車輪磨耗及其對(duì)車輛動(dòng)力學(xué)性能的影響.pdf

1、西南交通大學(xué)碩士學(xué)位論文車輪磨耗及其對(duì)車輛動(dòng)力學(xué)性能的影響姓名：黃照偉申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：車輛工程指導(dǎo)教師：金學(xué)松201206西南交通大學(xué)碩士研究生學(xué)位論文第H頁(yè)Abstract珊1eelweal“isacommonprobleminrailwaytransportation珊leelweal“causeschangeofwheelprofileinthelateralandcircumferentialdirectionsofwh

2、eeltreadandthusmaycausegreatchangeinthewheel—railcontactrelationship，whichmayleadtothedegradeofdynamicresponseofvehiclesAsurveyfoundthattheformofthewheelweal“variesfromconditionsofbothtrackandvehicleItiSalsofoundthatthef

3、ormofwheelWeal“havedirectinfluenceonthesafetystabilityandcostoftheoperationofhighspeedtrainsnlewheelwearhasbecomeoneofthemajorproblemsinthehighspeedrailways，andtherefore，becomeahotspotofresearchinthemajorrailwaytransport

4、ationnationsThemainworkofthisthesisincludes：(1)Monitoringofwheelwearoftrainsoperatingonahi曲一speedrailway111eresultsindicatethathollowwearofthewheeltreadis也emainwearstyleonthemonitoredhighspeedvehiclesAllwheelsareworntodi

5、fferentlevelsSomeof也evehicleswerefoundtohavewheeldeflectedwearthatlcanstothesamesideofthevehicles(2)ThevehiclesystemdynamicmodelofthemonitoredtrainswasbuiltThedetrimentaleffectsofhollowwearandotherwearstylesonthevehicled

6、ynamicperformanceweresimulatedThestrategyofwheelreprofilingwasdiscussedTheresultsshowmatnegativeequivalentconicityOCCURSontheconditionofwheeldeflectedwearwhichlcadstotheequilibriumpositionofwheelsetoffsetsfromthemiddleof

7、thetrackwhichinreturnacceleratesthedeflectedwearThereareseveralwheel／railequilibriumpositionsonthehollow—wornwheeltreadprofileThus，thewheel／railcontactpointjumpsfromoneequilibriumpositiontoanotherwhenthevehicleisrunninga

8、tahighspeedleadingtoa‘‘flangetoflange’vibrationwhichcanaffectthevehicledynamicbehaviorThepresentofdeflectedwearonthehollowwornwheelsmakestheinfluenceofthe“flangetoflange”vibrationonthevehicledynamicbehaviormorecomplexOnt

9、hesamebogie，ifthewearoftwowheelsetsiSdeflectedtooneside。thedeflectedwearhasgreaterinfluencethanthatiSdeflectedondifferentsidesThevehicledynamicbehaviorwithdifferentwheelwearstyleswasanalyzedandadvicesonwheelreprofilingwe

10、regiven(3)AthreedimensionalwheelrailcontactmodelwasestablishedbasedonthesplinefittedprofileofthemeasuredIreadprofileItiSfoundthatthereiSatwopointcontactbetweenthewheelandrailbecauseofthehollowwearresultinginsmallercontac

11、tareaandextremelyhighcontactstresswhichmaycauseplasticdeformationont11ewheelandrail(4)MonitoringofwheelpolygonalizationWasconductedonhighspeedtrainsThemainordersofpolygonalizationwereidentifiedandtheresultsWasusedintheve