高速铁路平纵断面轮轨系统振动特性

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1、西南交通大学硕士研究生学位论文第1I页AbstractWiththecomprehensiveconstructionandrapiddevelopmentofhigh-speedrailway，therunningmileageinourcountryhasbeentheworld’Slongestone．Butthestudiesonlli曲-speedrailwayinChinastartlate，manyplanarandverticalsection’Sparametersarestillbasedonthetestresu

2、ltsincommonrailway，orarereferredtoforeignhigh—speedrailways．Ononehand，thecontinuousincreaseofvehiclerunningspeedleadstomoresevererwheel-railvibration，SOthatthepreviousanalysisbasedonstaticorquasi-staticcannotmeettherequirementofdynamicdesignforthehi曲一speedrailway；ontheo

3、therhand，therunningmileageandterrainenvironmentabroadaredifferentfromthatinChina，SOthepracticalapplicabilityofforeignparametersneedtobetestified．Basedonthemulti-bodysystemdynamics，thecharacteristicsofwheel-railvibrationinhigh-speedrailwayarestudiedinthispaper，SOastoobta

4、intheparameters’dynamicreasonabledesignandmatchingontheplanarandverticalsection．Abriefintroductionofplanarandverticalsection’Sparametersisgiveninthisthesis．Thecircularcurveradiusandsuper-elevationneedtobothconsiderthehi曲一speedvehicleandmedium-speedvehiclecollineartransp

5、ortation，meanwhile，thetransitioncurvelengthandverticalcurveradiusinfluencepassengers’comfort．Alltheparametersarecalculatedaccordingtothetraditionaldesign．Therefore，itisnecessarytosuggesttheparameters’valuesonthebasisofsimulationresults．UsingtheSIMPACKsoftware，thedynamic

6、modelofhigll—speedvehiclespassingthroughtheplanarandverticalsectionisestablishedbysimplifyingtheprocessofhi曲一speedelectricmotortrainunit(EMU)．Then，thecharacteristicsofwheel—raildynamicresponsecalculatedbythesingle·-vehiclemodelandmulti·-vehiclemodelarecontrastedandanaly

7、zed．Resultsshowthat，withoutconsideringthetrain’Stractionandbraking，thedifferenceoftwomodels’dynamicindexesisverylittle．Theinfluenceofplanarandverticalsection’Sparametersonwheel—railvibrationinhi曲一speedrailwayisanalyzed．Resultsshowthat，thematchingbetweensuper—elevationan

8、dcircularcurveradiusshouldmeettherequirementofwheel—raildynamicperformanceofthehi曲-speedvehicleandmedium—speed