铁路桥梁模态特性研究

Study on the characteristic of railway bridge mode

以实测铁路桥梁为原型,建立了考虑土 结构相互作用的三维有限元整桥模型。对几座典型桥梁进行了模态分析。指出整桥频率和有车频率是铁路桥梁的重要特征,直接影响着桥梁横向振动和行车安全。

Some measured railway bridges are taken as prototype and a 3D FEM model of the whole bridge is built up in this paper, of which the soilstructure interaction is taken into account. Modal analysis of some typical bridges is carried out. It is pointed out, that the Whole Bridge Frequency and the Withtrain Frequency are important characteristics of railway bridges, which have directly effect on the transverse vibration of bridge and the running safety of train.