mcm优秀论文.docAnEnergyModelfortheStuntPersonAssumptions:.binedweight)ofthestuntperson(65kg)andthemotorcycle(135kg)is200kg..Themotorcycleandthestuntperson(MASP),areviewedideallyasarectangularsolid,,..Toguaranteesafety,theeffectof4gisthemaximumlimitthatisallowed..Theelephantisviewedideallyasarectangularsolid,6mlong,1mwideand4mhigh..Itisreportedthat,toavoidinjury,theverticalvelocityofMASPcan’tbelargerthan6m/swhilereachingtheground[4].Notations(thelettersinparenthesesaretheunitsofvariables):..(m).pressionstrengthofabox(N).Pmthesurfacingstrengthofpaper(N/m).(6m/sinourmodel).--IgnoringAirResistanceTheTrackisshownasFigure1:,thealtitudeofpointAandBofthetrackmustbenosmallerthanh,thatis:HA=HB=,wecangettheminimumvelocityofv(vmin)andthedistancebetweenpointDandE,whichisLDE=.TheAirResistanceModel--ountTheairresistancehassignificanteffectonthemotionofMASPandcannotbeignoredinthismodelsincetheMASP’,:,,that’sF=kv2,wherecoefficientkisaconstant[5].Basedonthisconclusion,wegetthefollowingequations:Forthesameprinciplerelatedbefore,thealtitudeofpointAandpointBmustsatisfy:HA=HB=-Wecanalsoget:LDE=Forfurtheranalysis,[1],themaximumverticalstrengthaboxcansustainisP=10PmLC,,wegetlittleinformationabouttherelationshipofCandhoranempiricalformul
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