高架轨道交通引起的车桥振动与控制分析-(6272)

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1、万方数据ABSTRACTABSTRACTABSTRUCT-Withtherapiddevelopmentofurbanrailtraffic，viaductrailtraffic，asonepartofurbanrailtraffic，alsodevelopsquickly．Thevibrationandenvironmentalproblemsinducedbyurbanrailtraffichavebeenattachedmoreattentionaswell．Whentrainsrunonviaductsofs

2、outhextensionofNanjingsubwaylineone，abnormalverticalvibrationcomesalong．Takingthephenomenaasanengineeringbackground，thispaperstudiesthetrain—bridgevibrationinducedbyviaductrailtrafficandcontrolmethods．Thispaperstudiesthevibrationoftrainandbridgebymeansoftheoret

3、icalanalysis，numericalsimulmionanalysis，experimentalverification．Intherecognitionofnaturalvibrationfrequencyofsubwaytrain，thispaperdeducesthedynamicsequationconsideringthedynamicinteractionofadjacenttrains．Inthispaper,fastenerstiffnessisalsoconsideredintheanaly

4、sisoftrain-track-bridgedynamicinteraction．Themainconclusionsareasfollows：(1)Actualparametersandnaturalvibrationfrequencyoftrainsareobtainedbyfieldtestofcar-bodynaturalvibrationandadjustmentofnaturalvibrationfrequencyoftrains，SOtheconclusionthattheresonancebetwe

5、entrainsandbridgewillnotoccuraredrawn．(2)Thevelocityconditionforresonancebetweentrainsandbridgeisgivenbythecomparisonofcar-bodynaturalvibrationfrequencywiththeequivalentmotivationappliedontrainswhentrainsmIlthroughequivalentspansofsimplysupportedbeams．(3)Vertic

6、alvibrationoftrainswillgetstrongwhentrainsrunfaster．Astherateofloadinggetshigher，thevibrationoftrainswillreduce．(4)Differencesofdampingfastenerswillhaveremarkableeffectsontrain—bridgevibration．AlthoughrelatedresearchshowsthattypeDTVIl2fastenerhasworseeffectonth

7、econtrolofenvironmentalvibrationcomparing、衙thtypeIllshockabsorber,thispaperfindsthattypeDTVIl2fastenerCandobetterinthecontroloftrain—bridgevibrationthantypeIIIshockabsorbenWiththecombiningoftheoryandexperiment，acomprehensivetestofthevibrationalstateoftrainsisca

8、rdedoutduringtheperiodoftrainoperation，andthecorrectnessoftheaboveconclusionscanbeverified．KEYWORDS：viaductrailtraffic；vibration；train—bridgevibration；emulationcalculation；s