轴系计算书.docx
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轴系计算书.docx
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轴系计算书
A.Introduction介绍
B.Engineandpropellerparameter柴油机和螺旋桨参数
C.Definitionsandassumptions定义与假设
D.Inputdata输出数据
E.Bearingreactioninfluence轴支撑反力影响
F.Jackcorrectionfactors千斤顶无轴承无距离修正负荷
G.Propeller50%immersed.螺旋桨50%浸没
G1.Max.Shearforces,deflections,slopeandbendingateachshaftsection....……轴每节最大剪切力,挠度,坡度和弯曲
G2.Optimumalignmentresults..........·······················································……
G3.Diagramofmoment&shearforceattheendengineoutputend................……
G4.Shaftbendingmomentplot................................................................……
G5.Shaftstressplot...............................................................................……
A.Introduction
ThealignmentcalculationforshaftsystemhasbeencarriedoutbyusingtheNauticus
MachineryCalculationPackagefromShaftAlignmenttoolDNVsoftware.
Thealignmentprogramusesthetransfermatrixmethodforsolvingtheequations.All
statequantitiesarerelatedtotheX-axisthatcoincideswiththeshaftcenterlineand
pointsforward.Theshaftlineismodeledaselementswithdifferentcharacteristics.The
distributionofmassiscontinuousinshaftandflanges,andconcentrated(discrete)in
theotherelementtypes.Thesystemisconsideredtohavefixedpositionsatthebearings
B.Engineandpropellerparameter
EnginetypeYMDB&W6S35MC
Nominalpower4440KW
Nominalspeed173rpm
Massofturningwheel1845kg
Propellerparameter
Propellerdiameter4180.0mm
MassofPropeller(dry)6339.4kg
intermediateshaft0315X4400
Propellershaft0360X6660.
C.Definitionsandassumptions
ReferencelineAftstern‐tubebearingistakenasbeingsupportedatonefourthofbearinglengthfromtheaftendstaticcondition.ForallotherbearingsatthemidpointBearingoffsetsPositivewhenabovethereferenceline
BearingstiffnessBearingareconsideredtobeinfinitelystiff.
BearingloadinfluenceShowthechangebearingreactionwhenonebearingismovedverticallyrelativetotheothers.
HulldeflectionsDeflectionsduetodifferentdraughtandloadconditionarenotconsidered.
ThermalexpansionThethermalexpansionoftheenginestructure一i.e.fromtheengineseatingtocenterofthemainbearingis0.14mm,whentheenginetemperatureisraisedfromcold(200C)tonormalrunningtemperature(550C)
BuoyancyeffectThebuoyancyeffectfortheshaftpartsin
waterandoilisconsidered.
WarmconditionWarm(550C)conditionatMCRspeed.
ColdconditionStaticcold(200C)condition
G2.Optimumalignmentresults
Operatingcondition1(50%)
Operatingcondition2(50%)
G3.Diagramofmoment&shearforceattheendengineoutputend
Oncoldstaticendshearforcef=4.34kn
:
AtengineoutputendshearforceF=4.34KN
MomentM=一13.70KNM
TurningwheelweightG=18.09KN
ThereforeF+G=22.43KNOA
MomentM=一6.11KNM
TurningwheetweightG=18.09KN
ThereforeF+G=26.91KN
warmstaticcondition:
engineoutputendshearforceF=8.82KN
MomentM=一6.11KNM
TurningwheelweightG=18.09KN
ThereforeF+G=26.91KN
G4.Shaftbendingmomentplot
G5.Shaftstressplot
G6.Shaftdeflectionplot
G7.Openshaft(gapandsag)anddeflectionplot
H.Propeller75%immersed
H1.Max.Shearforces,deflections,slopeandbendingateachshaftsection
Operatingcondition1(75%(cold))
TheslopeofPropellershaftatsterntubesupportingis0.297E-03rad.
Operatingcondition2(75%(warm))
TheslopeofPropellershaftatsterntubesupportingis0.301E-03rad.
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