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1、试析影响客车运行性能的原因（Analysisofthereasonsaffectingtheperformanceofpassengercars）Withtheincreaseofpassengertrainspeed,theproblemsofincreasinglongitudinalimpulse,decreasingcomfortandspeedingupthecouplerweararegraduallyexposedtospeedincreasingpassengercars.Duetothes
2、mallnumberofspeedincreasedpassengercars,themaintenanceregulationsofthevehiclepartshavenotbeenformedyet.Theyareonlycheckedaccordingtotheregulationsoftherelevantsectionsofthefactory,andfoundthatthoseexceedingthelimitshouldbereplaced.However,withtherapidincre
3、aseofspeedincreasingpassengercars,themaintenancevolumeandmaintenancecostofspeedincreasingpassengercarsareincreasingrapidly.Therearemanyopinionsaboutthedynamicperformanceofthevehicle,especiallythelongitudinalimpulseofthetrain.Tothisend,theMinistryofrailways
4、transportbureauandotherrelevantdepartmentsspecialprojectresearch,findoutthecausesofaffectingtheperformanceofpassengertrains,andstudiedsomesolutions.Therefore,howtosolvetheproblemofincreasingthelongitudinalimpulseofthespeedincreasingpassengercarsandspeeding
5、upthecouplerwearhasbecomeapressingmatterofthemoment.Statusoflongitudinalimpulseof1.trainsAfterseveraltimesofspeedincrease,somekeycomponentsofspeedincreasedpassengercarshavebeengreatlydeveloped,butthecouplerbufferdevicehasnotchangedmuchuntil2001.25Ktrainsti
6、llusescouplercouplerofNo.15couplerandG1draftgear.No.15couplercouplingduetothelargegap,gapofeachsectionofthetraintothecumulativeeffectof25Ktypetrainduringoperationofthelongitudinalimpulse;G1bufferperformancecannotcompletelymeetthespeedrequirements,duringnor
7、maloperation,basicallydonotabsorbenergy,resultinginarigidcollisionbetweenthecoupler,causedbythetrainlongitudinalimpulseintensified.Inthiscase,thelongitudinalimpulseproblemhasbecomeanimportantfactoraffectingthestabilityofthespeedpassengertrain.Therealtimede
8、tectionofthedataqualityofoperationof25Ktypetrainindifferentoperationconditionsofdifferentvehiclesandequipment,thediscoveryof25Ktypetrainlongitudinalimpulseprobabilityrelativetotheother25carstobesmall,butgrewu
