,8288162,365?5596,45044>349
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CONTENTSI.. II.III.Iv.v.VI ●VII.I
Page 9 and 10:
LIST OF FIGURES(Cent’d)FIGURE NO.
Page 11 and 12:
I. INTRODUCTIONThis report summariz
Page 13:
art in fabricating and maintaining
Page 16 and 17:
MONTEROSSO GRANA /17VALGRANA / CARA
Page 18 and 19:
-8-Numerous references have been re
Page 20 and 21:
.10.TABLE 2. Mechanical Properties
Page 22 and 23: TABLE 2 Mechanical Properties of Al
Page 24 and 25: TABLE 3 Mechanical Property Limits
Page 26 and 27: -16-l?igures5, 6, 7 ati 8 present f
Page 28 and 29: -18-ti-’”’-”-””””-L
Page 30 and 31: -20-60 .r---.— ..,.— -——,L-
Page 32 and 33: .22-each stress level, rate of load
Page 34 and 35: -24-!Z456-H321 = 0.485083-H321 = 0.
Page 36 and 37: -26-(c)Members with partial or cont
Page 38 and 39: -28-AllOyS 5083 and 54.56(~ content
Page 40 and 41: -30-The previous paragraphs have de
Page 42 and 43: -32-The problem of cargo hold abras
Page 44 and 45: -34-The question of residual stress
Page 46 and 47: .36-Each alloy was given a relative
Page 48 and 49: -38-GENERAL OBSERVATIONSFYior to a
Page 50 and 51: -40-The question of comparative imp
Page 52 and 53: -42-(d)(e)Poor quality welds due to
Page 54 and 55: -44-The ABS criteria noted above we
Page 56 and 57: -46-DNV would consider fatigue in e
Page 58 and 59: -48-is less, for the exposed side s
Page 60 and 61: Equation (2):-50-Hu1l SMa~um = Hull
Page 62 and 63: -52-Another aspect of vibrations wh
Page 64 and 65: -54-000000000Bottom Shell PlateSide
Page 66 and 67: -56-at the deck and keel. This stre
Page 68 and 69: -58-AT is the change inUT= Thermal
Page 70 and 71: -60-SUl@!ARYAll parties contacted f
Page 74 and 75: TABLE 12 Aluminum Bulk Carrier - Su
Page 76 and 77: .66-INSUT.ATION AND SHEATHINGShell8
Page 78 and 79: -68-(b)(c)(d)(e)(f)(g)(h)(i)(j)At l
Page 80 and 81: -70-IIF.INSTALLATION OF SYSTEMS AND
Page 82 and 83: Rudder Assembly -carrier should be
Page 84 and 85: -74-(b)MechanicalTensile Strength 6
Page 86 and 87: -76-(e)The steel piping must be of
Page 88 and 89: -78-Other Piping Systems and Valves
Page 90 and 91: -80-struetion for the aluminum hull
Page 92 and 93: -82-Large heavy type machine~ must
Page 94 and 95: suffers attack in an alkaline envir
Page 96 and 97: -86-REPAIRSObtaining proper repairs
Page 98 and 99: -88-The design of the midship s~cti
Page 100 and 101: -90-assuming the increase is applic
Page 102 and 103: LIGHT SHIP WEIGHT ESTIMATE-92-In or
Page 104 and 105: -94-TABLE 20 Aluminum Bulk Carrier
Page 106 and 107: TABLE 22 Trim and StabilityFull Loa
Page 108 and 109: -98-TABLE 24 Price of Steel Bulk Ca
Page 110 and 111: GaseNumber. . . -.,- .TABLE 27 Comp
Page 112 and 113: -1o2-TABLE 28CarriersComparison of
Page 114 and 115: 12 ---n..T.[T7%l,=LEGS IU ORF=ErY
Page 116 and 117: -106-such as iron ore, on two of th
Page 118 and 119: -108-7)is,zg~ gg~5e mzz~E’4E!~K2j
Page 120 and 121: -11o-(a)(b)(c)(d)Inerting system fo
Page 122 and 123:
-112-fatigue, particularly in the p
Page 124 and 125:
-114-2k* Installation of Systems an
Page 126 and 127:
-116-LIST OF REFERENCES(7)Fatigue P
Page 128 and 129:
-11.8-LLST OF REFERENCES(Cent’d)(
Page 130 and 131:
-120-ADDITIONAL SOURCES OF INFORMAT
Page 132 and 133:
-122-redistribution of the still wa
Page 134 and 135:
-124-APPENDIX BEXCERPTS FROMRULES A
Page 136 and 137:
-126-92.07-10(d)(~) Interior stairs
Page 138 and 139:
-128-~gE1+0102030- .. ..—405060
Page 140 and 141:
ectintyclassification4KEYWORDSROLEL
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SHIP STRUCTURE COMMITTEE PUBLICATIO
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