斜拉桥在考虑风效应时的车一桥藕合振动
CouPledVibrationofTrainandCable一StayedBridges 初ththeEffeCtsof下Vind
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摘要: 以芜湖长江大桥为算例,考虑风荷载作用于列车和桥梁上,对ICE高速列车以Zook切“h的速度通过桥 梁时,计算了与列车运行安全性及旅客乘座舒适度相关的指标。风荷载考虑为脉动的,按si而u谱用MonteCarlo 法模拟脉动风速,结合由风洞试验测定的空气动力参数,计算了作用于列车和桥梁上的自然风荷载。根据结构 动力学理论,建立了机车(车辆)的动力学方程;建立了桥梁的有限元振动方程;桥上轨道不平顺按6级线路(最 好的线路)模拟。计算结果表明,对芜湖长江大桥,桥上允许行车的桥面处横桥向最大风速应小于30Abstract: InthisPaPer,thetrainsafetyandridingeolllfortofPassengersareanalyzed,bytaking WuhuBridgeovertheYangtZeRiverasanexampleandwindloadontrainsandthebridgeinto eonsideration.Windloading15eonsideredtobefluetuating,thespeedofwhieh15simulatedwith MonteCarlOmethodaeeordingtoSimiusPeetmm.Colnbinedwiththeaerodynamieparametersofthe bridgeandtrainsmeasuredbywindtunneltests,thenaturalwindloadaetingonthebridgeandtrains 15simulated.Dynamiee四ationsofloeomotivesandearsareestablishedaeeordingtothetheo巧of struetural街namies.VibrationequationsforthebridgearederivedusingsPatialbeamelement.Traek irregularity15simulatedwitha脚de6(thebestofthespeeifieation).Thesimulationresultsshowthat themaximumwind印eed15lessthan30而5foratraintorunsafelythroughtheWuhubridge.
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Key words:
- cablestayedbridges /
- windeffeet:foeomotives /
- ears /
- vibration /
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