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ANALYSIS+OF+THERMAL-ELASTIC+STRESS+OF+WHEEL-RAIL+IN+ROLLING-SLIDING+CONTACT

CHINESEJOURNALOFMECHANICALENGINEERING

?21?

mechanicala芏1d

thc埘al

stresses,alldme1argemechaIlicals仃ess

onh,exists枷ng

contact,

sotheMisesstresschangesmore

auicklvwithmetimethantlletemperatllre.Cornpared也eresults

oftwocases

wheret11eth锄al

10adistakenintoconsideration

and

not,even

ifthe

materialleavescontactpatch,themechanicals缸弓ssdisappears,merelativelVsmaUs缸℃ssstillexists,namely

themal

s仃ess.In

addition,丘omFigs.3and4,itisfloundmatthe

increasingrates

of

the衔ctionteInperature锄dthetllemal

s仃ess

of

mematerialente—n2mecon协ctareaare舢ch

hi曲ertllanthoseoftllematerialleavingthecontactpatch.TheresultsoftherailaresiIllilartothoseoftllewheel,butc蛐’tgetintoasteady

cVcle

state

likethewhecl,and

soare

notshownagainhere.

525

Longitudinal

coordinate—mm

r小Wheel

Longitudinal

coordinate刊mm

fblRail

Fig.5

Misesstressdismbution

nearwheeI—rail

cOntactpatchat1.72

I孟

墨芑

Longitudinal

coordinate—mm

(a)wheel

Longitudinalcoordinate

J/mm

(b)Rail

Fig.6

Localstressdistribution

ofwhee胁i1

at1.72

witllout也a眦al

s仃ess

Fig.7皿e咖al

fatiguedamage

ontllewheel

su血ce

Fig.5showsthelocal

Mises

s仃ess

dis仃jbutionofthewheel/

rail

near

thecontact

patchat1.72s.Fig.6showsMisesstress

2.2

Effectofmlling

speed

on御ctiontempe豫ture

distributionoft11e

s锄e

wheel/rail10cationwheremethemal

and

thermaIstress

s打ess

isneglected

at

1,72

s.

Contrasting

Fig-5toFig.6,it’sfoundthatthecontollrlines

aroundthecomactpatchinFig.5aremorecrowdedmanFig.6.Inanotherword,inmeregionaroundthecoll忉默patch,the酉a-dientsofthestressesands仃ainswithconsideringme倒ctiontemperatIlreeffbctareInuchhi曲ermant110sewi廿lout.The衔c—

tionheatcan擘,eatlyafrectthetemperanlreandstressdistribution

inabout2

mmdepm.Fordeeperarea,the衔ctionheathasavery

smallinnuenceontlles仃essdistribution、]l,hichismainlVcausedby也emechanical10ad.It’sshowninFig.5matevenmou量血thesllrfacematerial1eavestllecontactzone.themennals仃essisstinconsiderableldlletonotsumcientc001in2.

Accordin2totheresultsshowninFigs.3~6,it’sconcludedmatmenuctIlantmernlalloadimDactsmewheelsllrfaceatldsub-surface.ThethennalstressandtemDeratllrerisedueto缸ctionisconsiderableandcan’tbeneglectedonthewheelsurfhceandsubsurface.Thissituationeasilycausestlleme彻alf乱i毋ledam-

ageinthewheelsurface,asshownin

Fig.7.

In

ordcrt0stIldythee虹bctsoftllerollingspeedonme衔c—

tiontenlperatllre髓dthen】1als仃ess,threecaseswitllmer01lingspeedsof25m/s,50m/sand1OOm/sareanalyzed,respectively.Forthecomparabilityofdifferemcase,t11eslidingspeedisan

assumedtobe1In/sinthethreecases.namelv’theheatsourcearemesarIleinthethreecases.Therefore,t11ecreepagesofmethreecasesare,rcspectively'4%,2%and1%forthegivenmreer01ling

speeds.Thevalues

ofotherparameters

listedin1lIble.Fig.8

showsthetemDeral}urehistoriesofmesame、^血eel叫f-acenodeat

threerolling

speeds.ThecoITespondingMisess仃esshistoriesof

mewheels11rfacenodeforthemreerollingspeedsareshownin

F运9.

FromFigs.8a11d9,itcanbefollndthatmehi曲errolling

speed1eadstothelower缸ctiontemperatLIreriseandmesmallersn.ess.AndtherateoftemDeraturechallgewjmmespeedincrease

is10werthanthat

ofMisess订ess.Thatisbecausethesu—hcema—

terialsoft11ewheelandrailpassmrou曲tllecomactpatchforashortertimeatahigherspeed.Therefore,atthes锄esliding

9OO112455

555一一一一一

一一仨粤

CHINESEJOURNAL0FMECHANICALENGINEERING?23?

Fig.11F1attingonmewheelsurfaceduet0br出e

3CoNCLUSIoNS

Usingtwo.dimensionalfiniteelementrnemod,an、】mericalmethodisputfon)lrardtoanalyzetllecouplingthernlal一mechanical

s仃essofwheel/railinrolling—slidingcontact.Inmenumericalanalvsis,forsimplicity,thecontactmechanicsmodelofthewheel/railisdirectlygjven,namely,Carter’s“vo—dimensionalroUingcontactmodelisusedtodetenninethepressureandtan.2enttractiononthecontactDatchofnlewhee¨ailduetotheaxle10adandmecreepage.ThemenIlal10ad,duetome衔ctionbe.“veenthewheel/railcontactingsurf.aces,isdirectlyandequiva—lentlyappliedtotheelementsnodesinthecontactpatch.Thenon—steadvheat仃ansfbrbetweenmecontactingsurf.acesofthewheel/rail.heat。convectionandradiationbetweenthewheel.railandtheambient

aretaken

intoconsideration.Throughtllenu.

mericalanalysis,thefollowingconclusionscanbedIawn.(1)Duringthewheel/railrolling—sliding。thethemals订essinthethinlayernearthecontactpatch,duetothe矗ictiontem口era.tLlrerise,isconsiderable.Thehigherr011ingspeedleadstothe

●一

一●

lower疗ictiontemDeranlreriseandsmallers仃ess.

(2)Duringthewheelp11reslidingontherail,the丘ictionternDeranlreandthemal—mechanicalstressofthewheel/tailrisequicklyatmeinitialslidingstage,andthengetsintoasteadystateThematerialwearratehasaninfluenceonthecouplin2ther—maI.mechanicals仃essduringthewearprocess.Thehigherthewearrateis.thelowermes仃essis.

Refbrences

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ZHAOXiniscurrcnnyworkingtowardhisPhDdegreeinDelfcUniversityofTecllIloIogy,Nemerlallds.HereceiVehismasterdegree丘omS诅teKcyLabo一眦oryofTractionPower’Soumwest

JiaotongUniversi够Ch试a,in2005.Heisengagedi11methennal

e腩ctsofwheel/miland

r01lingcontact州gue.

Tel:+86?28—87634355;E-mail:swjtIlzllaoxin@163.com

J矾XuesongiscufrentlyaprofessorjnStateKeyLaboratoryofTractionPower,SoumwestJiaotongUniVersity,China.HereceivedhisPhDde酽eeeom

StateKeyLaboratoryofTractionPower,Soulllwest

JiaotongUniversity,ChiIla,in2000.HisresearchfieIdincIudesrolIingcontactofwheel/rail.

Tel:+86—28-87634355;E—mail:xsjin@home.swjtll.e“.cn

ZHAIWanmingiscun℃ntlyapmfessor’aChan画iangscholarinS诅teKeyLaboratoryofThc廿onPower’SouthⅣestJiaotongUniversi饥China.Here.ceivedhisPhDdegree丘DmStateKeyLaboratoryofTractionPower’south.westJiaotongUniversity’Chilla,in1993.HisresearchfieldincludescouplingdynaIIlicsofmilvehiclesa11dtmcl(s.

1℃I:+86—28.87600773:E.mail:wmzllai@home.swjtu.edu.cn

ANALYSIS OF THERMAL-ELASTIC STRESS OF WHEEL-RAIL IN

ROLLING-SLIDING CONTACT

作者:ZHAO Xin, JIN Xuesong, ZHAI Wanming

作者单位:State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031, China

刊名:

机械工程学报(英文版)

英文刊名:CHINESE JOURNAL OF MECHANICAL ENGINEERING

年,卷(期):2007,20(3)

被引用次数:1次

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2.M. M. Ettefagh.M. H. Sadeghi.M. Rezaee Dynamic simulation of beam-like structure with a crack subjected to a random moving mass oscillator[期刊论文]-地震工程与工程振动(英文版)2009,8(3)

3.Huimin Wu.Semih Kalay Development of the Wheel/Rail Interface Management Model and its Applications in Heavy Haul Operations[会议论文]-2009

4.S.S. Law.X.Q.Zhu DYNAMIC CONDITION ASSESSMENT OF HIGHWAY BRIDGES INCLUDING OPERATIONAL CONDITIONS [会议论文]-2007

5.陈炎.黄小清.马友发COUPLING VIBRATION OF VEHICLE-BRIDGE SYSTEM[期刊论文]-应用数学和力学(英文版) 2004,25(4)

6.Jun Zhang.Shouguang Sun.Xuesong Jin NUMERICAL SIMULATION OF TWO-POINT CONTACT BETWEEN WHEEL AND RAIL[期刊论文]-固体力学学报(英文版)2009,22(4)

7.Lu Deng.Chan-Sheng Cai IDENTIFICATION OF DYNAMIC VEHICULAR AXLE LOADS USING SUPERPOSITION TECHNIQUE AND INFLUENCE LINE[会议论文]-2008

8.Wen Zefeng.Jin Xuesong.Zhang Weihua ELASTIC-PLASTIC FINITE ELEMENT ANALYSIS OF THREE-DIMENSIONAL CONTACT-IMPACT AT RAIL JOINT[期刊论文]-机械工程学报(英文版)2003,16(4)

9.Xuesong JIN.Zefeng WEN.Kaiyun WANG.Weihua ZHANG Effect of Welded Rail Joint Irregularities on Wheel-Rail Contact Stresses in Heavy Haul Operations[会议论文]-2009

10.WU Chuan.LIU Xue-wen.HUANG Xing-chun Alterable-element Method for Vehicle-bridge Interaction Considering the Transient Jump of Wheel[期刊论文]-上海交通大学学报(英文版)2008,13(3)

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