车辆与路基路面耦合的动力学分析及其仿真

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1、南京林业大学硕士学位论文车辆与路基路面耦合的动力学分析及其仿真姓名：董慧申请学位级别：硕士专业：森林工程指导教师：赵尘;陈宁20070601TheSimulationStudyonCouplingDynamicsofVehicleandRoadbedAbstractVehiclesonroadtrafficarebecominglarge—sized，overloadedwithhi曲speedandheavyload．nenrlevennessofpavementsurfacehascausedheavyvibrationofvehiclesin

2、hi曲speedandincreaseddynamicloadonroad，aggravatingthedamagetopavement．Astheresult，waves，rutsandcracksonasphaltpavementandnetcracksandbreakawayoncementpavementoccur,whicharecloselyrelatedtothedynamicloadbetweenvehiclesandpavements．Theconventionaldesignmethodforpavementbasedonsta

3、ticloadisnolongersuitedtoactualcondition．nleeffectofdynamicloadmustbeconsideredindesign．nedynamicsrelationinvehicle-roadinteractionWasstudied,withthefollowingasthereset．Firstly,amodelofaquarterofavehiclewithtwo-degreeoffreedomwasestablishedalongsidewiththefiniteelementmodelofr

4、oadbed—roadsurfaceandtheinputmodelofflexiblepavement．Secondly,themodaltruncationmethodWasadoptedforthelow-orderingofthedynamicfiniteelementmodeloftheroadbed-roadsurface．111etransformingfimctionbetweenpavementdeformationandtireforceWasobtained．Theelasticdynamicfiniteelementsyst

5、emofflexiblepavementWasprogrammedwimMATLABlanguage．solvingtheanalymsofpavementresponseunderrandom10ad．Thirdly,thevehicle-roadinteractionWasstudied，111emodeloftransformingfunctionfordynamiccouplingsystemofvehicleandroadbed—roadsurfaceWassimulatedonSimulink，system．withtheinputmo

6、delofpavementastheexcitation．111edynamictireforceWasobtainedastheresponse．豇leresponseofroadbed-roadsurfaceunderrandomloadwasderivedfromthedynamicfmiteelementmodel，appliedwiththerandomdynamictireforceabove，togetherwiththedynamiccalculationbyWilson-0method．Theanalysisshowedthede

7、creaseofverticaldynamicStresswithdepthinpavement．111eeffectsofvehiclespeedandroadbedrigidityOildynamicdeformationofpavement，dynamictireforceandvertiealaccelerationwereanalyzed·The陀lationbetweendynamictireforceanddynamicdef0册alionofr吲su出cewasanalyzedaswell．Finally,thesimulation

8、ofcontrolstrategyforvehicleactivesuspensionWasc枷edout．Theeffe