研究结论:根据车桥耦合有限元动力仿真计算得出的列车运营平稳度指标,以及客货车在不同速度下的现场试验测试数据的分析,表明更换新钢桁梁后,既有C62型货物列车运行速度达到65 km /h、新型货物列车K2运行速度达到100 km /h时,纵梁跨中竖向及横向位移、墩顶最大横向位移、动挠跨比等指标仍然满足允许值要求,车辆的各项动力性能指标良好。
Abstract：Research purposes: The Cao 'e River Bridge is required to change steel truss of main bridge due to electrification upgrading of Xiaoshan -Ningbo Railway. For meeting the speed -raise requiremen,t the on –site dynamic test is carried out to the bridge structure. The calculation resultsof fullbridge dynamic response at the different train speeds are offeredwith the establishmentofcalculationmodelofvehicle -girder-frusta system based onmeasured dynamic parameters and vehicle -bridge coupling dynamic simulation analysis. The operation safety and comfort level are evaluated forproviding the basis to control of the bridge operation state.
Research conclusions:The analyses of the train operation stability index calculated from vehicle -bridge coupling finite elementdynamic simulation and on -site testdata for the passenger and freight train atdifferent speeds show when the speed ofexistingC62 -model freighttrain reaches65 km /h and new type freighttrainK2 runs at100 km /h, the vertical and lateraldisplacementof longitudinalgirder, maximum lateraldisplacementof frusta top and dynamic ratio ofdefection to span can stillmeet the requirementof tolerable values, and the all dynamic performances ofvehicles are good.
李 涛,奚晋良,高 鹤. 萧甬线曹娥江大桥列车运行速度研究分析[J]. 铁道工程学报, 2009, 26(11): 28-30.
LI Tao, XI Jin-liang, GAO He. Study and Analysis of Train Running Speed on Cao'e River Bridge on X iaoshan-Ningbo Railway Line. 铁道工程学报, 2009, 26(11): 28-30.
2009, Vol. 26 
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