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挟沙强横风对高速列车气动特性的影响研究（英文）.docx

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挟沙强横风对高速列车气动特性的影响研究（英文） StudyontheInfluenceofWindGustsontheAerodynamicCharacteristicsofHigh-SpeedTrains Abstract: High-speedtrainshavebecomeavitalmodeoftransportationinmodernsociety.However,theyareoftensubjectedtovariousenvironmentalconditions,particularlywindgusts,whichcansignificantlyaffecttheiraerodynamicperformance.Thisstudyaimstoanalyzetheimpactofwindgustsontheaerodynamiccharacteristicsofhigh-speedtrains.ComputationalFluidDynamics(CFD)simulationsandwindtunnelexperimentswereconductedtoinvestigatetheeffectsofwindgustsonthetrain'sairflow,drag,andstability.Thefindingsprovideinsightsintoimprovingthedesignandsafetyofhigh-speedtrainsinwindyconditions. 1.Introduction High-speedtrainsaredesignedtooperateeffectivelyinvariousweatherconditions.However,windgustscanposesignificantchallengestothesetrainsduetotheirimpactonaerodynamicperformance.WindtunneltestingandCFDsimulationshavebeenwidelyusedtostudytheaerodynamiccharacteristicsofhigh-speedtrains.Thispaperaimstofurtherexploretheinfluenceofwindgustsonahigh-speedtrain'saerodynamics. 2.Methodology 2.1WindTunnelExperiments Awindtunnelexperimentwasconductedtoanalyzetheeffectsofwindgustsonascalemodelofahigh-speedtrain.Theexperimentalsetupincludedamotor-drivenmodeltrain,awindtunnel,andvarioussensorsformeasuringairvelocity,dragforce,andstability.Windgustprofilesweresimulatedbyvaryingthewindtunnelvelocityatspecificintervals. 2.2ComputationalFluidDynamics(CFD)Simulations CFDsimulationswereperformedtoinvestigatetheaerodynamicperformanceofahigh-speedtrainunderwindgustconditions.Thetraingeometrywascreatedbasedonareal-lifehigh-speedtrainmodel.Thesimulationsincorporatedunsteadyflowanalysistocapturedynamicchangesintheairflowaroundthetrainduetowindgusts. 3.ResultsandDiscussion 3.1WindTunnelExperimentResults Thewindtunnelexperimentsrevealedthatwindgustssignificantlyaffectthetrain'sairflowpatterns.Whensubjectedtoasidewindgust,thetrainexperiencedanincreaseindragforce,leadingtohigherenergyconsumption.Thestabilityofthetrainwasalsoaffected,withla