不同车辆模型对车-桥系统动力分析的影响

THE INFLUENCE OF DIFFERENT VEHICLE MODELS ON DYNAMIC ANALYSIS OF VBS

本文讨论了车辆模型中各种位移自由度对车一桥系统动力分析结果的影响。根据轮轨间的相互作用,并考虑轨道的不平顺,推导了车-桥系统的动力方程。文章按七种不同的车辆模型计算了列车分别以五种不同的速度过桥时桥梁的空间动力响应以及列车在桥上不同位置时车-桥系统的自振频率和振型。通过分析和比较,对车辆模型中各种自由度对车-桥系统动力分析的影响有了比较清楚的认识。

This paper discusses how each DOF(degree-of-freedom) in an actual vehicle influence the results of the dynamic analysis of a VBS(vohicle-bridge-system). Acording to the interaction between wheel and track, and considering the track irregularity, the dynamic equilibrium equations of the VBS are derived. Seven kinds of different vehicle models are used to calculate the space dynamic responses of the bridge on which a train moves at five different speeds. The frequencies and the modes of vibration of the VBS are also calculated when the train moves on the different position of the bridge. By analysis and comparison of the results, it has been clear that how each DOF of the vehicle model influence the dynamic analysis of the VBS.