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1、中文摘要為了防止內(nèi)燃機(jī)車輪箍弛緩造成的機(jī)車脫軌事故,鄭州鐵路局機(jī)務(wù)處提出?橇車輪對(duì)輪篷杰娶裝據(jù)巧熬方案。緦輥車輪磚輪簸攘裝搗環(huán)愛導(dǎo)致輪鼴續(xù)椽上的變化,對(duì)輪對(duì)在避用過(guò)穰中的應(yīng)力及其分布狀態(tài)會(huì)有一定的影響,剎車制動(dòng)中囊予摩擦引起的離漫也霹越使輪鐿發(fā)生遲緩??⒃M(jìn)行車?yán)?,掰熱墊片懿間隙大小對(duì)輪對(duì)會(huì)宵影響,目前還沒有相關(guān)的理論研究。輪箍遲緩的研究對(duì)保障鐵路運(yùn)輸焱全、保護(hù)匿家秘個(gè)人賦產(chǎn)安全,避免困遲緩造成的經(jīng)滂擐失鞠社會(huì)不良影響有十分黧大的意義。因此,有必要對(duì)機(jī)車輪對(duì)加裝扣環(huán)的方案進(jìn)行理論的分析研究,必機(jī)車輪對(duì)的檢修限度撼供理論依
2、握,保證鐵鼴機(jī)車安全運(yùn)行。本文以DF。型樅車戈例,針對(duì)鄭加l鐵路燧楓務(wù)處提出豹繪組裝式機(jī)車輪對(duì)輪箍加裝扣環(huán)的方案,首先對(duì)該方案進(jìn)行了詳細(xì)的分析,建立了相芙模型,選定在最惡劣的王況下遴弦結(jié)構(gòu)靜力分耄盱,文中利用大越三維有限元分耩軟件ANSYS進(jìn)行計(jì)算與模擬,模叛分析的結(jié)論蹙加裝翔環(huán)對(duì)輪對(duì)的整體應(yīng)力影響很小,并對(duì)輪輞的s型輻板形狀做了一定的憂化;其次,針對(duì)由于輪輞的磨損引起加裝墊片的模型,分析了墊片闋隙大小對(duì)輪對(duì)的影晌。最后分析了在緊急制動(dòng)工況下,輪對(duì)的邊界條件及摩擦熱的大小,并根據(jù)實(shí)際情況建立了物理模型,對(duì)加裝翔環(huán)后靜輪對(duì)迸
3、彳予了溫度場(chǎng)分析,確定輪對(duì)各部分的澈度分布及熱應(yīng)力分布。本文的主要研究成果是:完成了對(duì)加裝扣環(huán)方案的結(jié)構(gòu)靜力分析及緊急剎車過(guò)程中豹溢度場(chǎng)分析,在最瑟劣熊工況下并沒有遮緩現(xiàn)象發(fā)嫩,扶壤論上話鞠了此方案是切實(shí)可行的。疆惹,對(duì)本文豹工作遴彳亍了總結(jié),據(jù)密了今君研究工俸的重點(diǎn)。關(guān)鍵詞:有限元,艨力場(chǎng),溫度場(chǎng),菲線性按觸分析,輪箍遲緩ABSTRACTTopreventthedigressionaccidentscausedbylocomotive’Sbandagerelaxation,Zhengzhoutrainstationput
4、forwardtheschemeofwheel-setequippedwithbuckle.Butafterfixation,structurechangeswhichcertainlychangesthestressanditsdistributionforacertainextentwhenmoving.Andthehi【曲temperaturecausedbyfrictionduringbrakingmaybeleadtothebandagerelaxation.Aftercutofthewheelrim,thega
5、pofthebearingstripaffectsthestressvalue.Tillnow,thereisnoresearchcarriedoutaboutthis.Theresearchaboutbandagerelaxationwillsurelydoessignificancetothesafetyofrailwaytrafficandprotectionofthenationproperty,avoidingtheeconomydamageandbadsocialimpacts.So,itisnecessary
6、todosomeresearchwiththescheme,toprovidethelocomotiverepairlimitwiththeorybasisandensuresafeperformance.Inaccordance謝mthescheme,takingtheDF4locomotiveforexample,calculationsandsimulations黜proposedbyANSYSsoftware.First.detailedanalysisoftheschemeiscarriedthrough;mod
7、elisbuilt,thantheworstsituationischosentodotheslmctureanalysis.Thelarge—scalethree—dimensionalFEAsoftwareANSYSiSchosentoealculateandsimulate.Andconclusionsarethattheeffecttothewholewheelisminor.AttheSametime,optimizetheSplateofthewheelrim.Second.buildthemouldwimdi
8、fferentpads;analyzedifferentstressdistribution塒tlldifferentgaps.Third,duringtheemergencybraking,theboundaryconditionandthefrictionheatareanalyzed,thenmo