汽车-连续梁桥-列车耦合振动及行车舒适性研究

Study on the Coupled Vibration of Vehicle-Bridge-Train System and the Comfortableness of Driving

为研究车速、车辆编组及轨道不平顺等因素对汽车-桥梁-列车耦合系统的影响,本文以滨州黄河公铁两用桥梁为例,利用ANSYS软件,建立桥梁有限元模型及汽车和列车的多刚体模型,通过约束方程,将3个子系统进行耦合,得到了轨道不平顺、车速和车辆编组对桥梁动力位移和行车舒适性的影响。研究结果表明,增加桥梁结构阻尼,可以有效地减小汽车与列车间的相互影响;桥梁的结构位移主要与跨度和列车编组有关,与车速和轨道不平顺几乎无关;轨道不平顺对行车的舒适性影响非常大。该研究对行车舒适性具有重要意义。

In order to study the influence of the speed, train formation and track irregularity on the vehicle- bridge-train coupling system, taking the Binzhou railway bridge as an example, the finite element model of bridge and the multi-rigid body model of the trailer and the train are established in ANSYS. Three subsystems are coupled by applying constraint equations to obtain the influences of track irregularity, vehicle speed and vehicle formation on the dynamic displacement and driving comfort of the bridge. The research results show that increasing the damping of the bridge structure can effectively reduce the mutual influence between the vehicle and the train. The displacement of the bridge is mainly related to the span and the train-frame while the speed and the track irregularity have little influence on it. This research is of great significance for driving comfort.