简介：Thesimulationofthewholeship-bridgecollisionprocesscanbeeffectivelycarriedoutbynonlineardynamicfiniteelementmethod.Basedonthesimpledescriptionofthetheory,ascenarioofa40000DWToiltankercollidingwithabridgeacrosstheYangtzeRiverisdesignedforsimulation.Thetechnologyofstructuremodelingandthedeterminationofrelatedparametersareintroduced.Thedeformationofthebulbbow,thehistoryofcollisionforcechange,theexchangeofcollisionenergyandthestressdistributionofthebridgepieraredescribedindetail,whichareofgreatvaluetobridgede-signandbridgepierdamageestimation,Somemechanicalcharactersintheprocessofship-bridgecollisionaredescribed.Moreaccurateresultscanbeproducedbyfiniteelementmethodthanthatbyempiricalformulasandsimplifiedanalyticalmethods.

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简介：在地震刺激下面的液体结构相互作用是很复杂的，并且这样深水里的桥的损坏鉴定是关键技术保证安全服务。就增加的集体效果和液体结构相互作用效果而言基于非线性的莫里森方程，结构上的水动力学压力的效果被分析。一系列在水下的摇晃表格测试在空中并且在水里被进行。水动力学压力影响的动态特征被讨论，水动力学压力的分发也被分析。另外，结构的损坏通过自然频率和形式的弯曲的差别被区分，并且当时与测试结果相比。这研究的数字模拟和测试显示结构上的水动力学压力的效果不应该被忽视。损坏，损坏的地点和严厉的度的存在能通过结构频率和形式的弯曲的差别的变化被判定，这也被发现。

简介：ImmersedtunnelisanimportantpartoftheHongKong–Zhuhai–MacaoBridge(HZMB)project.Inimmersedtunnelfloating,translationwhichincludesstraightandtransversemovementsisthemainworkingmode.Todecidethemagnitudeanddirectionofthetowingforceforeachtug,aparticleswarm-basedtranslationcontrolmethodispresentedfornon-powerimmersedtunnelelement.Asortoflinearweightedlogarithmicfunctionisexploitedtoavoidweaksubgoals.Insimulation,theparticleswarm-basedcontrolmethodisevaluatedandcomparedwithtraditionalempiricalmethodinthecaseoftheHZMBproject.Simulationresultsshowthatthepresentedmethoddeliversperformanceimprovementintermsoftheenhancedsurplustowingforce.