铁路提篮拱桥车桥耦合振动分析

采用车桥耦合振动理论，分别建立了铁路车辆和提篮拱桥的动力模型及其运动方程．将车辆和提篮拱桥分为2个由非线性轮轨接触力联系的振动子系统，采用迭代法求解这2个子系统．用自编的车桥耦合振动软件对提篮拱桥的车桥耦合振动进行了分析，并对桥梁的横向与竖向位移、动力放大系数、车辆脱轨系数和轮重减轻率进行了评价，在所讨论的工况下，均满足我国相关规程的要求．

Coupled Vibration Analysis of X-Style Arch Bridge and Vehicles

Based on the coupled vibration theory, dynamical models and equations of motion were set up respectively to an X-style arch bridge and vehicles. Vehicles and X-style arch bridge were divided into two vibration subsystems connected by nonlinear contact forces between wheels and tracks, and the iteration method was used to solve the two subsystems. A self-developed software analyzing the coupled vibration of vehicles and bridge was applied to an X-style railway arch bridge. The vertical and transverse displacements of this bridge, its dynamic amplificatory factor, and the derailment and offload factors of vehicles were evaluated. The result shows that under the discussed conditions, they all meet the current national criteria.