京沪高速南京越江钢斜拉桥车桥耦合振动分析
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摘要
运用桥梁结构动力学与车辆动力学的研究方法，将车桥作为联合动力体系，以京沪高速铁路南京越江方案钢斜拉桥为研究对象，进行了高速列车过桥时的车桥空间耦合振动响应分析，着重研究了列车速度变化时对桥梁的挠度、车辆舒适度及脱轨安全度的影响。车桥计算结果表明，尽管该桥在设计荷载下（０．８ＵＩＣ）的挠跨比达１／６００，但仍能满足高速列车走行时的舒适性与安全性要求。
With the methods of bridge structural dynamics and vehicle dynamics, regarding high speed trains and the long span cable stayed bridge crossing over Yangtze river at Nanjing in Beijing Shanghai high speed railway as a combined vibration system, the 3 dimensional coupling vibration responses of the train and bridge are analyzed. The influences of the train speed on bridge deflection, vehicle comfort quality and safety quality are studied. Results show that, though the ratio of deflection to span under 0.8 UIC load is 1/600, high speed trains can pass it with satisfactory safety and comfort.
With the methods of bridge structural dynamics and vehicle dynamics, regarding high speed trains and the long span cable stayed bridge crossing over Yangtze river at Nanjing in Beijing Shanghai high speed railway as a combined vibration system, the 3 dimensional coupling vibration responses of the train and bridge are analyzed. The influences of the train speed on bridge deflection, vehicle comfort quality and safety quality are studied. Results show that, though the ratio of deflection to span under 0.8 UIC load is 1/600, high speed trains can pass it with satisfactory safety and comfort.
引文
1何度心．列车动载．地震工程与工程振动，1988；8（4）：78～982沈锐利．高速铁路线上简支梁桥车桥共振问题初探．西南交通大学学报，1995；30（3）：275～2823王福天．车辆系统动力学．北京：中国铁道出版社，1991：23～544程庆国，许慰平．大跨度铁路斜拉桥列车走行性探讨．’92全国桥梁结构学术大会论文集．武汉，1992：41～515松浦章夫．长大桥の列车走行性．JREA，1982；25（8）：156～1766严国敏．现代斜拉桥．成都：西南交通大学出版社，1996：243～247
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