高速铁路结合梁桥与列车系统振动分析模型

提出了结合梁桥振动计算的翼缘砼板弹性剪切力法的分析模型及结合梁截面特性计算式 ,导出了结合梁桥刚度矩阵、质量矩阵、阻尼矩阵的计算式 ,算出了我国某高速铁路 4 0 m 50 m 4 0 m双线连续结合梁桥的自振特性 ,结果与自由度非常多的板壳元及杆元分析模型很接近 .还给出了车桥振动响应部分计算结果

Analytical Model of the System Vibration in High Speed Combination Girder Bridge and Train

An analytical model of the vibration of combination girder bridge is presented using a method called "flange plate elastic reaction method", taking into account the influence of distortion, warp and the local component and the expression of calculating the sectional property of combination girder bridge is developed also. By using the model, the expressions of stiffness, mass, and damper matrix are deduced. The dynamic characteristics of a double track continuous combination girder bridge over a high speed railway line are calculated. The results have been compared with that obtained from shell finite element model and space beam finite element model. It is shown that the results obtained from the model in this paper are closed well to that obtained from shell finite element model. The partial analytical vibration responses of the vehicle bridge system are also given.