轮胎-路面动力相互作用的数值仿真研究

轮胎-路面动力相互作用的数值仿真研究轮胎-路面动力相互作用的数值仿真研究

摘要：

车辆行驶过程中，轮胎和路面的动力相互作用是影响车辆行驶稳定性和路面磨损的重要因素。本文采用LS-DYNA有限元软件对轮胎和路面的动力相互作用进行数值仿真研究。首先，采用欧拉-伯努利梁理论建立了轮胎的有限元模型，并利用非线性材料本构模型对轮胎的力学特性进行描述。接着，采用弹性接触力理论建立了路面的有限元模型，并考虑路面的非均匀性对仿真结果的影响。然后，将轮胎和路面有限元模型组装成完整的轮胎-路面动力相互作用系统，并采用隐式时间积分算法进行数值仿真。最后，对不同工况下轮胎和路面的动力相互作用进行计算和分析，得到了轮胎负荷、胎压、路面粗糙度等因素对轮胎和路面动态响应的影响规律。研究结果可为车辆轮胎设计和路面维护提供理论参考。

关键词：轮胎；路面；动力相互作用；数值仿真；LS-DYNA

Abstract：

Thedynamicinteractionbetweentireandpavementisanimportantfactoraffectingthestabilityofvehiclemotionandpavementwearduringvehicleoperation.Inthispaper,theLS-DYNAfiniteelementsoftwareisusedtonumericallysimulatethedynamicinteractionbetweentireandpavement.Firstly,thefiniteelementmodeloftireisestablishedbasedontheEuler-Bernoullibeamtheory,andthemechanicalpropertiesoftirearedescribedbyusingnonlinearmaterialconstitutivemodel.Secondly,thefiniteelementmodelofpavementisestablishedbasedontheelasticcontactforcetheory,andtheinfluenceofpavementnon-uniformityonsimulationresultsisconsidered.Then,thefiniteelementmodelsoftireandpavementareassembledintoacompletetire-pavementdynamicinteractionsystem,andtheimplicittimeintegrationalgorithmisusedfornumericalsimulation.Finally,thedynamicinteractionbetweentireandpavementunderdifferentworkingconditionsiscalculatedandanalyzed,andtheinfluenceoftireload,tirepressure,pavementroughnessandotherfactorsonthedynamicresponseoftireandpavementisobtained.Theresearchresultscanprovidetheoreticalreferencefortiredesignandpavementmaintenanceinvehicleengineering.

Keywords:tire;pavement;dynamicinteraction;numericalsimulation;LS-DYNTire-pavementinteractionplaysacrucialroleinvehicledynamicsandsafety.Thedynamicinteractionbetweentireandpavementinvolvesthecomplexmechanicalbehaviorofbothmaterials,includingtiredeformation,contactareapressuredistribution,pavementdeformation,andfrictionalforcesattheinterface.

Numericalsimulationisaneffectivetooltoinvestigatethedynamicinteractionbetweentireandpavement.LS-DYN,awidelyusedcommercialsoftwarepackageforfiniteelementanalysis,canmodelthenon-linearbehaviorofbothtireandpavement,consideringmaterialproperties,geometricalshape,andoperatingconditions.Basedonnumericalsimulation,researcherscanobtaindetailedinformationaboutthemechanicalbehavioroftireandpavementundervariousworkingconditions,whichisdifficultorevenimpossibletoobtainthroughexperimentalmethods.

Inthesimulationprocess,avirtualtiremodelisfirstconstructedbasedontiredesignparametersandmaterialproperties.Pavementisalsomodeledusingfiniteelementanalysis,accountingforthegeometricalprofile,elasticmodulus,andsurfaceroughness.Thephysicalinteractionbetweentireandpavementisdescribedbythecontactalgorithm,whichconsiderscontactareapressuredistributionandfrictionalforcesattheinterface.Thesimulationscanbeconductedundervariousloadingandoperationalconditions,suchasdifferenttireloads,inflationpressures,andpavementroughness.

Theresultsofthesimulationcanprovidevaluableinsightsintothedynamicinteractionbetweentireandpavement.Forexample,thecontactareapressuredistributioncanbeanalyzedtoevaluatethepossibilityoftire-pavementslippageorskid,whichiscriticalforvehiclesafety.Thedeformationoftireandpavementcanalsobeevaluatedtodeterminethelongevityofpavementunderdifferentloadingconditions.Thesimulationcanalsoidentifycriticalfactorsthatinfluencetire-pavementinteraction,suchaspavementroughness,tireload,andinflationpressure.

Inconclusion,numericalsimulationusingLS-DYNisausefulmethodforinvestigatingthedynamicinteractionbetweentireandpavement.TheresultsofthesimulationcanprovidevaluableinformationfortiredesignandpavementmaintenanceinvehicleengineeringMoreover,numericalsimulationusingLS-DYNoffersacost-effectiveandtime-efficientsolutiontostudytire-pavementinteractioncomparedtolaboratoryexperiments,whicharelimitedbyequipmentavailabilityandcostlytestingprocedures.Furthermore,thesimulationresultscanbeeasilyexportedandanalyzedusinggraphicalandstatisticaltools,providingsignificantinsightsintotire-pavementinteractionthatcanbeusedfordesignoptimization,vehicleperformanceimprovement,andpavementdurabilityenhancement.

However,itisimportanttonotethatnumericalsimulationalsohaslimitationsthatneedtobeaddressed.Forinstance,theaccuracyofthesimulationresultsishighlydependentonthequalityoftheinputdata,includingthematerialproperties,boundaryconditions,andmodelingassumptions.Therefore,acarefulvalidationprocessisneededtoensurethesimulationresultsarereliableandconsistentwithexperimentalobservations.

Inaddition,thecomplexityofthesimulationmodelsandthecomputationalrequirementscanposesignificantchallenges,especiallywhensimulatinglarge-scalesystemsorinvestigatingcomplexloadingconditions.Asaresult,high-performancecomputingresourcesmaybeneededtoensurethenumericalsimulationisfeasibleandefficient.

Despitethesechallenges,numericalsimulationusingLS-DYNremainsavaluabletoolforinvestigatingtire-pavementinteractionandprovidinginsightsintovehicleandpavementperformance.Astechnologycontinuestoadvance,andcomputationalresourcesbecomemoreaccessible,thepotentialofnumericalsimulationtoimprovevehicleengineeringandpavementmaintenancewillonlycontinuetogrowInadditiontotire-pavementinteraction,numericalsimulationhasalsobeenappliedtoinvestigateothervehiclesystemsandcomponents,suchassuspensionsystems,chassisstructures,andcrashworthiness.Oneoftheadvantagesofnumericalsimulationistheabilitytoanalyzeandoptimizedesignconceptswithouttheneedforcostlyphysicaltesting.Thiscansavetimeandresourcesintheproductdevelopmentprocess.

Forexample,LS-DYNhasbeenusedtosimulatetheperformanceofsuspensionsystemsundervariousloadingconditionsanddrivingmaneuvers.Theresultsofthesesimulationscanhelpengineersoptimizesuspensioncomponentdesign,improveridecomfort,andreducevehiclenoiseandvibration.

Inthefieldofcrashworthiness,numericalsimulationhasbeenusedtodevelopandevaluatesafetysystemsinvehicles.LS-DYNcansimulatethebehaviorofavehicleduringacrashevent,allowingengineerstoanalyzetheeffectivenessofsafetysystemssuchasseatbelts,airbags,andenergy-absorbingmaterials.Thiscanleadtothedevelopmentofsafervehiclesandreducetheriskofinjurytooccupantsintheeventofacrash.

Moreover,numericalsimulationhasbeenappliedinthefieldofpavementmaintenanceandrehabilitationtoevaluatetheperformanceofnewpavementmaterialsanddesignconcepts.LS-DYNhasbeenusedtosimulatethebehaviorofpavementssubjectedtodifferenttypesofloading,suchasheavytrucksandaircraftlandinggear.Thiscanhelpresearchersdeterminethemostsuitablepavementmaterialsanddesignconfigurationsfordifferenttypesofloadingandenvironmentalconditions.

Inconclusion,numericalsimulationusingLS-DYNprovidesapowerfultoolforinvestigatingvehicleandpavementperformance.Althoughthere