船舶撞击下的车—桥耦合系统动态响应分析.pdf

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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