横向振幅超限桥梁上的列车运行安全性分析

Safety Analysis of Trains Running on Bridges as Their Lateral Amplitudes Exceeding Specifications

采用车桥系统空间振动计算模型,基于列车脱轨能量随机分析理论,对京沪线南京长江大桥128 m简支钢桁梁桥、京通线烟囱沟桥及东沟桥、京广线颖河桥等4座横向振幅超限桥梁的列车运行安全性、舒适性及平稳性进行计算和分析。结果表明:南京长江大桥128 m简支钢桁梁桥允许货物列车以80 km.h-1及以下车速通过;在烟囱沟桥,货物列车宜限速50 km.h-1运行;在东沟桥,货物列车宜限速60 km.h-1运行;在颖河桥,货物列车可以按设计车速(80 km.h-1)及以下速度运行。研究结果已分别被上海、沈阳及郑州铁路局采纳。

Based on the calculation model of spatial vibration of train-bridge system and the theory of random energy analysis of train derailment, 4 cases concerning the safety, comfort and stability of trains running on bridges, such as 128 m simply supported steel truss of Nanjing Yangtz river bridge on Beijing-- Shanghai railway line, Yanconggou bridge and Donggou bridge on Beijing-Tonghua railway line, and Yinghe river bridge in Beijing-Guangzhou railway line, are calculated and analyzed, respectively. The main results are obtained as follows. The speed of freight train running on the 128 m simply supported steel truss of Nanjing Yangtz river bridge can reach 80km·h^-1. The speed of freight train running on Yanconggou bridge and Donggou bridge should be limited to 50 and 60km·h^-1, respectively. And the speed of freight train running on the Yinghe river bridge can reach the design speed （80 km·h^-1 ）. Calculated results are applied by the Railway Administration of Shanghai, Shenyang and Zhengzhou respectively.