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时间:2020-03-28
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1、第16卷第9期2012年9月船舶力学JournalofShipMechanicsV01.16No.9Sep.2012ArticleID:1007—7294(2012)09—1064—2tDynamicSimulationofCableStayedBridge·--shipCollisionandItsImpactontheMovingTrainDUXin-guang1,JINXian-lon92,KUANGJunl,ZHANGHai-hual,LUXu-hong1(1.ChinaShipScientificResearchCenter,Shanghai20
2、0011,China;2.SchoolofMechanicalandPowerEngineering,ShanghaiJiaoTongUniversity,Shanghai200240,China)Abstract:Theworkaboutdynamicsimulationofbridge-shipcollisionanditsimpactonthemovingtrainisintroduced.Thethree-dimensional(3D)non-linearfiniteelement(FE)modelofcable—stayedbridge,ligh
3、tmetroandshipispresented.Thenumericalsimulationconsistsoffoursteps:simulationofinitialbridgestate,bridge-traincouplingsimulation,bridge—shipcollisionsimulationandbridge—train—shipinteractionsimulation.TheinitialbridgestateandlargedeformationarefulfilledbyusingUpdateLagrangeFormula
4、tionandCo—rotationalformulation.ValidationoftheapproachandFEmod—elsareachievedbycomparingthenumericalresultswiththecalculationofvalidatedplanebarsmod—els.Thebridge-traincouplingandshipimpactarerealizedthroughthepenalty—baseddynamiccon-tact—impactalgorithm.Computationtimewasreduced
5、byparalleldomaindecompositionwithRecur-siveCoordinateBisection(RCB)method.Explicitcentraldifferenceintegrationisemployedinthispapertoaccomplishthenumericalcomputation.Theproposedapproachesareprovedtobeeffectivetoapplyinthebridge,trainandshipdynamicanalysis,andthe3Dnumericalmodelca
6、nimprovetheunderstandingsofbridgedynamicbehaviorsduringbridgedesign.Theresultsshowthattheshipim—pactisthemostdangerousfortrainsafetywhenthetrainisarrivingatthemaintower.Keywords:cable-stayedbridge;bridge-shipcollision;bridge—-train-shipcoupling;dynamicsimulationCLCnumber:TU31TB533
7、Documentcode:A1IntroductionTheimpactfromshipsandbridgecaninducesignificanteffectswhichmustbeappropri—atelyconsideredatthebridgedesignstage.Manyresearchershadstudiedthebridge—shipcol—lisionforlongtime【1-2].Thecollisionisadynamicprocessandtheimpactloadsvarywiththetime.However,theequ
8、ivalentstaticloadswereoftenusedas
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