不同车辆模型对车-桥系统动力分析影响的研究

A Study of the Influence of Different Vehicle Models on the Dynanic Analysis of VBS

本文讨论了车辆模型中各种位移自由度对车-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。按7种不同的车辆模型,计算了列车分别以5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加深了认识。文中的主要结论,不仅对车-桥系统的动力分析有用,而且对车辆振动的稳定性分析也很有意义。

In this paper,the influence of the DOF(degree of freedom)in an actual vehicle on the results of the dynamic analysis of a VBS (vehicle-bridge-system) is discussed. According to the interaction between wheel and track, and considering the track irregularities, the dynamic equilibrium equations of the VBS are derived. Seven kinds of different 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 models 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 made clear the inflnence of DOF of the vehicle model on the dynamic analysis of the VBS. The main conclusions obtained in this study are not only significant for the dynamic analysis of VBS,but are also useful for the stability analysis of vehicle vibration.