Abstract: The coupled vibration analysis of rail-way simple-supported curved-girder bridges and vehicles was discussed in this paper. The dynamical equations of plane curved beam were deduced. According to features of coupled vibration between bridge and vehicle, a new numerical algorithm, which is based on the nonlinear excitation, was proposed. Above all, the algorithm can decrease the iterative time without losing precision. And the softwar VCBID was developed based on Windows 9X/2000/XP operation sy...

Key words: structural engineering, curved-girder, coupled vibration

摘要： 以某铁路曲线多跨简支梁桥为例，讨论了考虑桩土作用的铁路曲线梁桥车桥耦合振动。在对曲线梁桥车桥耦 合振动的分析中，建立了具有35个自由度的铁路车辆曲线通过模型和动力方程，建立了曲线梁的动力模型及其动 力方程；建立了一种基于激励非线性振动的数值方法，并在Windows9X/2000/XP工作环境下利用PowerStation和 VisualC++完成了计算程序的编制，取得了较好的计算结果。分析中将曲线通过的车辆和曲线梁桥分为两个由非线性 轮轨接触力所联系的振动子系统，通过迭代法进行求解这两个子系统；轨道不平顺采用在给定轨道条件下的人工模 拟不平顺，在分析过程中计入了不同车速对曲线通过的车辆及曲线连续梁桥振动的影响，得到一些有益的结论。

关键词: 结构工程, 曲线梁, 耦合振动