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高速动车组车下悬吊水箱设备液固耦合振动分析和影响研究的中期报告.docx

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高速动车组车下悬吊水箱设备液固耦合振动分析和影响研究的中期报告 Introduction Thesuspensionsystemofunderframewatertankequipmentplaysanimportantroleinthesafeandstableoperationofhigh-speedtrain.However,duringthetrainrunning,theliquid-gascouplingvibrationofthesuspensionsystemofunderframewatertankequipmentmaycausethedynamicloadtoexceedthedesignlimit,whichmayleadtodamageoftheequipmentandaffectthesafetyandcomfortofpassengers.Therefore,itisnecessarytoanalyzetheliquid-gascouplingvibrationanditsinfluencingfactorsofthesuspensionsystemofunderframewatertankequipment. ResearchMethod Thisstudyusesthefiniteelementmethodtoestablishthenumericalsimulationmodelofthesuspensionsystemofunderframewatertankequipment.Thefluid-structureinteractionmoduleisusedtoanalyzetheliquid-gascouplingvibrationofthesuspensionsystem.Thevibrationaccelerationresponseoftheequipmentunderdifferentworkingconditionsisobtained,andtheinfluenceofdifferentparametersontheliquid-gascouplingvibrationofthesuspensionsystemisanalyzed. ResultsandDiscussion Theresultsshowthattheliquid-gascouplingvibrationhasasignificantimpactonthedynamiccharacteristicsofthesuspensionsystemofunderframewatertankequipment.Thevibrationamplitudeincreaseswiththeincreaseoftheliquidlevelofthewatertank,andthevibrationfrequencyshiftstothelowerfrequencyrange.Theincreaseoftheairpressureinthetankcaneffectivelyreducethevibrationamplitudeandshiftthevibrationfrequencytothehigherfrequencyrange.Theincreaseoftheviscosityofthefluidhasasignificantinfluenceontheliquid-gascouplingvibration,whichcanincreasethevibrationamplitudeandshiftthevibrationfrequencytothelowerfrequencyrange. Conclusion Thestudyanalyzedtheliquid-gascouplingvibrationofthesuspensionsystemofunderframewatertankequipmentanditsinfluencingfactorsthroughnumericalsimulation.Theresultsshowthattheliquid-gascouplingvibrationhasasignificantimpactonthedynamiccharacteristicsofthesuspensionsystem.Theincreaseoftheliquidlevel,fluidviscosity,anddecreaseofairpressureinthetankcanincreasethevibrationamplitudeandshiftthevibrationfrequencytothelower