曲率半径对曲线连续梁桥车桥耦合振动的影响

Effect of Curvature Radii on Vehicle-Bridge Coupled Vibration about Continuous Curved Girder Bridges

将曲线通过的车辆和曲线连续梁桥分为2个由非线性轮轨接触力所联系的振动子系统,运用车桥耦合振动理论,建立铁路车辆曲线通过模型动力方程、曲线梁桥的动力模型及其动力方程,应用基于激励非线性振动的数值算法,编制曲线梁桥车桥耦合振动分析软件VCBID,重点讨论了不同曲率半径对曲线连续梁桥车桥耦合振动的影响。分析结果表明在曲线梁桥的车桥耦合振动分析中应计入曲率半径的影响。

The curvedly-passing vehicles and the continuous curved girder bridges are regarded as two dynamic subsystems connected by the nonlinear contact forces between the wheels and track. By using the vehicle-bridge coupled vibration theory, the dynamic models and equations for both the curvedly-passing railway vehicles and the continuous curved girder bridges are established. On the basis of the numerical algorithm of the excited nonlinear vibration, the analysis software VCBID for the vehicle-bridge coupled vibration about the curved-girder bridges is compiled, and the effect of different curvature radii on the coupled vibration about the curved girder bridges is studied in particular. The analysis results in the paper indicate that the effect of the curvature radii should be reckoned in the analysis of the vehicle-bridge coupled vibration about the continuous curved girder bridges.