edsweepsfrom500to2500rpmatco
sta
ttorqueNocorrelatio
wasfou
dbetwee
dy
amictra
smissio
errora
d
oiseStaticloadedtra
smissio
errorseemstobecorrelatedwiththeabilityofthegearpairtoexcitevibratio
i
thegearboxdy
amicsystem
Keywordsgeargearbox
oisevibratio
tra
smissio
errorbeari
g
preload
ACKNOWLEDGEMENTS
ThisworkwascarriedoutatVolvoCo
structio
Equipme
ti
Eskilstu
aa
dattheDepartme
tofMachi
eDesig
attheRoyalI
stituteofTech
ology
fKTHi
StockholmTheworkwasi
itiatedbyProfessorJackSamuelsso
Volvoa
dKTHProfessorSre
A
dersso
KTHa
dDrLarsBrtheVolvoThefi
a
cialsupportoftheSwedishFou
datio
forStrategicResearcha
dtheSwedishAge
cyforI
ovatio
SystemsVINNOVAisgratefullyack
owledgedVolvoCo
structio
Equipme
tisack
owledgedforgivi
gmetheopportu
itytodevotetimetothisworkProfessorSre
A
dersso
isgratefullyack
owledgedforexcelle
tguida
cea
de
courageme
tIalsowishtoexpressmyappreciatio
tomycolleaguesattheDepartme
tofMachi
eDesig
a
despeciallytoDrUlfSellgre
forperformi
gsimulatio
sa
dco
tributi
gtothewriti
gofPaperDa
dDrStefa
Bjrklu
dforperformi
gsurfacefi
ishmeasureme
tsTheco
tributio
stoPaperCbyDrMikaelPrssi
e
arehighlyappreciatedAllco
tributio
stothisworkbycolleaguesatVolvoaregratefullyappreciated
1
INTRODUCTION
11Backgrou
d
Noiseisi
creasi
glyco
sidereda
e
viro
me
talissueThisbeliefisreflectedi
dema
dsforlower
oiselevelsi
ma
yareasofsocietyi
cludi
gtheworki
ge
viro
me
tEmployeesspe
dalotoftimei
thise
viro
me
ta
d
oiseca
lead
oto
lytoheari
gimpairme
tbutalsotodecreasedabilitytoco
ce
trateresulti
gi
decreasedproductivitya
da
i
creasedriskofaccide
tsQualitytoohasbecomei
creasi
glyimporta
tThequalityofaproductca
bedefi
edasitsabilitytofulfillcustomers’dema
dsThesedema
dsofte
cha
geovertimea
dthebestcompetitorsi
themarketwillsetthesta
dardNoiseco
cer
sarealsoexpressedi
relatio
toco
structio
machi
erysuchaswheelloadersa
darticulatedhaulersThegearboxissometimesthedomi
a
tsourceof
oisei
thesemachi
esEve
ifthegear
oiseis
ottheloudestsourceitspurehighfreque
cyto
eiseasilydisti
guishedfromother
oisesourcesa
disofte
perceivedasu
pleasa
t
fThe
oisecreatesa
impressio
ofpoorqualityI
order
ottobeheardgear
oisemustbeatleast15dBlowertha
other
oisesourcessuchase
gi
e
oise
12Gear
oise
Thisdissertatio
dealswiththeki
dofgearbox
oisethatisge
eratedbygearsu
derloadThis
oiseisofte
referredtoas“gearwhi
e”a
dco
sistsmai
lyofpureto
esathighfreque
ciescorrespo
di
gtothegearmeshfreque
cya
dmultiplesthereofwhicharek
ow
asharmo
icsAto
ewiththesamefreque
cyasthegearmeshfr