京沪高速铁路南京长江大桥列车走行性分析

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,建立了高速列车与大跨度斜拉桥的车桥耦合动力分析模型。以京沪高速铁路南京长江大桥3塔斜拉桥方案为例,分析了大跨度斜拉桥在ICE高速列车作用下的车桥动力响应特点;同时,基于合理的列车走行性评价指标,对高速列车通过大跨度斜拉桥时的走行安全性与舒适性进行了详细分析,初步探讨了大跨度斜拉桥用于高速铁路的可行性。

TRAIN RUNABILITY OF THE SCHEMED BEIJING-SHANGHAI HIGH-SPEED RAILWAY ON THE NANJING YANGTZE-RIVER BRIDGE

Regarding the vehicle and the bridge as a combined vibration system, a vehicle/bridge interaction model is established for predicting dynamic responses of long-span cable-stayed bridges subjected to moving high-speed train. The 3D free vibration properties of the cable-stayed bridge with three towers of the schemed Beijing-Shanghai high-speed railway NanjingYangtze-River bridge are analyzed by space bar FEM model. The coupling vibration responses of vehicle-bridge system under moving ICE high-speed trains are calculated and the properties of vibration responses are analyzed. Based on the reasonable assessment index, the train running safety and passenger riding comfort across the bridge are especially studied. The applicability of long-span cable-stayed bridge for high-speed railway is investigated preliminarily.