冲击动力学_香港科技大学余同希讲座PPT

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1、IMPACTDYNAMICS冲击动力学余同希ProfessorT.X.Yu香港科技大学HongKongUniversityofScienceandTechnology12012年10月于浙江大学INTRODUCTION:ENGINEERINGBACKGROUNDCarcollisionShipcollisionTraincollisionAirplaneandSpacecraftNuclearplantsafetyOccupationalsafetySportsWeaponsPackagingImpactenergyabsor

2、bers2TRRCAFFICCACCCSIDENTSInjuriesandfatalitiescausedbyaccidentsaroundtheworld(peryear):InjuriesFatalitiesBlByalllttypesofifacciddtents:100million404.0millionBytrafficaccidents:30million1.2millionThisisequivalenttocrashof10jjjumbojets(eachcontains320passengers)everyday!Roadac

3、cidentiChitsinChina:Fatalities:about70,000peryearFatalitiesper10000vehicles:36Fatalitiesper10,000vehicles:3.63SHIPCOLLISIONShiptoshipShiptobridge/rock4TRAINCOLLISION温州动车追尾事故,2011年7月23日5HELICOPTER2007inMexico6客机坠落！！！！7AIRPLANE:IMPACTBYBIRD4~10times/yearW=0.45kg,V=80Km/h,F~

4、153kgbird8SPACECRAFTSpacedebris/spacetrashVelocity~10km/sTotalweight~3,000,000kg12000piecesofdebriswerecreatedbyacollisionbetweenaUS12,000piecesofdebriswerecreatedbyacollisionbetweenaUSsatelliteandaRussianoneinFeb2009,andfliedaroundtheearth9SAFETYOFNUCLEARPLANTS日本福岛核电站Safet

5、yshellPipe-whip10REMARKManyissuesinmodernengineeringrequireManyissuesinmodernengineeringrequirescientistsandengineerstounderstandthedynamicbehaviorofstructuresandmaterials.Asabranchofappliedmechanics,ImpactDiDynamicsaitimstorevealltthhjemajormechihanismsoflargedeformationandd

6、ynamicfailureofstructuresandmaterialsunderimpact&structuresandmaterialsunderimpact&explosiveloading,soastoestablishsimplifiedmodelsandeffectivemethodstodealwithmodelsandeffectivemethodstodealwithvariouscomplexissuesraisedfromengineering.11CONTENTSOFTHECOURSELecture1.Introduct

7、ionElasticWavesPlasticWavesLecture2.DynamicBehaviorofMaterialsInertiaForceandPlasticHingeInertiaForceandPlasticHingeLecture3.DynamicResponseofCantileversEffectsofTensileandShearForcesDynamicResponseofRigidPlasticDynamicResponseofRigidPlasticPlatesLecture4.EnergyAbsorptionofMa

8、terialsandStructuresTotal:12hours1固体和多胞材料中的弹塑性应力波，10月23日8008:00-1030